How to connect fun pipes

17-04-2018

Pipes

Each device that is designed to drain waste, equipped with a siphon. If the house has several floors, then the riser is additionally equipped with a funnel pipe. Its main purpose is to divert unpleasant odors outside the structure. The fan pipe also plays another role: after draining the drains from the siphons, water can escape due to rarefied air, if it does not exist, unpleasant smells will flow into the house. In order for this system to work without failures and properly, it is important to know how to connect the funnel pipes correctly. That is what will be discussed in this article.

Installation requirements

There are several immutable rules for the installation of a fun pipe:

First, the diameter of the fan pipe must be greater than or equal to the diameter of the riser.
Secondly, the installation of the riser begins with a warm zone, and ends in a cold one.
Thirdly, the outlet of the riser pipe should be located in such a place that unpleasant odors are easily removed from the living area.

From this it follows that the fan pipe is a continuation of the sewer riser. The principle of operation of this system is as follows: the warm air rising along the riser forms a slight vacuum. As a result, the unpleasant smell will not penetrate into the bathroom, it will be brought out.

System connection rules

Connection of sewage pipes in the house can be performed with two, three or more risers. For each riser, you can install an additional hood. In another embodiment, it is possible to connect the funic pipes into one system. Make all these connections can be in the attic. As a result, only one common fan pipe will be placed on the roof. If the riser is made of plastic pipes, then a 45 ° elbow is used for the connection; if it is made of cast iron, then installation of a straight tee is allowed. At the exit of another riser, a straight knee or tee (straight) is also mounted. Through tees you can connect several fun pipes.

As a rule, the connection of the funnel pipes is carried out under the ceiling of the last floor of the house. Why is that? When it is cold outside, the warm air, which is saturated with vapor, rises up the pipe. At this time in the fan pipe it cools down and enters the unheated room in the attic / roof. As a result, the air condenses and the condensate freezes on the inside, turning into ice. Gradually, the cross section of the pipe is reduced, which will lead to a violation of the hydraulic lock.

Often, when connecting the funnel pipes another problem arises. In a two-story building there are several risers, the exhaust of which cannot be combined with each other on the upper floor. To get out of this situation, you can connect the pipes on the lower floor. At the same time, this should be done using a tee with an exit to 45 °. This will allow the vent openings not to completely overlap during drainage.

Tip! If there are straight or horizontal sections when laying the fun pipes, then it is important to observe the complete sealing of each joint, especially if the pipe goes under a slight slope.

Such pipes in the attic are fixed with special pendants, clamps or brackets. The choice of fastening method will depend on the pipeline material used.

Following all the recommendations, you can protect your home from unpleasant odors that can come from the sewer system.