Ventilation of sewage in private homes

Multi-storey urban houses are designed by high-class engineers, and therefore the ventilation of the sewage system is made in compliance with all standards. In individual construction, each director and sewage ventilation in a private house can be installed with errors, which leads to the appearance of a persistent unpleasant odor in the rooms and even the flow of poisonous gases into the house that could be harmful to health. In order to avoid such incidents, you need to follow simple rules.

Why equip ventilation

Whatever the design of the system, in any case, ventilation devices are necessary. Any sanitary unit associated with the sewer system, currently has a water trap siphon. If you include a couple of taps in the house, then nothing terrible will happen. But in the case when a large amount of liquid is simultaneously drained, problems are possible.

Here the elementary laws of physics come into play. Suppose you flush the bath and at the same time use the toilet. In this case, there is a high probability that the entire volume of the pipe will be completely filled, as a result of which a discharged atmosphere is created in the system and a piston pump effect appears. Simply put, due to the pressure drop, water from all the siphons in the house can be sucked into the pipes.

As a result, there is no water seal and air from sewer pipes will begin to flow freely into the room. In homes using autonomous septic tanks, often this effect occurs during the pumping out of the septic tank itself, since when filling the tank, part of the pipework is also filled with liquid.

Important: an unpleasant smell is not the only problem in this case. As a result of the fermentation of waste products, hydrogen sulphide, methane and other toxic gases can be emitted in large quantities, which already poses a serious danger to life.

Highlights of the arrangement

Ventilation from sewage pipes with their own hands settles down quite simply, the instruction is available to almost any good owner who knows how to use the tool at the household level. Pleases in this case also the fact that the price of most nodes and connections is quite acceptable.

Ventilation requirements

Fan systems are traditionally considered to be the most reliable, but even if they do not comply with the norms, SNiP do not guarantee one hundred percent protection.

Do not worry, these requirements are quite simple.

• The fan pipe itself is displayed on the roof, where it is desirable that it rise above the ridge. If the roof is flat, then it is enough to raise the upper cut to a height of about half a meter. But for a gable, gabled roof, experts recommend removing the cut to a height of 1 m. This is caused by strong turbulent flows in windy weather.
• In order for the smells from the system to be drafted not brought back into the house through the vents, the distance from the pipe to the nearest window must be at least 4m.
• The fan conclusion is made of the same diameter as the system itself, at a nodal point at the exit of the house.

• Ventilation from sewage pipes in a private house should not come out in one package with a common, domestic ventilation system. If there is an artificial inflow, it should be located on the opposite side of the roof.
• As mentioned earlier, combustible gases can form in wastewater structures, therefore, according to fire safety regulations, the outlet should be located on the opposite part of the roof or at least 2m away from the chimney, if any.
• In most of the territory of our country, winters are quite severe, so it is not recommended to install a deflector to cut the pipe. Due to the constant, high humidity in winter, the deflector can freeze and block the flow of air.
• The fan pipe, along its entire length up to the very roof, should be insulated so that condensate does not freeze in winter.

Material selection

The best option for arranging fan ventilation is to use PVC sewer pipes.

In this case, they have significant advantages.

1. PVC products are light enough. In fact, such a layout can be mounted by one person with their own hands, plus the load on the supporting structures of the building will be scanty.
2. The range of such goods and accessories to it is impressive for its diversity. You will not have difficulties in arranging even the most complex structure.
3. Plastic, as is known, is a durable material and that it is not unimportant price for it is quite affordable.

Important: often the question arises whether it is possible to use sewer pipes for ventilation inside the house? So, for domestic air exchangers, they are quite suitable. But for furnace equipment and high-temperature systems, their use is prohibited.

Vacuum valve

Ventilation of the sewage system in a private house with a vent pipe on the roof is often used in cottages with a serious square and several floors. In small houses with simple wiring, many people prefer to use a vacuum valve.

This construction is ridiculously simple. The plate blocks the outlet on the pipe and is held in this position with a small spring. As a result, extraneous odors and fumes remain trapped in the system. But in those moments when the suction effect is created, the plate lifts and injects air inwards, equalizing the pressure.

Tip: theoretically, this device is quite simple to do with your own hands, but we do not advise you to do this, the price of this node is quite affordable, it is not worth the time and effort spent on its manufacture.

A vacuum valve is installed at the end of the riser, usually in the attic. Contrary to the existing rumors, experts do not consider this option a complete replacement of the funnel pipe.

First, the device may jam or it may become clogged. Secondly, if the water in the siphon is dry, the valve will not save from the stench. And then, in an unheated attic in the winter, it can simply freeze.

The video in this article shows the details of the arrangement.

Conclusion

Sewage ventilation in a private house is an absolute must. Do not neglect its installation, especially given the fact that the ventilation from the sewer pipes with their own hands settles quickly, simply and for a normal price.