Replacing the pipe itself

In order to prevent unpleasant odors from entering the sewage system into an apartment, ventilation is provided in the system. The main role in preventing the breakdown of the water seal and the discharge of sewage gases is performed by a fan pipe. In the old buildings, the sewer system is made of cast iron pipes and after a long time of use it becomes unusable. Seals at the joints of the joint are destroyed, cracks appear in the iron, and an unpleasant smell enters the room. There is a question about the replacement of pipes. Based on the goal of saving money, replacing the pipes with your own hands will not be any problem. The modern pipe is made of plastic and easy to assemble.

Dismantling and preparatory work

1. Since the fan pipe is a continuation of the riser over the last building overlap, you can not worry about the frivolous neighbors flooding you with sewage.
2. If the whole riser will change, and you do not live on the top floor, then you need to begin work by notifying the residents of the apartments about the repair of the sewage system. Just in case it makes sense to turn off the water supply so that someone accidentally does not start using the sewage system.
3. Now you need to dismantle the cast iron pipe. If you have to change the entire riser, then there is nothing to stand on ceremony with the old pipe - with the help of the grinder, make cuts at the bottom of the riser and with a sledge hammer beat the edges. Because of its fragility, cast iron crumbles easily, and such work is not difficult. If the entire riser does not change, then you need to work so as not to damage the left pipe to which you will connect.
4. If it is necessary to loosen the connection of the cast-iron pipes, then carefully we drill out the cement and heel seals, clean everything and, swinging the edge of the pipe, remove it from the connection.
5. Carefully remove the funnel pipe so that it does not damage the sewer riser pipe.

Installation of a new fun pipe

1. The installation of the fan stand begins from below. We mark and drill holes in the wall for mounting clamps.
2. We perform the connection of plastic and cast-iron pipes using a special insert. For a tight connection of PVC pipes, rubber sealing rings are provided. The ring is inserted into the groove of the bell and lubricated with soap or silicone. Thanks to the lubrication, the pipe will easily enter the connection.
3. We fasten the pipe to the clamps installed on the wall.
4. After installation of all connections, water is drained from the top point into the sewage system and the entire system is checked for leakage. After successful verification, proceed to the isolation of the riser.
5. That in the apartment it was not audible the sounds arising in the sewerage, sound insulation of a fan pipe is carried out.
6. Insulation of the pipe also plays the role of a heat layer of the riser, which contributes to a good load and rapid removal of gases from the system.

This process of our work is completed.

Other situations

The fan pipe is in good condition or generally new, but due to the prevailing circumstances, a defect appeared at some part of the pipe. Do not change in this case, the entire riser, because it entails unnecessary waste, and indeed impractical. Therefore, we need to know how to replace a piece of fun pipe with minimal cost.

If a flat riser in a flat is made of plastic pipe, replacing its piece will not be a lot of work:

1. We measure the length of the damaged section of the pipe and its diameter to acquire a new one.
2. With the help of grinders or hacksaws, we cut a piece of pipe from the riser, and extract it.
3. Measure and cut off a new pipe of the same size.
4. We put on sliding sleeves on both edges of the pipe. They will be useful to us for connecting an inserted piece of pipe with a common riser. Do not forget to insert the sealing rings into the coupling grooves, and be sure to lubricate them with soap or silicone. We will need the coupling to move easily through the pipe.
5. We insert the pipe into the cut out section and, moving the sliding sleeves along the pipe, connect both edges.

When replacing a piece of pipe on a cast-iron riser, the procedure is a little more complicated:

1. Before removing a pipe fragment, it is necessary to perform a backup of the upper section. The cast iron pipe is heavy and, under its weight, can break out of the joint and injure you.
2. The following procedure is the same as with the plastic pipe. Grind out a damaged area with a grinder.
3. We put on special plastic transitions on the edges of the cast-iron pipe.
4. We measure the distance between the two put on transitions.
5. Cut off the desired length of the new pipe and put on the same sliding couplings.
6. We insert it into the cut section and, moving the couplings, we connect both edges of the pipe.
7. We drain the water, check the connections, and on this your work will be done.

We reviewed the process of replacing the fun pipe with your own hands. As you can see, this is nothing complicated. The fan pipe assembled on its own will regularly serve and there will always be clean air in your apartment.

Video

Watch the video about the installation features of the fan stand: