To drain wastewater, fan pipes for sewage systems, which are simultaneously capable of solving the problem of lowering a large volume of liquid, are also being used and gas is being diverted from water pipes. Apply such a sewer connection according to engineering wiring. The presence of a fan pipe allows you to prevent a vacuum in the system and not create water locks.
The sewer sewer pipe should not be covered with anything
Content
The need for fan pipes
A fan pipe is a simple pipe connection between a sewer pipe and the atmosphere. Such pipes can be excluded from the sewer scheme in one-story buildings, in which a large accumulation of wastewater is not so often formed. In low-rise and multi-apartment buildings, fan pipes are used for sewage with a clear need. Hydraulic locks can disrupt large amounts of liquid in installed plumbing units, and a painful smell often comes from empty siphons. Constantly controlling the amount of fluid used in siphons is the main role of a fan pipe. It is recommended to include a fan pipe in the system in some cases when:
- the house has more than one working bathroom, which can often be used simultaneously;
- using local sewerage using a septic tank, which is located at a short distance from the house;
- if the house uses a pool or other devices that form a large number of drains;
- The riser is constructed using a pipe with a diameter of 11 cm.
Before installing such a pipe in a room, you need to familiarize yourself with the recommendations covered in SNiP. As a rule, in private houses sewer fan pipes made of plastic with a cross section of 110 mm are used.
Helpful advice! It is forbidden to bring the fan pipe to the attic, and not to the roof - it is better to organize its output in parallel with the outlet of the chimney, but not in the chimney itself.
Scheme of the device of the fan pipe for sewage
It is easier to install a fan pipe for plastic sewage that has a long service life (manufactured according to GOST 22689.2-89), but they may also prefer cast iron - they are made according to GOST 6942-98. It is necessary to independently conclude which pipe to use in shape and length. Depending on the type of installation, there are angular, straight and vertical types. Direct fan risers are mounted perpendicular to the toilet unit. Corner rationally implement with non-standard floor plans. Vertical recommend installing in buildings where several bathrooms.
Fan pipe installation recommendations
Owners of two-, three-story private houses should know What is a fan sewer vent pipe. In a residential building, it works both as an element of noise insulation, and as a eliminator of unpleasant odors from the sewer, and as a controller against overflow of drains. To properly mount such a pipe, you must adhere to the following rules:
- diameter of fan pipe = diameter of riser;
- You can combine the laying of the fan pipe with ventilation ducts;
- the pipe is removed in a cold unheated room, therefore, it must pass through the attic, and its starting point is located in a heated place to create a contrasting transition of temperatures and pressures;
- one such pipe is enough for the whole house, and tees or special crosses are used for branching - this will help to avoid the development of individual schemes for each living area;
- under the overhang of the roof to remove the fan pipe is also not recommended, so that it is not damaged during avalanches and under the influence of ice.
Helpful advice! If siphons of insufficient volume are used, the presence of an irritating smell from the sewage system does not disappear - fan pipes will also help to solve this problem.
This type of ventilation should be taken out onto the roof carefully in accordance with the current operating rules:
- the height of the outlet of the fan pipe can reach up to 3 m, but it is more rational to raise it 50 cm from the ridge;
- horizontally, it is worth observing the distance from balconies and windows to the exit of the pipe into the atmosphere - not more than 4 m.
Installation of the fan pipe by level
Installation process
Before addressing the issue of how to make a fan pipe for private sewage, it is necessary to assess objectively the state of sewage. It is more rational to dismantle cast iron pipes for drains and replace them with new plastic ones. For the installation process you will need a construction knife, wrenches, screwdriver, pliers, thread, sealant. Before mounting, measure the diameter of the fan pipe with the diameter of the riser. The removal of such a pipe can be done independently or combined with ventilation passages.
During installation, the liquid in the riser is blocked. A convenient place for the introduction of the fan pipe is determined and its location: horizontal or vertical, depending on the convenience. More difficult to place is horizontal, which has an aesthetic appearance.
Installation begins from the bottom of the floor or foundation and is carried out sequentially by points:
- plastic pipes are interconnected by o-rings, which are lubricated with silicone for easy connection;
- for fixing the pipe to the wall, special iron clamps are provided, fixed with dowels;
- adapters are installed to connect the bath and other plumbing;
- the fan riser is displayed on the roof and is rounded off, or a cap is put on so that rainwater does not clog the pipe and does not enter the sewer (you can use a protective insect net);
- plumbing is connected to the adapters and a non-return fan valve is mounted.
Sewer check valve operation diagram
The need to install a check valve
It is important not only to make the correct installation of the pipe through the drain channels, but also not to forget to mount the check valve. It can be installed immediately after the full installation of the toilet unit. The valve works according to a simple principle - after draining the liquid from the tank, it opens and passes water into the sewer, so if you do not use the toilet, stagnant liquid with an unpleasant odor does not spread throughout the room. The valve is completely tight and cannot be opened in the room in the usual way.
It is not difficult to make the installation of a check valve, but you need to choose it in accordance with the working diameter of the pipe. This valve will prevent the penetration of effluents from the external piping into the room, which can happen with clogged passages. There should be a tight connection between the valve and the line, which can be achieved using an adapter or directly inserted into the pipe.
Helpful advice! There is no need to improve ventilation with the help of additional exhaust devices on the fan pipe itself - deflectors and other things will only accumulate condensate and freeze in winter, preventing the natural movement of air.
Plastic pipes and fittings for sewage
The importance of using sewer pipes for sewage
Ventilation and fan pipes are similar in principle to operation. Ventilation pads require their own laying rules and they are designed to freshen the air throughout the room, and fan ones are used only in bathrooms. Sewerage without a fan vent is functioning normally in a one-story house, where one working bathroom is involved - this is due to the small number of one-time drains.
The device of the fan pipe is associated with the physical and chemical characteristics of organic waste - they have an unpleasant odor and are lighter than air, so they quickly disappear through the ventilation ducts. This section of sewage is located above all plumbing fixtures and allows you to give the room a "breath of fresh air." Similarly, hydraulic locks work, which in normal condition are constantly filled with water. If in the sewage system with a large number of drains there will be no compensating nodes, such as fan pipes, a water valve can break down due to the liquid occupying the entire diameter of the riser when draining.
Important! The fan pipe must be mounted correctly and in accordance with a suitable diameter, and also a check valve must be installed in the required place to close the overflow of feces.
It is better to bring the pipe on the roof to the side where the wind is preferable. Over the entire area of the riser, it can be insulated and mounted not on the external wall.
