How to make a sewer in a private house with your own hands

How to make a sewer in a private house with your own hands How to carry out sewerage in a private house with your own hands

It is difficult to name a suburban a house is comfortable if it is not equipped with a well-thought-out and well-functioning water drainage system. It is an analogous part of civilized existence as ventilation, electricity and heating.

Efficiency and environmental friendliness requirements are imposed on this important component of communication at home, and the water drainage system in a private house should be conventional in arrangement and convenient to use.

One of the main issues of improvement is to make a sewage system in a private house, it is not difficult with your own hands. You will learn how to correctly draw up its project and what to focus on during installation, help you figure out the rules that have already been tested in practice.

Types of sewerage systems in a country house

All private buildings that are located in the private sector can be conditionally divided into two categories:

  • Houses where it is possible to connect to the city network. In a large number of cases, this is the best option, with a long service life and no maintenance problems, unplanned costs and water quality control.
  • Cottages where connection to the city network is not possible. The fact that a centralized network cannot be accessed is not a reason to give up convenience. In such situations, the sewer device in the cottage is transferred to an autonomous type, where water purification and waste disposal will take place in locally installed treatment facilities.

The autonomous sewerage system includes:

  • Internal type of sewerage, which will be responsible for collecting runoff water, as well as their output to the outside. This includes internal wiring (pipeline system), as well as household and plumbing fixtures.
  • Outdoor sewage type. Its components can be called external piping, as well as a device for water purification (an autonomous sewage system or a septic tank).

The most suitable (in terms of performance) type of individual cleaning equipment is chosen, certain factors are taken into account:

  • Climatic regional conditions.

  • The level of water occurrence under the ground.
  • Site size, soil structure and type.
  • Intensity of water application.
  • Seasonality of living in the house.

The first stage of the sewerage installation can be called the development of a preliminary design scheme.


How to make a sewerage scheme in a house

A sewerage scheme in a country the house is tied to the layout of the cottage. It should have the main elements of the system - a riser (if there is more than one floor in the building), pipe markings (corners, turns and internal wiring), points of fluid drainage.When creating a project, it is necessary to remember that a highly complicated schematic image will in the future become a prerequisite for problems during repair and operation. The internal type of wiring is usually laid when building a house. Its installation is completed when the roof of the structure and floors are installed, but finishing work on the premises has not yet been carried out.

The external type of sewage system is installed only after the internal system is fully equipped. Below we have given a sewer diagram for a two-story private house.

Here is a step-by-step plan for drawing up a diagram:

  1. All drawings need to be built on a scale, the location of the riser installation, pipe lines, the number of drain points (connections of household devices and plumbing).
  2. Determine the size of the riser, and also calculate the total length of the pipeline (taking into account the release), the place where the main riser leaves the house.
  3. In places where blockages may appear, it is necessary to provide for revision and cleaning.

  4. A separate drawing is built for each floor.
  5. It is necessary to calculate the size and place of installation of the fan pipe (in huge sewer systems it prevents the appearance of a vacuum in the sewer pipe).
  6. The scheme of outdoor communications is built on the same principle.

Let's talk about the internal sewage system.

Selection of pipes for internal wiring

The following categories of pipes for sewerage in a private house with their own hands can be allowed by building codes:

In practice, the installation of the sewerage system in a country house in a large number of cases is carried out using products made of polymer materials (plastic). The choice will be due to the absence of corrosion (plastic is resistant to aggressive effluent media), as well as easy installation of the structure.

How to make the wiring

The most labor-intensive part of the work can be considered the wiring of the sewerage system for a country house, and it can be correctly carried out according to the rules of installation and design.

Inside the building

Elements of the sewerage system for your house are mounted parallel to the construction of the building. Openings for internal wiring are laid when building walls, floors and partitions. The technology for installing the sewage system provides for certain types of pipes:

  • Riser for sewage, the diameter of which is 10 cm.
  • Main (between the outlet and the riser), and the diameter is 7 cm.

  • Drainage system (connected to the bathroom, washbasin, washing machine) 5 cm.

The water discharge system inside the house is gravity (without pressure). To avoid blockages, pipes are mounted with a slope, the size of which is controlled by the level and will depend on the diameter. A sewer-type pipe with a diameter of 4-5 cm will be given a slope of 3 cm for each running meter, and if the pipe has a diameter of 10 cm, then a slope of 2 cm per running meter. Horizontal wiring is done using oblique tees and adapters (crosses) for connection.

The turns are done using two bends with gentle 45-degree bends, and this arrangement will reduce the risk of clogging. After the turns, you need to install the revision. Right angles are only allowed in a vertical structure.

Fan pipe

When a huge amount of drains gets into the sewer system, the latter can fully fill the entire diameter of the pipe. Moreover, when the drains go down, an area with a low atmospheric pressure (rarefaction) will be created behind them, into which water from the siphon and air from the premises will be sucked in with characteristic sounds.

When the pressure returns to normal, then without a water plug through the siphon, the aroma of the sewer enters the room back into the room. To prevent the appearance of a vacuum, a fan pipe with an air valve is installed - they will be responsible for maintaining the pressure in each part of the sewage system. The fan tube has the following features:

  • It is designed and brought out to 0. 5-0. 7 meters above the roof.

  • It must not be combined with ventilation or chimney.
  • It is not placed near a balcony or window.

And consider one more part of the pipes.

Part outside

To install the correct sewage system in a private house with your own hands, you also need to determine the installation site of the septic tank. The outlet (a connecting link between the internal and external sewerage systems on the edge of the room) is laid at the base of the house lower than the freezing point of the ground and isolated.

If it was not provided when laying the foundation, it is required to drill holes for the thermowell, at 0.2-0. 25 meters wider than the pipe diameter. Its edge should protrude from all sides of the foundation by 0. 15 meters.

The space between the outlet pipe and the sleeve is filled with foam.

Useful tips

So, the recommendations are as follows:

  1. How to make a sewer in a private house with your own hands Wet rooms (bathroom or kitchen) should be placed next to each other and at the same time as close as possible to the central riser. This helps to reduce the length of the sewer to the riser, which will greatly simplify installation and future maintenance.
  2. A large project (bath, pool and sauna), additional plumbing means a huge stock volume. You will need to carefully design a water supply and drainage scheme, additional septic tanks and risers, as well as pump connections.

  3. Pipes for the sewerage system in a country house can be placed under the floor, in the walls, or even laid on top. Near the sink, in the toilet and in the shower, a water seal is arranged, due to which foreign aromas cannot enter the premises.
  4. It is not allowed to arbitrarily change the slope. Its increase leads to a deterioration in the self-cleaning of the system and the formation of strong noise. When the slope decreases, the electric current of the water is covered, and this is fraught with blockage.

  5. Difficult landforms of the site create additional problems for laying the pipeline with a slope. In this case, an axonometric diagram is built, which makes it possible to determine the position of the sewer elements in space. If difficult places cannot be bypassed, then the installation of the pump will be the way out.

These tips will help you in your work.


A well-organized and designed sewerage system helps to create the required minimum of comfort for residents in the house.

The achievement of such a worthy goal will be facilitated by the involvement of specialized specialists. It doesn't matter if it is a brick or a wooden house - the principles of the system are always the same.

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