Fan pipe: installation features

Content

• 1 The need to use a fun pipe
• 2 Installation and repair of funnels
• 3 Check valve for internal and external sewage
  • 3.1 Installation Instructions
  • 3.2 Repair of funnel pipes   

This article will discuss the fan pipe - what are fan pipes, how they are used, and how the pipe is installed.

The waste pipe is a pipe that connects the sewer riser with the atmosphere, preventing the creation of a vacuum above the falling

the sewage tower, as a result of which the water disappears from the above-located siphons of sinks and toilet bowls with a characteristic sniffing sound, and through an empty siphon unpleasant smells come from the tower.

Sample toilet pipe pipe

In the case of the construction of buildings with less than two floors, the existing construction standards allow that obsolete cast-iron or actual plastic waste pipes are not used today when installing sewage systems due to the small volume of wastewater.

Let's give an example:

• A funnel pipe for a toilet bowl is required if at a certain moment a one-time drain is able to completely block the cross-section of the sewer pipe;

Useful: in the case of private houses, the maximum value of a one-time flow is reached at the moments of flushing the toilet and bath.

• A toilet pipe of 110 millimeter diameter is always used for toilet bowls, since the diameter of the opening for the flushing tank is usually 70 mm and never exceeds 110 mm, that is, the water flow from one toilet bowl is unable to block the riser with a diameter of 110 mm;
• The sewage running from the bath usually has a diameter of 50 mm, going into a riser whose diameter is 110 mm, since, like a toilet bowl, the flow area of ​​the siphon used in the bath is always less than 50 mm;
• One-time drains of other devices are very small and unable to significantly affect the situation.

Important: if there are several toilets in the house and their simultaneous use, the picture may significantly change and the size of the wastewater may be completely different.

The need to use a fun pipe

Example of a fan pipe

Pipe for toilet bowl is an indispensable element of ventilation in the following cases:

• the house has more than two residential levels, each of which is equipped with sewage and water supply;
• the presence of sewers in the house with a diameter of 50 mm;
• the presence of a pool in the house or other equipment that releases large single sewage into the general sewage system;
• Autonomous sewer system is located next to the house.

Cast Iron Pipe

Knowing what a fun pipe is and performing its installation, it is important to follow two basic rules:

1. Regardless of the material from which the pipe is made - its diameter must be greater than or equal to the diameter of the riser (no tapering is allowed) on which the pipe is installed;
2. The toilet pipe pipe should end at the place where the unpleasant smell can easily escape to the atmosphere, most often 30-50 cm from the ridge of the roof.

Installation and repair of funnel pipes

Plastic pipes

Sewage pipes are usually made of sewage pipes of the appropriate diameter. They constitute a continuation of the sewer riser and end with an input into a channel designed specifically for ventilation of the sewage system.

It is important: in some cases, for example - an insufficient number of ventilation channels), fan pipes are led out horizontally through the wall.

Connecting the fan pipe also allows you to solve such a problem as the appearance of an unpleasant odor in the bathroom during normal operation of the sewage system and high-quality ventilation.

This is due to the small size of the siphons of modern sanpiborov and ladders, in connection with which they form too little water trap - a supply of water. If the sanitary device or the shower drain is not used for several days, this leads to drying of the water seal and unobstructed penetration of sewage air into the bathroom.

At the same time, a pipe made of pig iron or plastic not only draws air, but also ventilates the sewer pipeline. When ascending to the atmosphere through the warm air riser, a small vacuum is created, due to which air does not penetrate into the bathroom, and air partially escapes from the bathroom through the dried siphon. That is why the installation of a funnel in a country house makes the smell when drying the siphon much less saturated.

According to building codes, the fan pipe should be held in a warm room or the pipe should be insulated, because if the fan pipe freezes, then evaporation starts to dissipate insufficiently efficiently and in the first year of operation the upper part of the fan pipe is covered with greenish sticky coating.

Check valve for sewage internal and external

Non return valve for fun pipes

In case of sewage clogging, while the owner is thinking how to clear the clog, the accumulated feces can return to the house.

In order to avoid such a situation, a check valve must be installed on the funnel pipe:

• A cylindrical check valve with a lid is inserted into the drain pipe immediately after the toilet bowl is installed;
• When water is drained, the lid opens and then closes with a stainless steel spring. Thanks to this design, the lid cannot be opened from the outside trying to get back fecal matter;
• The tightness of the connection of the valve with the pipes is achieved by using rubber rings;

The service life of the check valve reaches several decades. Installation instructions

Installation of the fun pipe

Having figured out what the pipe of a fan is for, you should take a closer look at the main stages of its installation:

1. First of all, when replacing pipes in an apartment or a private house, the old sewer system is dismantled. Today, cast iron products are already outdated, so they should be replaced with fun plastic pipes, while taking care. Dismantling is performed by disconnecting the riser and sequentially disconnecting the structural elements.

    

    

   Dismantling the old pipe

Important: before replacing, you should consult with experts to clarify whether the replacement of a part of the cast iron pipe to plastic will entail unpleasant consequences in the form of a decrease in the strength of the entire sewer system.

1. New fan pipe begin to install from the lower point of rigidity, located in the main riser. In the case of a country house, installation begins with the place where its foundation begins. In the supporting structures, they drill holes and install a fan pipe, fixing it with clamps. After the plumbing is installed, a drain is brought to the toilet.

    

    

   

   Mounting scheme

2. In some cases, flexible sewer sewer creates difficulties when connecting with other pipes. In this case, the O-rings are pre-lubricated with liquid soap or silicone, facilitating their entry.

Important: silicone is better than soap; it seals the joint, but it requires more force when dismantling.

1. When installing the fan pipe, only metal clamps should be used to ensure the reliability and durability of the structure, as well as allowing you to select deviations from marking lines that may arise during the pipe assembly process. The stud on the standard metal yoke has a comfortable screw structure that allows you to precisely adjust the elements to be joined.

    

   Metal hose clamps

2. Noise insulation fan pipe is performed using foam or mineral plate.

Important: more easy to use assembly foam will not allow in the case of dismantling to assemble the structure back, which is not critical for an uncomplicated sewage system in a country house.

Repair of fun pipes

Replacement of sewer pipes

When repairing a funnel pipe, the following nuances should be considered:

• The diameter of the pipe must be greater than or equal to the diameter of the riser on which installation is performed;
• The end of the pipe is positioned so as to ensure that the odor is removed by the wind;
• The pipe is laid in warm rooms, and finished in the cold zone (except the attic), since the temperature difference creates the necessary pressure drops in different parts of the pipe, and bringing the pipe to the attic will cause an unpleasant odor to accumulate there, which will then penetrate into the living quarters;
• The design of the house is directly connected to the funnel pipes, especially if there are several risers and, accordingly, several funnel pipes, which is especially noticeable on the roof and on the attic floor.

Vacuum valves

The fan pipe is repaired by direct connection to a single sewer riser, while on the remaining risers vacuum valves are installed, which are rubber seals equipped with springs. A working sewage system creates a vacuum in such a valve, as a result of which it opens by sucking air from a room into itself. After equalizing the pressure in the riser, the spring locks the valve, preventing unpleasant odor from escaping.

After reading this article, you should understand what a funnel pipe is like that prevents unpleasant odors from entering the bathroom, and from there to other rooms. Moreover, it is important not only to install a funnel pipe, but it is advisable to replace the existing cast iron pipe with a plastic one that has greater smoothness from the inside, which does not allow deposits to stick to the inside of the pipe cavity, clogging it up. In addition, the use of plastic pipes significantly simplifies the process of repair in the bathroom when replacing pipes in the bathroom and toilet.