How to build a storm sewer well

Firms producing plastic wells for drainage, and approximate prices

There are a lot of companies providing plastic tanks for the drainage system to the Russian market. And this number is constantly growing. However, the market is dominated by 2 firms that are most popular with consumers.

"Polyplastic"

This is one of the leaders among Russian manufacturers of plastic products. The company produces a full range of wells used in drainage systems. The range includes welded containers. Their tray options can be used for installation on bends, crossing pipelines and for system revision. Trayless products can be used as storage tanks.

The company produces drop tanks, storm water wells, as well as prefabricated tanks of various diameters. The cost of a welded well shaft is about 1,700 rubles per meter for a tank with a diameter of 40 cm, a tray of this size costs from 2,300 rubles, and a telescopic neck from 6,000 rubles.

Feedback: I purchased Polyplatic products for the revision of the drainage system. There are no problems in the collection, during operation, too. Satisfied

The only negative is that during the selection process I could not find the price, which is important for product monitoring.

Wavin

This European company, which is a leader in the production of plastic products for sewerage, including drainage systems, produces prefabricated manholes with a diameter of 315, 425, as well as larger models Wavin Tegra 600 and 1000. All of them consist of a corrugated shaft, a telescopic neck , hatch and tray with nozzles.

The price for a shaft with a diameter of 425 mm ranges from 7,000 to 21,000 rubles, depending on the length. A tray of this type can cost at least 5,000 rubles.

Review: The well of the company Vavin has been serving for more than 5 years. We are very pleased with the quality, the tank withstood temperature changes without problems. True, the prices bite.

Device and installation features

You can install a plastic drainage well on the site without specialists. For installation, you will need 1-2 assistants, mainly to release the container to the bottom. But before that, it is necessary to make preparatory work.

With a monolithic product, everything is simpler, it is almost ready for installation. Collapsible finished products must be assembled according to the instructions. And if you decide to make a tank from a large diameter pipe, then first you need to cut it to the required length.

In finished products, there are often holes for pipes, and in home-made ones, they are pre-cut in accordance with the diameter of the drains. Rubber seals and plastic couplings are inserted into the holes. All seals are lubricated with sealant to prevent leakage.

After that, they begin to dig and prepare the pit, taking into account several parameters:

The depth should be such that the entry points of the pipes pass below the freezing point of the soil, and the bottom of the tank is at least half a meter above the groundwater level.
You also need to take into account that at the bottom of the pit a pillow of crushed stone 15-20 cm high will be covered.
The width of the pit is 40-60 cm more than the diameter of the container.
The hatch after will have to rise 10-15 cm above the ground.

After the pit is dug, its bottom is leveled, and then they fall asleep and level the crushed stone pillow.

If the area is characterized by a seasonal rise in groundwater, then an additional cement base must be poured onto the bottom.

After the cement has hardened, you can install:

The tank is released to the bottom.
Use a level to check if the container is level.
Connect the pipes for the drainage well to the nozzles. Be sure to treat all joints with sealant.
The tank is backfilled with sand and gravel.Do this in layers, each layer is carefully rammed.
Install a plastic cover (hatch).

This completes the installation. If necessary, a drainage pump is released into the collector.

Installation video of the Wavin Tegra 1000 well:

Varieties of drainage wells according to their functions

When arranging the drainage system, several types of tanks can be used, which differ from each other in their function and have design features.

Manholes have a hard bottom, they are necessary for revision and cleaning of the drainage system. They are installed every 20-30 meters on a straight pipeline and on pipe bends. Therefore, they often perform the role of rotary, which is facilitated by the presence of several inlet pipes located at different angles. At least 2 pipelines enter such a container. Unused openings are hermetically sealed with special plugs.
Storage tanks are designed to collect water and are installed at the end of the drainage system. These are completely sealed tanks, into which drainage pumps are sometimes released to empty the tank. The water accumulated in the tank can be used for technical needs. Drainage tanks are recommended to be equipped with silt inlets, so the pipes enter the tank at a height of at least 15 cm from the bottom. The inlet pipe is equipped with a valve that prevents the reverse flow of water into the system.
Accumulation tanks are connected in some cases to an absorption well, which has no bottom. This is a variant of soil filtration. A filter is installed at the bottom of the tank.
In regions where at least seasonally there is excessive saturation of the soil with groundwater or atmospheric water, in some places there is an overflow of pipes and an increase in pressure in the drainage. To combat this phenomenon, expander wells are installed in particularly difficult places, which extinguish the fluid pressure in the system. The principle of operation is that water and a narrow pipeline under natural pressure enters a large reservoir. Due to this, as well as the presence of special energy-damping structures inside the tank, the flow rate and pressure in the network drops.
In places where pipelines run at different depths, overflow wells are installed. Such containers are needed where there is a large difference in the height of the relief. Branch pipes in them are located at different levels. In some cases, such containers are used as a collector, which is connected to a pipeline that evacuates the water collected from the site into a reservoir, ravine, etc.
Storm wells are used in storm systems, which differ from drainage primarily in the depth of the gutters. A drainage well is also used in the storm drain.

Ready-made drainage wells differ not only in their functions, but also in their design features.

Self-installation of drainage wells

Consider how to make a drainage well with your own hands. Depending on the type of well, the methods of its manufacture also differ.

Installation of a storage well made of plastic

The material for the manufacture of such a well can be a corrugated plastic pipe of various sizes.

Important: It is necessary to install wells of this type below all drainage pipelines, ensuring unhindered flow of water to them. one

Digging a pit for a future reservoir

1. A pit is dug for the future tank.

2. The required length of the corrugated pipe is measured, after which it is cut.

3. A sand cushion is poured into the pit or a solid concrete base is created.

4. A prepared container is installed in the prepared pit, which has branches for connecting pipes. Holes for inlet pipes can be made after the container has been installed in a permanent place.Many ready-made wells already have special taps, so connecting them to the drainage system is not difficult.

5. Using bituminous mastic, a plastic bottom is glued to the pipe.

6. Drainage pipes are introduced into the well and the cracks are sealed.

7. The gaps between the walls of the well and the pit are covered with rubble, sand or a mixture of sand and cement.

Tip: It is advisable to immediately place a drainage pump inside the well. through which water will be pumped out. You can also use a submersible pump, which will be lowered into the well manually, as needed, or a surface-type pump.

8. From above, the storage tank is covered with a lid to prevent its contamination, and on this the installation of the drainage well can be considered completed.

The do-it-yourself inspection-type drainage well is made in a similar way, except for installing the pump. Also, there is no need to place it at the lowest point of the site.

Installation of a well from concrete rings

For the manufacture of concrete wells, it is better to use reinforced rings with a lock. If they are not available, then ordinary concrete products will do. The thicker they are, the longer they will last.

The work is carried out using special loading equipment in the following sequence:

1. A pit of the required size is being prepared.

2. Sand or gravel is poured into the bottom of the pit. If a filter container is made, then the thickness of the pillow must be at least half a meter.

3. The first ring with the bottom is placed on the pillow. If rings without a bottom are used, then a concrete screed is made from the bottom of the first ring.

4. The next rings are stacked on top of the previous ones. When installing concrete rings, the joints between them are sealed with concrete mortar or bituminous mastic.

5. When the last ring is installed, holes are made in it (if not already) for the entry of drainage pipes.

6. Pipes are led into the holes of the ring, after which all joints are carefully sealed.

7. A cover is installed on top of the well. You can use plastic or metal covers, as concrete products are too heavy.

8. The voids between the walls of the pit and concrete rings are filled with sand, gravel or crushed stone.

Arranging a drainage well is not a very difficult task. You can cope with such work yourself, especially when installing plastic products.

What materials are wells made of?

Drainage wells can be made from different materials that differ in their properties:

1. Concrete. This is a traditional material for the manufacture of drainage wells. The easiest way is to mount the structure of concrete rings, installed one on top of the other. The walls and bottom can also be filled with concrete, especially if the drainage well is made by hand. To do this, it will be necessary to design the formwork. Concrete is a durable and strong material, but with prolonged contact with water, it begins to gradually crumble and crack.

2. Brick. They lay out the walls of the well, the bottom of which is poured with concrete. Brick is less durable than concrete, but it is convenient to lay it even alone. It is rarely used for the manufacture of drainage systems.

3. Plastic (polymer) wells. They are increasingly replacing other materials used in drainage systems. Plastic containers have several advantages:

resistance to extreme temperatures. They can be operated in the temperature range of -60 + 50 degrees;
plastic is a light material, so the installation of such a structure can be carried out independently, without the involvement of construction equipment;
installing a drainage well made of plastic is quick and easy. If necessary, the material is easily cut to the desired size, which cannot be done with concrete rings;
inert to various aggressive substances;
they are not afraid of corrosion and oxidation;
have strength comparable to metal and concrete;
perfectly tolerate mechanical and hydraulic loads;
plastic containers do not rot, are not damaged by rodents and insects;
plastic containers can be placed at any depth and in soil with any structure;
The life of a plastic tank is about 50 years.

An example of a complete set of a finished plastic well for drainage

Most often, corrugated pipes of various diameters made of polyvinyl chloride are used as drainage tanks. A drainage inspection well, or having another purpose, made of such pipes, has sufficient rigidity to resist being pushed out of the ground by groundwater.

Advantages and disadvantages of PVC manholes

For several years now, plastic products have been at the forefront of water supply and sanitation, including stormwater and drainage systems. This is determined by a whole range of positive qualities of plastic products.

One of the main advantages is the relatively light weight. Installation and transportation does not require the use of special equipment and the organization of an entrance to the installation site. The container is very easy to install by 2-3 people.
Plastic is a sealed material that is not subject to corrosion. The service life of such products is about 50 years, and no maintenance is required.
Resistant to aggressive media and low temperatures.
High-quality PVC does not emit toxic substances into the soil, so drainage containers from it will not harm the ecological condition of the site.

Its disadvantage lies in the light weight of plastic products: such a container can easily float in watered soil. But this problem can be dealt with with the help of a concrete base, which is settled at the bottom of the pit and to which the well itself is attached.

Another often mentioned disadvantage is the high price. But if you remember that when installing a plastic tank, there is no need to hire special equipment, and the service life is several decades, it becomes clear that the cost will quickly pay off.

Design and purpose

Let's study in more detail the drainage well: what is it and what functions does it perform?

This structure is a reservoir of a certain size buried in the soil. The well consists of a shaft, an upper hatch and a bottom. Absorption-type structures have no bottoms. The well allows you to accumulate excess moisture coming into it from pipelines, control the degree of contamination of drainage pipes, monitor the degree of filling the drainage with water.

The drainage well on the site is the most important element, without which the drainage system would very quickly lose its functionality, silt up and cease to fulfill its purpose.

Types of drainage wells

There are several options for the execution of drainage wells, each of which performs certain tasks. Let's look at these types in more detail:

1. Observation (inspection) well. Its purpose is to inspect and clean clogged pipes. Such structures are not designed to collect water. Inspection wells for drainage of small diameter (up to 46 cm) are used to flush pipelines, while larger products with a diameter of 0.9-2 m allow people to go down inside to carry out cleaning activities. Inspection wells are installed at pipe junctions, as well as on very long straight sections of the drainage pipeline.

Rotary revision wells are often used, installed at the intersection of several drainage pipes, at corner points, as well as at pipeline bends.

In the photo, a rotary inspection well made of plastic

2.Collector (storage) well. It is installed when the soil in the area is clayey, not able to absorb a large amount of moisture. It is also used in cases where it is impossible to discharge excess moisture outside the site. The device of a drainage well involves the flow of water into it from the drainage system with its subsequent consumption for various household needs. These wells are sealed. There may be several such structures on the site. If the well is presented in the singular, several drainage pipes are fed into it at the same time.

https://youtube.com/watch?v=YXVIi7M1Yr8

The diameters of plastic pipes for the manufacture of such wells start from 57 cm. The deeper the tank is, the slower it will fill, and it is installed at the lowest point of the site, below the passage of the drainage pipes.

Drainage well with pump

3. Absorption (filtering) well. Its use is advisable in the case when it is not possible to withdraw drainage water outside the site or into the central sewer system.

Absorption well for drainage is usually more than 2 meters deep. At the bottom of the structure, a layer of broken brick, slag or gravel about 30 cm thick is poured, which contribute to the absorption of water into the soil. The upper part of the well is covered with geotextile, on top of which a layer of soil is poured.

Absorption wells are often arranged as the last stage of wastewater treatment after a septic tank.

The use of a filter well is justified on sandy and sandy loamy soils with a high absorption capacity.

Classification of underground drainage tanks by type of construction

On this basis, finished PVC tanks are divided into 2 categories.

Prefabricated wells consist of several elements that are connected to each other before installation:

main tray with nozzles;
shaft, which can be a corrugated or smooth pipe;
two sealing rings for connecting the body (shaft) of the well with a neck or tray;
necks;
plastic cover;
extension cable, the length of which may vary depending on the depth of installation.

Such tanks are more versatile, since the length of the shaft can be adjusted depending on the depth, but they are more expensive.

At the same time, it is important to take into account that with an increase in length, the resistance of the container body to compression decreases.

Monolithic containers are more durable and cheaper, but have a standard height, therefore they are designed for installation at a certain depth. True, the additional installation of the neck allows them to be deepened a little. Drop and expansion tanks are produced only in this form.

Monolithic and prefabricated products are produced both in Russia and abroad.

Types of drainage wells

There are several options for the execution of drainage wells, each of which performs certain tasks. Let's look at these types in more detail:

Rotary inspection wells are often used, installed at the intersection of several drainage pipes. at corner points, as well as at bends in pipelines.

2. Collector (storage) well. It is installed when the soil in the area is clayey. unable to absorb large amounts of moisture.It is also used in cases where it is impossible to discharge excess moisture outside the site. The device of a drainage well involves the flow of water into it from the drainage system with its subsequent consumption for various household needs. These wells are sealed. There may be several such structures on the site. If the well is presented in the singular, several drainage pipes are fed into it at the same time.

3. Absorption (filtering) well. Its use is advisable in the case when it is not possible to withdraw drainage water outside the site or into the central sewer system.

Tip: Use this type of wells if the total volume of wastewater in your area is not too large (up to 1 cubic meter per day).

Absorption wells are often arranged as the last stage of wastewater treatment after a septic tank.

The use of a filter well is justified on sandy and sandy soils. with high absorbency.

Tip: If the walls of the absorption well have gaps, it is recommended to lay a layer of geotextile on them, which will filter the water penetrating through them.

What materials are wells made of?

Drainage wells can be made from different materials that differ in their properties:

3. Plastic (polymer) wells. They are increasingly replacing other materials used in drainage systems. Plastic containers have several advantages:

resistance to extreme temperatures. They can be operated in the temperature range of -60 + 50 degrees;
plastic is a light material, so the installation of such a structure can be carried out independently, without the involvement of construction equipment;
installing a drainage well made of plastic is quick and easy. If necessary, the material is easily cut to the desired size, which cannot be done with concrete rings;
inert to various aggressive substances;
they are not afraid of corrosion and oxidation;
have strength comparable to metal and concrete;
perfectly tolerate mechanical and hydraulic loads;
plastic containers do not rot, are not damaged by rodents and insects;
plastic containers can be placed at any depth and in soil with any structure;
The life of a plastic tank is about 50 years.

Most often, corrugated pipes of various diameters made of polyvinyl chloride are used as drainage tanks.A drainage inspection well, or having another purpose, made of such pipes, has sufficient rigidity to resist being pushed out of the ground by groundwater.

If you are looking for the best dry closets for the home, prices, reviews and features of their operation are described in our separate material.

And we described the characteristics of the Brook pump here. It can perfectly cope with the pumping of water from storage tanks.

Types and arrangement of drainage wells

How to build a storm sewer well Filtering drainage well

All wells of the drainage system are classified according to their purpose:

Revision. Designed to assess the status of all communication. The observation shaft must have sufficient volume so that a person can go down there if repairs are necessary. More often, the revision is mounted on extended sections of the system (from 10 meters) or on its turns.
Variable. It is mounted in the event that the drainage system is arranged on a difficult terrain and the master fails to maintain its smooth slope in specific areas of the site. Has a sealed bottom.
Turning. A kind of revision well, designed for the device of sharp bends in the system.
Absorption (drainage). It is also often called a filter. As a rule, it is installed in the event that it is not possible to discharge accumulated moisture into the city highway. The absorption well is the end point of water removal from the site and is located in its lowest part. The filter shaft does not have a sealed bottom. Instead, a drainage cushion of rubble and pebbles is laid.
Cumulative (collector septic tank). This is a tank with a sealed bottom to collect rainwater. Subsequently, the liquid is either discharged using a pump into the nearest reservoir / ravine, or used for economic purposes (irrigation, watering).

Production material

Drainage wells made of concrete and plastic

For the manufacture of wells of the drainage system, two popular types of materials are used:

Plastic. The polymer is lightweight, which is convenient when installing the system in the country with your own hands. In addition, plastic (polyethylene, polypropylene) is resistant to aggressive environments, inert to temperature changes. And special rings in the corrugation of the polymer pipe play the role of stiffeners. That is, such a mine well resists seasonal heaving and is prone to linear stretching. It is worth considering that it is easier to work with plastic when forming holes for drains. Yes, and the polymer serves from 50 years or more.
Concrete. Strong, strong and durable material. A well made of concrete rings, even in very heaving soil, is firmly fixed. Due to the fact that the tank is assembled from separate elements, it is possible to mount shafts of different heights. Concrete serves no less than plastic. But when constructing a well, it is necessary to use special equipment, since the mass of the rings is impressive.

Careless work with concrete rings can disrupt the structure of the material. Concrete is capable of cracking under strong mechanical stress