Drain pit with his own hands

The easiest way of arranging the central sewage on the site of similarity is to construct a drain hole for sewage water on its own. Its arrangement can be divided into several stages.

Preparation stage

At this stage it is necessary to make calculations - what size should the drain pit equipped with its own hands be, should be determined the number of people whose accommodation is planned for a country plot. The volume of the drain hole directly depends on the intensity of use of various plumbing fixtures.

In addition to the choice of size, it is necessary to determine exactly where the drain hole will be organized with your own hands. The following rules should be followed:

• Choose a place you need based on the location of groundwater. Such places should be avoided so as not to pollute the water that enters the house from a well or well located on the site. To determine the location of groundwater can be using observations - for example, above groundwater located close to the surface, marshy plants grow well. The water level in the neighboring wells can also show the depth of the aquifer. But accurate information can be obtained mainly through test drilling.
• The distance from the water source to the drain pit should be at least 20–30 m. From the house, a well-equipped pit should be located no closer than 5 m.
• If the site is uneven and has pronounced heights and lowlands, the drain hole should be located in the lowest section for better flow of wastewater into it. In this case, taking into account the precipitation, the pit needs to be done more than it is planned.

Excavation

After selecting the location and volume of the drain hole is required to carry out primary excavation. Digging a pit under the drain hole for a small family is not so difficult.

The construction of the pit depends on whether you plan to concrete the walls of the drain hole or not. Sealed sewers will require regular cleaning of the pit from waste with the help of the waste collection service, as well as the drain pit without concrete bottom.

At the bottom of the prepared pit should be laid drainage - sand and gravel pad. It will be including the water filter, gradually leaving the ground. When concreting a layer of sand and gravel can be made small - up to 10 cm. However, if such a pillow is planned as a natural filter, its thickness should not be less than 20 cm.

Arrangement of drain holes

Concreting of the bottom is carried out using concrete solution and reinforcement. On the prepared sand and gravel cushion, a layer of mortar is laid out in 5-10 cm, into which the reinforcement grate is embedded and another layer of concrete mortar is added. If you plan to use concrete rings for an airtight drain hole, you should deepen the walls while arranging the bottom so that the diameter of the bottom of the drain hole becomes larger than the diameter of the hole for the sewer hole.

After arranging the bottom of the pit, it is necessary to proceed to the formation of walls. To do this, you can use:

• concrete rings
• concrete solution and reinforcement,
• bricks.

В том случае, если планируется в качестве стен положить concrete rings следует обустраивать сливную яму следующим образом:

1. After organizing the concrete bottom (the area of ​​which should be slightly larger than that of the ring), a concrete ring with a diameter slightly larger than the diameter of the pit, is placed directly above the pit.
2. Gradually removing the soil from under the ring, it is lowered to the level of the surface. Then put on top of the second ring and continue to remove the soil to the bottom.
3. At the bottom, the joints of the ring and the concrete bottom must be treated with a concrete solution for sealing.
4. If the bottom is just a sand and gravel pad, then the rings are simply lowered to the desired depth, and the joints between them are sealed with cement mortar.

Concreting the walls in-house will not only require the manufacture of cement mortar from cement of a grade not less than M200, but also the construction of formwork from wooden boards. For greater strength, be sure to add reinforcement - metal rods with a thickness of at least 1 cm.

The drain hole, the walls of which are brick masonry, is not necessarily equipped with a whole brick. Broken bricks, connected with cement mortar, will fit perfectly for the organization of sewage of a private house.

During the construction of the drain hole, it is necessary to provide for the connection of sewer pipes from the house. At the top of the tank, a hole with a diameter slightly larger than the drain pipe must be made. The void between the pipe and the walls of the hole is filled with sealant.

On the prepared drain hole you need to put a sealed cover with a hatch.