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How to make a drain pit with your own hands: technological rules and small tricks

How to make a drain hole with your own hands

With the advent of summer, many people leave the stuffy city and spend time in the country. But not always at the summer cottage there are elementary amenities, including the modern sewage system. With urban housing (apartment), everything is clear: all waste and wastewater “goes” into the centralized sewage system, but for a summer cottage / private house that is not connected to a centralized sewage system, this is a kind of obstacle for a good rest. But this problem is completely solvable and a drain pit with one’s own hands will just bring life in the country to the civilized world.


  • Drain pit – choosing a place
  • The volume of this waste tank
  • Rules for laying pipes
  • The choice of material for the construction of the drain pit
  • The shape of the collection tank
  • Ceramic brick drain pit
  • Concrete ring structure
  • Little tricks of arrangement

A drain pit in a private house is the simplest, reasonably convenient and functional example of an autonomous sewer. This system collects used water into a storage pit. And without this in any way, because a person not only drinks water, but also actively uses it – he is washing, taking a shower, bathing, washing, preparing food. Today, it is difficult to do without water and amenities such as an indispensable washing machine. Therefore, any summer resident or simply the owner of a private home should think about where to put this used liquid.

Drain pit – choosing a place

Before making a drain pit, you need to decide on the choice of its location. The question is rather complicated, because it has a number of aspects. The first aspect: a drainage pit – the distance to the building should be at least five to eight meters, you must adhere to such parameters and do not have a drainage pit near the house. Another issue is the length of sewer pipes; they should not be excessively long. Well, the third side of the issue concerns the cleaning of the drain pit, that is, there must be an access to the sewer machine to it. And you also need to pay attention to the wells and wells: if they are present on the site, then there can be no talk of a drain hole with natural filtration. The minimum distance allowed between these two objects is 30 m.

With regard to determining the level of groundwater, this argument does not play a large role in choosing a place for a drainage pit, since groundwater only affects the type of construction: drainage or pressurized.

The volume of this waste tank

Before you dig a drain hole, you must correctly determine its volume. This parameter depends on the nature of the use of housing: people live there permanently or seasonally, on the number of family members, on the frequency of use of the bathhouse, shower, etc..

Drain pit

Appearance of a typical drain pit

It is believed that 0.5 cubic meters per person. m. of the volume of the drain pit, but these calculations are not always accurate due to the additional benefits of civilization and operating conditions.

This may also apply to clay soil that is not prone to rapid filtration, therefore, if the accumulation pit still does its job for the first year, then the soil will become saturated with fats and will practically cease to absorb waste. Therefore, if possible, it is better to make a drain pit with a reserve, for example, for a family of three people – 6 cubes.

Rules for laying pipes

If the volume has already been determined, then you can start laying pipes. At this stage, a very important point: maintaining a constant slope of 3-5 degrees, this is approximately 4-7 cm per meter of the pipe being laid. And also it is necessary to take into account the fact that the longer the pipe, the greater the slope must be observed.

The choice of material for the construction of the drain pit

The device of the drain pit may be different:

– brick;

– plastic;

– concrete rings

Drain pit

The initial stage of construction – the pit

All these materials are used to equip the drain structure. The walls of the pit can be covered with brick, or you can use capacity as a basis: a barrel without a bottom, a casing from an old washing machine, car tires that are stacked one on top of the other.

The shape of the collection tank

Usually, a drain pit in the country is equipped in the form of a cube. But this is not the best option. It is more rational to use a cylindrical shape, since it is known that a cylinder is a more solid figure. The loads on its walls are evenly distributed, and the probability of destruction of the cylindrical drainage pit is practically reduced to zero indicators. And quite the opposite is the case with a drainage pit of a cubic shape, its walls can not withstand the load and the probability of its destruction is significant.

Ceramic brick drain pit

So, first a hole is digging according to predefined sizes. High-quality soil – black soil, can be distributed on the site, and loam, sand, clay and stones are best removed from the yard.

Brick drain pit

Brick Drain Pit

How to make a drain pit of brick? Ceramic brick is the most optimal option. It has positive characteristics: it serves for a long time and does not collapse from the destructive action of moisture. It must be laid on a light foundation. The thickness of the walls can be half a brick to save money, when laying brick, you need to remember about the gaps between the ends for filtering (5 cm).

Important: the walls of the pit can be laid out not only with brick, but also with natural stone.

After completing the masonry in the lower part of the pit, you can begin the process of drainage filling. For this, the space between the foundation pit soil and the walls of the drain pit is filled with rubble, pebbles or construction debris (concrete, brick).

Important: the drainage bed should be approximately 20 cm.

Masonry is not carried out to the very ground level, but 80 cm lower. At this mark, a reinforced concrete slab for flooring is equipped. It can be factory or homemade. Do-it-yourself concrete slab can be poured on the formwork (20 cm thick).

Also in this concrete structure, it is necessary to take care of the hatch for pumping out drains and arrange a reliable lid to completely exclude the possibility of children falling into the drain hole. If desired, you can make the ventilation of the drain pit.

Important: if the drain pit is at the entrance of the vehicle, the concrete slab should be thicker (at least 25 cm), plus a well-reinforced.

The remaining space is covered with earth. That’s it, the drain pit is ready, you can safely walk and ride along it, and you can also plant a flowerbed for the beauty of the yard, then such a device will not spoil the site design.

Concrete ring structure

People who want to make a drain accumulator on a site often have a question: how to make a drain hole from concrete rings? A drain pit made of reinforced concrete rings is easy to build, you do not need special qualifications for this work, only physically have to work hard.

Concrete ring drain pit

Concrete ring drain pit

Stages of the work:

  • At the site where the drain pit is planned to be installed, the first ring is installed. Under it, soil is selected and the ring drops.
  • The second ring (with the same size) is installed on the first ring. The edges of such rings have protrusions, it is thanks to them that the sewer rings are assembled into a single design.
  • Soil is selected until the second ring also lowers.
  • The drain pit may consist of 2-3 rings or more, depending on the planned size.

Important: the last last ring must necessarily rise above the ground by 20-30 cm.

  • The hole for the outlet pipe is easiest to do with a hammer drill using a core drill. And if this is not, then on the ring you need to draw a circumference of the location of the drain pipe, drill it with a conventional drill, and then knock it out.
  • The drain pit is covered with a durable lid: reinforced concrete, cast iron.

Little tricks of arrangement

It is clear that sooner or later it will be necessary to call a sewage machine for collecting wastewater. But how to make a drain hole, so to speak, “long-playing”? There are several nuances that will help extend the cleaning time of the pit. First of all, you can divide the drain. That is, in addition to the main drainage pit, equip another pit, but only of a smaller size. It will merge water without solid waste (from the washing machine, from the bathroom, shower). Water in a smaller drain pit will quickly go to the ground, since there will be no accumulation of fatty deposits on its walls.

Well, and secondly, you can take advantage of the achievements of modern science. To do this, you need to purchase special products consisting of a biological base. This is a unique liquid with bacteria. Such bacteria recycle waste, the drainage is cleaned, and the seepage of water into the soil improves.

The technology for arranging drain pits (brick and concrete rings) is simple and quite doable on its own, without involving a team of professional workers. And the benefits of such a device are huge: comfort, convenience and reliability.


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