Septic tank with high GWL
The construction of a country house does not end with the construction of a box. The most difficult and crucial stage is ahead - the construction of utilities. They determine the comfort of living outside the city.
Perhaps one of the most important systems is water disposal. In most suburban settlements, there is no central sewage system, which means that its construction is the concern of the owner of the house. It is especially difficult to organize a sewer network if the house is located on an area composed of quicksand or has a high level of groundwater.
Are you ready to give up the usual urban comfort and you want to live in a country house with “amenities in the yard”? Most likely no. So it's time to choose equipment for the drainage system.
There are two possible options: a flow-through septic tank or autonomous local treatment facilities. At first glance, it may seem that both options have their advantages and disadvantages, and this would be true if we were talking about areas with a normal GWL. With quicksands, everything is much more complicated. Let's take a closer look at all this.
The nuances of installing a septic tank in quicksand
It is incredibly difficult to mount a septic tank for a private house with a high level of groundwater in quicksands. Quicksands are a mixture of sand and water. He quickly blurs the walls of the pit, filling it. In clays and loams, the installation of a septic tank in quicksand is easier, but not much. In any case, such work is very labor intensive.
It is easier to dig a pit for a septic tank in quicksand in winter, since the soil freezes over, does not float, and the level of groundwater and flood waters goes down. Despite this, the risk remains that the groundwater will not sink below the required depth.
In the summer, when the groundwater reaches its maximum level, the installation of a septic tank in the country house is necessarily carried out with the installation of formwork. This complex, time-consuming work is carried out in several stages:
- The pit for the installation of a septic tank is dug before water appears. The depth depends on the characteristics of the site.
- After the appearance of water, the assembly of the formwork begins. In case of high ground water, formwork with a frame is mandatory. The frame is assembled from a solid bar on which the guide boards are attached. Their choice is also not an easy task, because in the case of an incorrect calculation, the soil pressure will simply crush the entire formwork.
- If a lot of water comes in, then it is necessary to additionally dig a drainage pit into which water will go from the pit. A drainage pump for dirty water is installed in the pit and groundwater is constantly pumped out.
- Formwork installation. After assembly, the frame is lowered to the current bottom of the excavation and excavation continues. As it deepens, the frame is lowered and new boards are stuffed on top. Constant pumping and installation of the boards occurs until the required depth is reached.
- A septic tank is lowered into the resulting pit. Regardless of the model of the septic tank, all installation work is done manually, without the use of special equipment. Immediately after installing the station in the pit and leveling it, it is necessary to fill all chambers with water as quickly as possible.
- At the last stage, the development of the sewer trench takes place, this stage also complicates the fluidity of the soil, a pipeline is laid and the sewer pipe is connected to the station.
In practice, the installation of a septic tank with a high level of groundwater can be complicated by other factors, for example, the complex topography of the site or the special location of the station, the lack of the possibility of rapid water intake or the impossibility of its rapid discharge, for example, into storm runoff, etc.
Having figured out the nuances of installation with high groundwater, let's return to the question of choosing the right type of septic tank.
Flowing septic tank
Simple 3-chamber septic tanks without aeration, sometimes with a submersible ruff bio-loading, for example, as Eurolos Eco. They are distinguished by their low price, ease of installation and operation. The model range allows you to choose a device with the required performance. It would seem that flowing septic tanks are the best choice for cost. In practice, everything is different.
A flowing septic tank cannot provide the degree of wastewater treatment up to sanitary standards, which means arrangement of post-treatment systems will be required - one or more drainage elements or a whole filtration field.
High groundwater is always the risk that some of the untreated wastewater will fall into the ground and poison everything around. Therefore, in such conditions, it is impossible to install septic tanks with additional wastewater treatment with soil.
And then a logical question arises: - "Then what is right?"
Local treatment facilities
These are biological wastewater treatment plants with gravity or forced discharge of treated water. Their distinctive feature is wastewater treatment directly inside the septic tank, i.e. additional treatment with soil is not required. After passing through all stages of treatment, the wastewater meets the requirements of SanPin 2.1.5.980-00 "Hygienic requirements for the protection of surface waters."
Within the framework of a separate house built on a plot with a high ground level, this also means savings in the process of operation. The treated effluent is suitable for technical purposes such as watering the lawn. They can also be safely dumped into the ground, which means that the arrangement of additional treatment systems is not required. Having analyzed these advantages, we get an almost ideal septic tank for a high level of groundwater - Eurolos Grunt.
And if a complex installation?
Let's go back to the installation, if at the time of installation there is groundwater on your site, then additional efforts must be made to carry out the installation of the septic tank.
The production of formwork, various pits, rental of a motor pump for pumping out constantly arriving waters, additional labor, etc. are imposed.
In this case, the easiest way is to bury the smallest septic tank in height. Those. the smallest depth.
It is for such cases as installation in quicksand, as well as for any other complex soils, for example, rocky soil, there is a specialized station Eurolos Grunt.
Price Eurolos Ground
| Produce, m 3 per day |
Dimensions and weight | Gravity station |
Coercion water discharge |
Standard installation | |
|---|---|---|---|---|---|
| Evrolos GRUNT 3 | 0.6 , for 2-4 people | 149kg 1.5x⌀ 1.2x1.7m | 86000 rubles | 92000 rubles | rubles |
| Evrolos GRUNT 4 | 0.8 , for 3-5 people | 162kg 2.0x⌀ 1.2x1.7m | 91000 rubles | 99000 rubles | rubles |
| Evrolos PRIME 5 | 1 , for 4-6 persons | 188kg 2.5x⌀ 1.2x1.7m | 102200 rubles | 110200 rubles | rubles |
| Evrolos PRIME 6 | 1.3 , for 5-7 people | 223kg 3.0x⌀ 1.2x1.7m | 108000 rubles | 116000 rubles | rubles |
| Evrolos PRIME 8 | 1.6 , for 7-9 people | 267kg 4.0x⌀ 1.2x1.7m | 119000 rubles | 131000 rubles | rubles |
| Evrolos GROUND 10 | 2 , for 9-11 people | 325kg 5.0x⌀ 1.2x1.7m | 155000 rubles | 163000 rubles | rubles |
| Evrolos GRUNT 12 | 2.4 , for 11-13 people | 359kg 6.0x⌀ 1.2x1.7m | 167500 rubles | 175500 rubles | rubles |
| Evrolos PRIME 15 | 3 , for 13-17 people | 409kg 7.5x⌀ 1.2x1.7m | 195000 rubles | 203000 rubles | rubles |
| Evrolos GRUNT 20 | 4 , for 18-22 people | 492kg 9.0x⌀ 1.2x1.7m | 245000 rubles | 253000 rubles | rubles |
| Evrolos GRUNT 25 | 5 , for 23-27 people | 560kg 11.0x⌀ 1.2x1.7m | 295000 rubles | 303000 rubles | rubles |
| Evrolos GRUNT 30 | 6 , for 28-32 people | 636kg 13.5x⌀ 1.2x1.7m | 370000 rubles | 378000 rubles | rubles |
The aeration unit Eurolos Grunt, with the lowest housing height on the market, requires a burial of only 1.5 meters from the ground, which greatly facilitates its installation.
The cylindrical body with large lugs, a minimum of external seams and seven internal chambers provide the most robust construction in the segment of local treatment facilities, and installation does not require anchoring or a concrete slab.
Company Trans-Unit will help organize the sewerage system of a country house in short time and by pleasant prices in Moscow.
The septic tank is a completely unique structure. It knows how not only to accumulate waste for some time, but also to clean it, and even dispose of it. Therefore, these devices are superior in comparison with conventional drain pits.
Many people would like to install this equipment on their site. But they don't know which model to choose. For example, there is a special septic tank for high groundwater. What is its advantage over others?
An elevated water level is a common phenomenon in Russia. Water can be found by dropping only 20 cm deep. This is a difficulty, but there are sewage systems that are not afraid of this, and they are able to cope with this problem.
Below are the models that are ideal for areas with high groundwater levels.
Septic tanks catalog for high groundwater
Purpose:
Number of conventional people: 5
Volley Dump: 210
Processing volume, m3 / day: 1
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Model price:
US $ 899 -5%
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Purpose: for high groundwater levels
Number of conventional people: 2
Volley discharge: 200
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Model price:
US $ 890 -5%
Turnkey price: See the estimate
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?The most popular septic tank based on the results of 3 months of sales, with only positive customer reviews.
Purpose: for high groundwater levels
Number of conventional people: 6
Volley Dump: 270
Processing volume, m3 / day: 1.3
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Model price:
RUB 85,500 -5%
Turnkey price: See the estimate
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Purpose: for high groundwater levels
Number of conventional people: 5
Volley Dump: 390
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Model price: RUB 90 100
Turnkey price: See the estimate
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Purpose: for high groundwater levels
Number of conventional people: 5
Volley Dump: 250
Processing volume, m3 / day: 1
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Model price: RUB 90 800
Turnkey price: See the estimate
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Purpose: for high groundwater levels
Number of conventional people: 5
Volley Dump: 250
Processing volume, m3 / day: 1
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Model price: RUB 93,000
Turnkey price: See the estimate
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Purpose: for high groundwater levels
Number of conventional people: 5
Volley discharge: 200
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Model price:
US $ 950.00 -10%
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Purpose: for high groundwater levels
Number of conventional people: 2
Volley discharge: 200
Processing volume, m3 / day: 0.5
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Model price:
US $ 1,195 -5%
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Purpose: for high groundwater levels
Number of conventional people: 5
Volley discharge: 200
Processing volume, m3 / day: 0.75
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Model price:
RUB 88,200 -10%
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Purpose: for high groundwater levels
Number of conventional people: 5
Volley Dump: 320
Processing volume, m3 / day: 0.9
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Model price: RUB 99,450
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Purpose: for high groundwater levels
Number of conventional people: 5
Volley Dump: 390
Processing volume, m3 / day: 0.9
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Model price: 102,000 rubles
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Get free consultation
Purpose: for high groundwater levels
Number of conventional people: 5
Volley Dump: 250
Processing volume, m3 / day: 1
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Model price:
RUB 89,250 -15%
Turnkey price: See the estimate
Get free consultation
Purpose: for high groundwater levels
Number of conventional people: 3
Volley Dump: 250
Processing volume, m3 / day: 0.75
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Model price:
US $ 100.00 -5%
Turnkey price: See the estimate
Get free consultation
Purpose: for high groundwater levels
Number of conventional people: 5
Volley Dump: 320
Processing volume, m3 / day: 0.9
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Model price: RUB 106,000
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Purpose: for high groundwater levels
Number of conventional people: 8
Volley Dump: 370
Processing volume, m3 / day: 1.6
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Model price:
RUB 100 700 -5%
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Purpose: for high groundwater levels
Number of conventional people: 7
Volley Dump: 550
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Model price: RUB 113,000
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Purpose: for high groundwater levels
Number of conventional people: 7
Volley discharge: 500
Processing volume, m3 / day: 1.2
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Model price: RUB 117,000
Turnkey price: See the estimate
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Purpose: for high groundwater levels
Number of conventional people: 3
Volley Dump: 250
Processing volume, m3 / day: 0.75
Add to comparison
Model price:
US $ 1.655% off
Turnkey price: See the estimate
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Popular manufacturers of septic tanks for high groundwater levels
The autonomous septic tank Topas is well suited for areas with high groundwater levels. It is he who is chosen by many owners of suburban areas. The point is in the variety of advantages of this equipment:
- Natural recycling of waste;
- No sounds;
- Does not require pumping;
- No unpleasant smell;
- Installation, both during the construction of a house and after its completion;
- Service life from 50 years;
- Works at any temperature;
- Acceptable cost.
Also suitable devices can be found in the Unilos Astra range. Their features are as follows:
- The septic tank combines 2 types of cleaning: mechanical and natural. Thanks to this, waste treatment reaches 95%;
- No unpleasant odors;
- The entire system weighs very little, which makes it easy to ship and install;
- The body of the septic tank is made of ecological waterproof material;
- Acceptable cost;
- Does not require pumping;
- Shelf life of 50 years.
Septic tanks Eco Grand have a biological systemic waste treatment. You can use them both regularly and periodically. This does not in any way affect the degree of waste treatment.
System advantages:
- Waste pumping is not required;
- No unpleasant smell;
- Made of durable material, environmentally friendly;
- It can be used all year round, regardless of the ambient temperature;
- Long service life.
Why autonomous septic tanks should be chosen for high groundwater
When you have to choose a septic tank for the country, a high level of groundwater can become a hindrance. Therefore, experts recommend choosing not storage systems, but autonomous ones.
The choice is made based on how many people will need to be served. For example, if in a country house they live only in the summer and no more than 3 people, you can purchase a septic tank with a tank with a volume of up to 5 cubic meters. It is clear that for continuous use of the device throughout the year or for a larger number of people, you need to choose a system with a large tank volume.
Important! Most importantly, with a high level of groundwater, that the system has a forced discharge of water. In other words, you should opt for septic tank models with a pump. Due to this, the treated water will be discharged to the surface of the soil, which means that groundwater will not enter the device.
In addition, you need to pay attention to the following factors:
- The body of the septic tank must be made of durable and durable material;
- The device should be lightweight;
- The system should be easy to install.
When choosing, it is important to seek advice from specialists. They will be able to advise a septic tank adapted to the Russian climate, cleaning waste up to 98%, without an unpleasant smell and sounds.
Some people do not want to install septic tanks on the site just because they do not want to spoil the appearance of the area. However, specialists found a way out of the situation here. After installing the cleaning system, you can give it the appearance of a beautiful alpine slide! And the problem is solved.
Important nuances:
- It is advisable to install a septic tank at a distance of at least two meters from a residential building;
- If it is installed at a distance of 15 meters from the house and further, it must be equipped with intermediate wells;
- Install from a drinking water source at a distance of 15 meters.
Only a specialist can take into account all the important points. Therefore, do not engage in amateur performances. It is necessary to involve professionals in the installation of a septic tank!
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Installation of a septic tank at a high groundwater level (GWL) is a rather complicated, but possible procedure. Before starting construction work, it is important to find out the exact value of GWL, for this you can use both professional and folk methods.
Based on this parameter and the required volume of capacity, septic tank models should be selected. It is best to install ready-made factory designs.
They are more expensive, but they differ favorably in terms of service life and the need for less effort during installation.
How to accurately determine GWL
There are several ways that you can determine the level of groundwater. The most effective and simple one is to contact a special organization that conducts geological examinations.
As a result, the site owner will receive a detailed GWL report, on the basis of which subsequent construction work can be designed. However, this is a rather expensive procedure, so it is not suitable for everyone. There are other methods of self-determination of the level. These include the following methods:
- by means of a drilling rig;
- by flora;
- by nearby water sources;
- old folk technique;
- by signs.
For the first method, you will need a garden drill and a rod with a length of more than 2 meters. The rod should be marked with a tape measure at 10 cm intervals. Then you will need to dig a hole to the maximum length of the drilling tool.
Sometimes water comes out immediately during drilling, but most often you need to wait a day for it to appear there. The rod is lowered to the entire length of the well, and then it is removed and the level to which the water has reached is checked.
A similar procedure must be repeated several more times, fixing the obtained marks. If the results differ, then you need to take the minimum option. For the objectivity of the check, it is advisable to carry out the procedure in autumn or early spring, when the depth of groundwater is minimal.
You can also find out the GWL by the vegetation, which develops in the area without additional irrigation. In the image below you can find the most common plants.
The free growth of sorrel and currant bushes can also indicate the close location of water. By the angle of inclination of birch, maple and willow, you can find the place of the minimum depth of groundwater.
Quite often there are water sources in the immediate area: wells (even small ones, dug for irrigation), reservoirs, etc. By their depth, you can also come to the desired conclusion. The presence of marshy water bodies also testifies to the high level of groundwater.
You can always find out about the waters from the owners of neighboring plots., it is likely that they carried out expertise in the construction of houses, construction of septic tanks or connection to the central sewerage system.
There is also a popular method: remove the top layer of soil from a small area, put fat-free wool, on top of it a fresh egg. This composition is then covered with ceramic dishes and left untouched overnight.
Then they take it off and check the items. If the coat is slightly wet and there are no drops on the egg, the level is low. If drops are present on the egg, then the GWL is high. However, this method will not help you find out the exact value.
The high moisture content of the soil may be indicated by the abundance of midges, mosquitoes and other insects; the minimum number of rodents and anthills; love of cats for such places; presence of fog and dew in the morning even in hot weather.
Problems arising from high GWL
With such a feature, the site owner will face difficulties:
- the complexity of installing a septic tank with a high level of groundwater. Despite frequent assurances from sellers, this procedure will take a lot of time and resources;
- it is necessary to immediately design a septic tank with drainage, otherwise the nearby area will turn into a swamp;
- the possibility that the sewer system will be completely flooded, because new water is continuously supplied;
- attention must be paid to mounting the base and securing the septic tank with cables or fastening straps. If this is not done, then the storage septic tank will rise at a high level of groundwater, as a result of which sewage will enter the site, and the integrity of the system will be violated;
- it will be necessary to use special materials for the construction of the sewage system and ensure its tightness. For example, the use of concrete rings can cause liquid to seep through the walls;
- when runoff water gets into groundwater, it will spread quickly enough over the area. As a result, it will be impossible to use water from the well, and the nearest reservoirs will begin to bloom. Because for the accelerated decomposition of sewage, a large number of bacteria live in the septic tank, if they enter the food or water of a person, they can lead to indigestion, as well as to various infections and diseases;
- when the septic tank overflows, drainage fluids can go in the opposite direction, as a result of which pipes will burst. Fine sand and other elements will pass along with the liquids, which can provoke damage to the material of the pipeline and plumbing, which will require repair or replacement of devices located in the house.
TOP 10 manufacturers of septic tanks for high GWL
According to customer reviews, one can single out the TOP of the best manufacturing companies of autonomous sewerage systems with an increased level of groundwater:
- The septic tank "Tank" is designed in such a way as to prevent the structure from floating up. Designed for large volumes of liquid, copes well with temperature changes. The models are made of plastic, do not require external energy sources and have 17 mm walls.
- "Leader". 6-chamber septic tanks with aeration and airlift. Do not require additional use of bioactive drugs.
- "Leopard". There are models that require and do not require power supply. 3-chamber septic tanks with 2 levels of wastewater filtration. They are distinguished by their durability and the possibility of long-term operation.
- "Yubas". The main difference between these models is that they can be used intermittently for up to 3 months without reducing the efficiency of functioning. Ideal for suburban housing.
- Ecopan. It is considered the best septic tank for installation with a high level of groundwater. Models are able to withstand heavy loads without losing performance.
- "Tver". They require an additional power supply and regular maintenance, but they have a large capacity and cope well with large volumes.
- "Triton". The septic tanks must be anchored with nylon cables or chains. They have a long service life.
- "Topas". These stand-alone models are known for their high reliability and durability. Made of modern high quality materials with increased wear resistance. In this article, you can do more.
- Unilos. Filtration and drainage of waste fluids in a septic tank is carried out in several stages. The models do not require complex maintenance and are completely safe for the ecological situation of the area.
- "Poplar". They are resistant to temperature drops and external pressure. Septic tanks have aeration, compressors, airlifts. You can eliminate drains manually or using special sewage equipment.
Choosing a place for a septic tank
To determine the optimal place for the construction of a septic tank, you should study the current rules and regulations. There are several conditions that must be taken into account:
- the septic tank should be at a distance of at least 5 meters from the house or any building ();
- the road zone should be located at a distance of 5 meters;
- sewerage and aeration station should be located at a distance of 30 meters from an open reservoir or reservoir and 50 meters from a well with drinking water.
Which septic tank to choose for the site
The choice of a suitable model primarily depends on the required volume. Typically, three times the daily volume of liquids from home is used as a rough estimate. Most often, ready-made septic tanks are used for construction in a suburban area, or they are assembled directly during installation with self-sealing.
Sometimes the owners decide to install a surface sewerage system that does not depend on groundwater. However, this decision is associated with certain difficulties, since it will be necessary to install numerous pumps, and for such a septic tank you need a lot of space on the site.
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Despite the rather high cost of this type of system, the absence of the need for the services of sewers allows the price to pay off within several years.
Soil heaving is another potential problem. This process involves an increase in the volume of the earth due to freezing when the water in the ground becomes ice. The higher the GWL, the more pronounced this property is.
To prevent the negative consequences of heaving, a mixture of sand (5) and cement (1) should be used. During the construction of a septic tank with a high level of groundwater, a small space is left between the two walls (about 15-25 cm). In the resulting "pocket" it is required to fill and tamp the mixture, diluted with water, layer by layer.
When falling back asleep, water is poured in parallel so that both levels coincide. This action will protect the septic tank from cracks and other damage.
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However, sometimes it is impossible to postpone construction for various reasons, so you need to immediately solve the problem. To do this, most often the incoming liquid is scooped out in parallel with the digging of the pit.
As a rule, sewage equipment is used for this. You can also use a conventional hose with a mechanical pump, but it must be large in diameter to pump out water with small stones, sand and other elements.
To simplify pumping, it is recommended to first dig a trench at the lowest point, then start digging the rest of the area. This will lead to the fact that in the process all the water will be collected in one place, from which it can be easily pumped out with a pump.
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However, all of the above recommendations apply only to manually creating a pit. If this process is carried out using special equipment, then a quick digging will not allow a large amount of liquid to get into the trench, therefore, this will not interfere with the implementation of construction work.
To ensure the stable and effective functioning of a septic tank in a country house or in a private house with a high level of groundwater, you should follow some tips:
- large waste and durable garbage should not be dumped into an autonomous sewer;
- the entire system must be properly insulated and waterproofed;
- if there is no drainage, then it is required to independently pump out waste liquids manually with a sewer pump or using the services of a sewer;
- it is advisable to install grease traps on the plumbing (especially in the kitchen), which will prevent fat from entering the septic tank. It is the formation of a fat layer and sludge on the walls and bottom that is the main reason for the rapid filling of the container;
- if there is a biological cleaning stage, it is forbidden to use strong chemicals for cleaning plumbing fixtures. Also, it is impossible to prevent alkalis, acidic substances, alcohol from entering the septic tank by other means, because they are able to destroy beneficial microorganisms that process sewage.
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Installing a septic tank with a high GWL is a serious procedure that requires a lot of time. It is important to choose the right material of manufacture and type of construction, to determine how many chambers and what capacity is needed.
Before starting installation, you need to know exactly the level, the depth of the groundwater, this can be done with a drilling device or in another way.
A high-quality septic tank with a high GWL is able to work without problems for many decades.
The optimal season for determining the level of groundwater is spring or autumn. Snow melts in spring, and in autumn - the longest heavy rains.
Determine the level of groundwater
In order to independently calculate how deep the underground waterways flow, you must use the following inventory:
- garden drill with a length of at least 200 cm;
- long and durable rod (if there is an opportunity to choose, it is better to have a rod made of wood);
- spoon drill at least 500 cm long.
Note. Sometimes, in order to make the most accurate calculations, 2 or more wells may be needed. At the very least, it will make it easier to track the approximate level of the waters under the ground.
You can start drilling a well. The water layer closest to the surface is located no deeper than 4-4.5 m. Sediments and melt water serve to form this layer. It is partially or completely absent in areas with an increased level of drought or prolonged frosts.
Due to their proximity to the surface, these waters cannot be called the cleanest. They contain a huge amount of impurities that penetrate the soil along with rainfall. Impurities include not only various kinds of pollution, but also bacteria, which, after entering the human body, can cause gastrointestinal disorders, diarrhea, and so on. Therefore, such waters are used exclusively for irrigation.
But the groundwater is located much lower: on average, at least 8-9 m from the soil surface. Therefore, the farther the site is from the natural source of water, the deeper you will have to drill.
After the wells have been drilled, they are left for at least 24 hours. This is necessary so that liquid gets into the well, over time, the level of which is measured with a wood rod. You can use iron or aluminum, but this is not very convenient, because:
- First, because when wet, the iron does not change color, as happens with a wooden rod;
- Secondly, iron is, in principle, heavier than wood, and therefore, depending on the original length of the rod, it will be extremely difficult to manipulate it.
In order to calculate the approximate location of groundwater from the surface, you can use the signs of our ancestors. For example, if lingonberries with blackberries have gone into dense growth, it means that an underground water artery flows near the surface - no deeper than 70-80 cm.While for a cherry, apricot or cherry plum tree, an average depth of 150-160 cm will be optimal.
How septic tanks work
There are a number of models of septic tanks for a private house, which differ depending on certain modifications.
Accumulative septic tanks: principle of operation
Accumulative septic tanks are divided into:
- concrete;
- metal;
- polyethylene;
- made of fiberglass.
Such systems are convenient for location in small areas where the stock volume of underground flows does not exceed the “below average” bar. The septic tank accumulates waste water and is pumped out using a sewage machine. On average, the number of pumpings does not exceed 3-4 times a year. But depending on the relief and certain geographic features, the number of requests for sewage services can increase or decrease by the n-th number of times.
If the soil flow is strong enough, then using a septic tank with a sufficiently low weight (polyethylene or made of fiberglass) is not recommended. The reason is simple - such devices will simply be pushed out of the soil over time, even the weights laid on top of the storage device will not be able to hold.
However, if there is a high level of groundwater with a low flow rate, it is better to use a polyethylene septic tank. Such a choice of a septic tank will solve a lot of problems with its transportation and subsequent installation, as opposed to concrete or metal. These two options, including a concrete septic tank at a high water level, although they are quite heavy, are able to withstand strong flows of underground waterways.
Note. Septic tanks made of polyethylene are the most sealed and can live a significantly longer operational life, in contrast to summer cottages made of concrete or metal.
Given the strict law on sanitary standards for the arrangement of cesspools, there can be no better alternative than storage septic tanks for summer cottages with a high level of groundwater. Thus, in an area where groundwater is high enough to the surface of the earth, a storage septic tank with a high groundwater level will be the best solution.
Septic tanks with mandatory filtering fields
Such models with sewage filtration for high groundwater levels are especially relevant for summer cottages. It is they who purify water and are the key link in the sewer system. The filtration field is a layered structure of sand cushion, crushed stone and irrigation pipes. In addition, it is easy to make it yourself, even for a reinforced concrete structure made of rings.
It is easy to determine the area of \u200b\u200bthe filtering field, it is enough to know the following indicators:
- the exact area of \u200b\u200bthe land plot where it is planned to install a septic tank for a summer residence with a high level of soil flows;
- how much water is filtered daily, weekly, quarterly and annually;
- in which seasons large volumes of fluid flow;
- in which seasons the minimum volumes of flowing fluid are supplied;
- what septic tank in terms of capacity: tank volume (rings or plastic - for each system, the reservoir parameter is required).
DIY filter field
How to make a septic tank if the groundwater is close? Due to the large volume of work, special equipment will be needed to set up a filtering field, because it is almost impossible to manually dig trenches of about 20-25 meters and a depth of at least 1 meter.
- It is necessary to determine the location for the future installation. The minimum distance that you need to retreat from any structures and natural wells is about 14-16 meters;
- Based on the area of \u200b\u200bthe site and the area on which it will be possible to deploy, the area for the filtration field is calculated, the minimum area of \u200b\u200bwhich should not be less than 15 square meters. For a more accurate calculation, it is recommended to contact a specialist;
- Next, you need to dig up trenches. A prerequisite if the average indicators match:
- depth not less than 1 meter;
- the width of each strip is not less than half a meter.
Important! If a depth of less than 1 meter is taken, then it will be necessary to increase the cost of warming the filtering field in winter.
- The first layer is a sand cushion, at least 30 cm thick;
- The next layer, with which the trench is filled up, is of gravel, also at least 30 cm thick. The thicker the filtration layer, the cleaner the water will flow;
- A drain pipe is laid on top of the crushed stone;
- The final layer is crushed stone, at least 10-15 cm;
- The entire system is covered with a geotextile film, which will help to ensure that the autonomous cleaning system does not freeze in especially severe frosts.
Note. The use of geotextile film will also avoid silting, which will significantly extend the operational life of the septic tank installation.
Aerobic septic tanks: which is better
The question "What is better to choose an aerobic cleaning system in a private house?" asked every second owner of suburban housing, whether temporary or permanent. The aerobic septic tank for high groundwater guarantees a high percentage of purification - at least 98%. Such a system will ideally fit into the everyday life of home ownership, where previously there was no permanent sewage system, and you do not want to lose the quality of life.
Of course, if you use a septic tank with high groundwater, you will have to ensure its long service life. But usually several pumpings of a septic tank are enough at a high level of flows by a sewage machine per year (depending on the number of regular users).
The septic tank device belongs to environmentally friendly models. Septic tanks for summer cottages with a high groundwater level are relevant for owners of suburban real estate, who spend less of their time outside the city and rarely use an autonomous sewage system with an aerobic method of purification.
Disadvantages of the model:
- Most models are directly dependent on electricity, therefore, it is not always possible to use such an installation;
- If the system comes out of a failure, expensive repair of the installed device will be required;
- High cost of parts (in case of failure due to power outages, it does not pay off, despite the almost 100% rate of purity of fluid flows).
The advantages of the purification system:
- The installation of a septic tank implies an almost silent operation of the device (which cannot be said about other models);
- Deep cleansing of the soil;
- The ability to use purified water in domestic conditions (98% is an indicator comparable to the level of purification of running water);
- If there are no power outages, a septic tank with a high GWL can work for about 5 years without any human intervention, including pumping out by a sewer;
- The system is installed in any soil, it is not pretentious, moreover, it is sufficiently tight and durable.
TOP-6 models 2016-2017
- Official dealer in Russia EKO-DACHA (septic tank in the area with a high groundwater table Topas);
- Manufacturer of treatment facilities Eco-Grand (septic tank for summer cottages with a high level of soil grade "Topol").
- Moscow manufacturer "Bioxy" - installation of a septic tank of this brand will not take a long time due to the lightness of the plastic structure;
- Triton-Plastic LLC is a world-famous manufacturer, the best among autonomous stations is a septic tank "Tank", after which a septic tank made of concrete rings looks less effective at a high level of groundwater.
- According to Internet research and user polls, DKS-Optimum occupies a leading position among inexpensive devices with a high level of cleaning from pollution;
- The installed Elgad brand septic tank for high groundwater is in better demand for a large number of users, unlike other analogues in this price category.
The rating was compiled by the number of search queries, as well as according to Internet surveys of users of autonomous sewers, for summer cottages and private houses with the inability to connect to the central sewage system. In most of the leading positions are models of famous brands with a small tank volume, as well as with additional filtration for the possibility of further use of purified water in domestic conditions.
For example, Elgad C 1400 is in great demand among summer residents with a small plot, while the volatile septic tank, which won the majority of votes in its category, EKO-Grand 15, has a six-cubic capacity and good performance (a good system can handle about 2 cubic meters per day, which is especially true for a large site with more than 7-9 permanent users).
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When soil waters are located at a depth of about a meter from the surface of the earth, this does not allow the placement of ordinary treatment facilities, and septic tanks are required for high ground waters. To determine the depth, it is enough to check the site with a garden drill. It is advisable to do this in 3-4 places. After that, you will need to choose a suitable cleaning system.
When groundwater comes close to the surface, and sometimes its occurrence can be located even at a distance of 30 cm or less, many homeowners have no idea how to properly install treatment equipment on the site and what it should be.
Features of the installation of the structure:
- The septic tank should be mounted on an absolutely flat surface;
- It is considered mandatory to install the system on a concrete cushion and secure it securely with cables, ropes or belts, otherwise it may float and be damaged;
- The body of the equipment must be firmly sealed, especially for devices made of concrete rings - this way you can avoid water seepage;
- Also, poor tightness of the installation can lead to the flooding of the model and contamination of soil water with waste from sewer pipes.
Measurement of the high groundwater level should be done after spring floods or in autumn, when the rains end.
In the Middle Lane, the problem of GWL refers to many territories and sections of the suburban sector, so you will need to choose high-quality equipment for cleaning the sewage system.
How to choose a summer cottage sewage system with a high level of groundwater
Of course, you can use homemade fixtures made of concrete, brick and other materials, but this approach is unlikely to ensure the complete tightness of the structure.
This further threatens to cause serious problems associated with the poisoning of groundwater by waste and flooding of the equipment case.
It is better to choose the optimal modification corresponding to the position. Special septic tanks are well adapted to the swampy area, designed to work with GWL.
You can solve this issue in the following way:
- For a summer residence or a private house, you can choose a small model of industrial production, the rating of such modifications is very high.
- You can design your own modification from eurocubes - special containers with a plastic container inside.
- Dacha sewerage in an area with a high groundwater level necessarily provides for the installation of a heavy concrete cushion with iron elements for a septic tank. It is even better to make a concrete well without seams, which will provide protection against the ingress of sewage into the ground.
For a well, you will need to dig a pit, install formwork, fittings and pour concrete.
Construction stages: how to make a septic tank if the groundwater is close
A high level of soil water is not an obstacle to the construction of a sewerage system.
When self-erecting a sewage treatment plant, the most important is:
- Absolute body tightness;
- For the strength and weight of the structure, you will need to make a reinforced concrete pillow at the base;
- The freezing point of the soil must be taken into account.
Filtration and storage chambers are made of metal or plastic cubes, concrete rings.
Work order:
- The location is determined - the cesspool should be located 5 meters from the housing;
- A pit is being dug, the walls of which are reinforced with any wood material;
- A layer of waterproofing is placed at the bottom and a concrete solution is poured;
- After drying, another layer of waterproofing is laid, on which a septic tank is placed, while groundwater should be pumped out;
- Next, a ventilation pipe is collected, which is necessary for removing methane;
- The structure must be buried;
- The equipment cover is erected, equipped with ventilation.
The structure will be reliable with maximum stability. This point needs to be given special attention.
Advantages of a concrete septic tank with a high level of groundwater
Pat UGV often forces you to look for optimal solutions for the construction of an autonomous sewage system in a private house. Unlike such materials for the body of a septic plant as metal, plastic, reinforced concrete rings, monolithic concrete is more practical, since it allows you to build equipment of any size.
The main advantages of a concrete well are:
- The material is not subject to corrosion, decay, calmly tolerates critical temperatures, is not afraid of small animals and insects;
- The seamless design is perfectly sealed and does not allow contamination to penetrate into the groundwater;
- A concrete septic tank is the best because it is heavy, it is excluded from floating.
Concrete is the cheapest material; therefore, construction will not require large financial investments, which is also important.
Septic tanks for high groundwater (video)
In the countryside, especially if there is no central sewage system, the presence of aeration septic tanks is simply necessary. If a summer cottage or the territory of a private house is located in a swamp, this is not yet a reason to be upset. A home-made concrete septic tank or high-quality factory equipment for sewage treatment will help to provide housing with the normal operation of an autonomous sewage system, and cleanliness, order and comfort will reign in the house for a long time.