When laying communications, instead of asbestos-cement and cast-iron wells, polymer ones are increasingly used, which have a lower weight and are easy to install. But these features are not a complete list of the benefits of such products.
However, to this day it is traditionally believed that structures for wells are better made from reinforced concrete. In most cases, drainage elements are made of this material. Even when designing new communications, it is planned to use it. This is due to a lack of information on the latest technologies that involve the use of plastic and its varieties.
Reviews of plastic wells
A plastic well for sewage has many advantages, among them are:
- ease of installation;
- high resistance to aggressive influences;
- ease of adjustment of the height of the head;
- excellent insulating properties;
- unlimited frost resistance;
- long term of operation;
- the ability to install smaller products inside the well;
- simplicity of the device base.
Lifting mechanisms, according to customers, will not be required during installation. The material is resistant to domestic wastewater, while reinforced concrete, although durable, is subject to destruction due to the acidity of the waste. During installation, the excess part of the head can be cut off with a hacksaw.
Products are plastic. They have good insulation and high environmental friendliness, which consumers like. For this reason, it is not necessary to apply additional waterproofing layers, which distinguishes a plastic well for sewage from reinforced concrete.
Polyethylene and polypropylene products provide almost complete protection against infiltration of effluents into the external environment. As users emphasize, no maintenance is required during operation.
Installation
A plastic well for sewage is installed without the use of heavy equipment. All structural elements are easily moved by two people. At the first stage, excavation work is carried out, which involves the preparation of the installation site. The structures have a small mass, so their installation provides for the arrangement of a less voluminous pillow.
If you plan to install a well with a loading chamber, the base is filled with a layer of crushed stone, then there is gravel. Materials are compacted. Additionally, a geogrid is used. The next step will be the installation of the well in place and its alignment.
If a loading chamber is provided, it should be filled with concrete. This measure is necessary to prevent expulsion of the structure by groundwater or by cycles of freezing and thawing of the soil. Collectors are brought to the well. Inside, pipes are connected and stairs are installed.
The technology provides for the installation of a well overlap and sprinkling. The next step will be the installation of the hatch. Such works take up to 20% less time compared to reinforced concrete structures.
Plastic hatches
A plastic hatch for a sewer well is usually compatible with polymer and cast iron products. The latter can have different weights, both light and heavy. Hatches can be equipped with locks.
The use of polymer does not affect the selection of the product. However, together with the described wells, it is better to use polymer parts, which are less expensive and more durable than cast iron.
Characteristics of different types of plastic wells: tray audit products
When considering plastic wells for sewage, you should highlight the most common. Among others, tray audit, which are installed in the places of branching and cornering of networks. They are necessary for pipe connections and their inspection, repair and maintenance.
Such wells can be designed for a specific number of turns or made universal. They got their name because of the tray part, which is present in the design. The tray is located under a slight slope and is necessary to prevent the accumulation of effluents.
Tray plastic wells have a small diameter, because for their full work requires a minimum of space. The inner diameter can be equal to a figure from 600 to 700 mm. The depth of the well reaches 13 m. The diameter of the nozzles is equal to a value from 100 to 300 mm. The wall thickness of the product can be equal to the limit of 20 to 30 mm. The distance from the bottom to the nozzle is standard and equal to 300 mm, as well as the length of the nozzle. Construction length is equivalent to 1260 mm.
Sediment Well Characteristics
If you are interested in the characteristics of a plastic well for sewage, then you should get acquainted with sedimentary products, which are the second most common. They are installed on pressureless collectors. Designs are containers, the walls of which are sewer pipes strengthened .
The bottom is located below the level of the pipe and acts as a sump and sediment collector. Such wells are installed in places of turns and branches, as well as at a certain distance of straight sections.
The inner diameter can be equal to a figure from 600 to 700 mm. The depth reaches 13 m. The diameter of the nozzles is equal to the limit from 100 to 300 mm. The wall thickness of the well may be 20, 25 or 30 mm. From the bottom of the well to the nozzles, a height of 250 to 700 mm is maintained. The volume of the sump is equivalent to 0.07-0.2 m 3 . The construction length of such a well is 1260 mm.
Characteristics of inspection wells. Consumer Reviews
These wells are designed for installation of locking and regulating devices and sensors. Products, according to consumers, are cameras that are leakproof and provide for the availability of pipe fittings, namely:
- hydrants;
- cranes;
- water gauge nodes;
- gate valves.
Read reviews of plastic sewer wells and looking at inspection products in more detail, you can note that they are medium in size and complemented by stairs that provide access for repairs. The inner diameter has a wide take-off and is equal to a figure from 1000 to 2200 mm. The depth of the well reaches 13 m. The diameter of the nozzles can be equal to the limit from 100 to 600 mm. The wall thickness of the well is equal to a figure from 25 to 110 mm. The intermediate values are 40, 62 and 80 mm. The height of the neck is 500 mm. The inner diameter is equivalent to 600 mm.
According to consumers, such wells have their own characteristics, among them:
- impressive enough size to work inside;
- obligatory availability of stairs;
- the presence of space between the axis of the inlet pipe and the bottom of the chamber.
The latter is necessary for the installation of valves and its maintenance.
Reviews of eccentric and adapter wells
The eccentric wells have a hatch that is closer to the edge of the chamber. Typically, such products have a more impressive size. The location of the hatch provides access to the stairs. Eccentric wells, according to consumers, make it possible to collect and store process water, install pumping equipment, as well as inspect and maintain networks with pipes of impressive diameter.
Differential wells are also called quench chambers and are used in gravity systems. As buyers emphasize, they reduce the flow rate and redirect it to other collectors. This type of well combines the functions of sedimentary chambers, because the inlet and outlet of the pipes is located above the bottom, and all suspensions are in the chamber.
Diversion wells, according to experts, are installed if necessary to reduce the laying depth for the incoming pipeline. Such products are mounted at the risk of a sharp decrease or increase in flow rate.
The cost of wells and hatches
When installing a drainage system, you may need a 1000-liter plastic sewer well. You can make it from plastic rings, the volume of each of which will be 150 liters. Such items will need about 7 pieces, the cost of each of them is 4290 rubles. This will allow you to get a distribution manhole. The base of the manhole will cost the same price. The manhole itself can be bought for 6149 rubles.
Plastic rings for a sewage well will cost 1120 rubles. Their height and diameter are 200 and 750 mm, respectively. The bottom of the well can be purchased for the same price. Its height and diameter will be 36 and 750 mm, respectively. A plastic hatch for a sewer well with a height and diameter of 150 and 800 mm, respectively, will cost 3050 rubles. A well cone costs 1,280 rubles.
In addition, you can purchase crowns for inserting the coupling into the drainage well. If the diameter of the product is 110 mm, then it will cost 500 rubles. A cuff for a tie-in into the well can be purchased for 900 rubles. Its diameter will be 200 mm. The base of the drainage well, which is also called kineta, costs 4000 rubles. The diameter of this product can be equal to a figure from 315 to 110 mm. This design has a linear diameter. If you need a product with three inputs and one output, then you will have to pay the same amount, because its parameters remain the same.
Installation of a well of storm sewer
Plastic wells for storm sewers are installed in the pit, to which trenches for laying pipelines are brought. The bottom of the pit is covered with a gravel cushion and covered with geotextiles. If the site has a high level of groundwater, it is recommended to fill in a concrete slab or screed, providing a hook for attaching the tank.
Bottom installation and backfilling
The installation of a plastic sewer well in the next step involves the installation of a bottom. Then you can connect the piping. It is important to ensure the tightness of the joints. For this, landing cuffs and gaskets are used. The remaining space between the plastic well and the walls of the pit is filled up; to do this, screening or slag must be used, followed by tamping. The dug trench after installation of pipes is filled up with the removed soil.
In order to protect the structure from debris and give it an aesthetic finished look, you should use the plastic cover, which is usually supplied. It can be mounted on threads or o-rings for secure mounting on the neck.
Finally
The sizes and prices of plastic wells for sewage have been mentioned above. The cost of products will allow you to evaluate the market for relevant products. However, for the proper functioning of the system, it is important to comply with all the requirements of the technology. It provides for the correct location of wells at bends and junctions, when it comes to revision parts of the system.
But the nodal wells are located in those places where several branches of the pipeline intersect. Storm plastic wells are used to drain storm water. Differential products should be mounted in those places where the inlet and outlet pipes are at different levels.