Noise isolation of sewer pipes

It is difficult to imagine a modern home without communications that create coziness and comfort. However, in some cases they may bring some inconvenience. For example, a sewage system made of plastic pipes is considered an excellent and modern solution, but unlike cast iron pipes, plastic produces more noise. This is especially noticeable if you live in a high-rise building on the lower floors. However, this is not a reason to refuse to use such pipes. Noise isolation sewer pipes will help solve this problem. That is what we will discuss with you in this article.

The reasons

If you understand the reason for the noise of sewer pipes, it will be much easier to fix the problem. Discharged sewage flows from the top of the tower are the main cause of noise. However, there are a number of other reasons:

• Sewer pipes are made of a material that strongly conducts sound.
• The sewer riser is loose and loose.
• There is an interaction of air flow and water inside the pipe.
• Quick drains.

Noise can be of three kinds. Each type of noise differs in the nature of the sounds produced:

1. Impact noise This kind of sound occurs due to poorly fixed pipes that hit the adjacent water pipe or wall.
2. Air / atmospheric noise. In this case, the noise is formed when the air flow is in contact with moisture droplets that form inside the riser. In another case, the pipes are noisy when a stream of water falls through a stream of air.
3. Resonant, vibrational or structural. This type of sound is characterized by the oscillation of the entire sewer system. The reason may be a poorly mounted system or obsolete pipes that need to be replaced. Moreover, fast streams of water can create a natural vibration in the revision, piers, well and pipes.

Именно по этим причинам и образовывается шум, который порой может даже раздражать. В некоторых случаях достаточно просто закрепить трубу, если она ударяется о соседнюю. Для этого необходимо использовать надежные крепления типа хомутов. Если шум воздушный/атмосферный, тогда без шумоизоляции никак не обойтись. Обернув трубу в шумоinsulation material вы раз и навсегда избавитесь от неприятных звуков.

The noise level of sewer pipes depends on the nature of the sounds being made.

What determines the volume

The loudness of the noise depends not only on the rate of discharge of water through the vertical pipe. This factor is influenced by the material from which the pipe is made. For example, some sewer pipes made of polymer material produce much less sound than others. As for the cast-iron pipes, they do not make any noise at all. They have a lot of weight, for this reason you will not hear the roar from them. The greater the wall thickness and mass of the pipe, the less noise will come. Why? This is explained by the fact that in such a case a large force of the shock wave is necessary, and the drains cannot ensure this in any way.

This is not the case with plastic pipes. Their weight is small, and the walls are very thin. Therefore, you can often hear the resonance with the flow of air and falling water. It is for this reason that some decide to use old technology for the riser and install cast-iron pipes.

Some manufacturers make pipes from noise absorbing material. Also produced pipes with thicker walls that protect against strong noise. Such pipes do not need additional wrapping noise insulation material. So, what to do if the pipe is noisy, we will look further.

Methods and materials

There are several options to eliminate the noise of sewer pipes:

• Structural absorption. It is achieved through the installation of silent pipes.
• Full soundproofing solid riser.
• Infrasound redemption.

The most effective means in the fight against structural sounds is the installation of sound-absorbing pipes. In all other embodiments, it is necessary to use sheet or roll materials, for example:

• piece tile or patchwork;
• synthetic roll;
• soundproof tape;
• special mats.

To work with such materials do not need to purchase expensive equipment, it is enough to have a sharp knife and tape. However, the problem arises in cases where the sewer risers are held outside: the sound insulation material will spoil the whole look. In this case, you need to think about making a box that will hide the pipes.

Noise absorbing material may have different types: rolls, shells, cylinder. In addition to sound insulation, modern material also has another function - thermal insulation. For example, this refers to the soundproofing tape. It is sold in roll packs. Piece materials are made of polyethylene foam, having the form of pipes. They need to be pulled onto the pipe, due to which seamless insulation is performed. In addition, foam shells and foam covers are used.

To work will require:

• insulation material
• sharp knife
• Scotch,
• mounting clamps with rubber seal,
• wire.

Depending on the material you purchased, the tool kit may differ, but only slightly.

Plastic pipes

Ideally, you should perform sound insulation of sewage pipes during their installation. But you can perform work on sound insulation and after installation.

Instructions for sound insulation works

If you need to perform noise insulation urgently, you can use clamps with rubber seals.

1. If you purchased soundproof material in the form of pipes, cut them to fit the dimensions you need. It is important that they cover the entire pipe over the entire diameter. If the material is sheet, measure the sheets so that after enveloping they go overlapping.
2. When using sound insulation tape, simply wrap the entire riser around it. If there are gaps, the tape will not fulfill its main purpose.
3. Using sheet material it is necessary to use scotch tape, which will fix the sound insulation.
4. If the soundproofing material is dense enough, you can use soft wire or plastic fasteners, such as ties, for better fixation. They are installed in 250 mm increments.
5. If you plan to build a box of plasterboard, then after wrapping the pipes with sound insulating material, the empty space between them can be filled with foamed polyethylene.

Sound insulation with glass wool and mineral wool is unacceptable, since this material cannot be mounted in residential premises - it has a negative effect on the respiratory organs, and the mounting foam is ineffective!

Roll materials

When using roll material, you should perform the work in the following order:

• To determine the amount of material needed, calculate the area of ​​the entire pipe.
• Cut the material so that it can cover the pipe completely.
• The edges should meet butt along the entire length.
• Secure material with scotch tape or wire.
• Roll up the pipe with adhesive tape in three layers. Tight fit of the tape will reduce the resonance.
• For a better effect, make a drywall box. Fill the empty space with a compactor.

Advantages of sound insulation by polyurethane foam

Unpleasant sounds of gurgling and gurgling of sewer pipes can be eliminated with the help of polyurethane foam noise insulation (shell). The main plot that needs sound insulation is the spider. It is necessary to isolate it with polyurethane foam. Although the price of this material is quite high, the work process will be easy, and the end result will please. Using polyurethane foam, it is possible to soundproof pipes in the most hard-to-reach places, including in places of bends. Polyurethane foam can also be sold in the form of mats or rolls. Using the foam shell, you can not achieve the same good sound insulation.

Infrasound sound insulation

Infrasound is a natural phenomenon that is directly related to low-frequency sound waves. A person cannot perceive this sound level. Such a sound can also emit a sewer riser, especially if the inside of the pipe has growths due to prolonged use. There are two methods of sound insulation for infrasound.

1. Partial replacement of the riser.
2. Artificial noise suppression in pipes along the entire length of the riser.

If you do not have the ability to replace the riser completely, a partial replacement would be ideal.

This work is carried out in the following order:

• The middle of the pipes is sawed off by the grinder, and cast iron crosses are left.
• The resulting plaque is eliminated by special chemicals.
• Plastic pipe is mounted with special transitions.
• It is recommended to immediately wrap the pipe with soundproofing material.

This technology is applicable to plastic pipes. But the difference is that the replacement of the riser is performed completely, including crosses, sockets and knees, starting from overlapping and ending with floors.

It is good if your neighbors are also ready to replace the pipes. In this case, the replacement is performed through the overlap. Although this method is difficult and laborious, as a result, you will achieve the best result in the manufacture of a silent sewer system.

Installation of silent pipes

Silent pipes have a number of differences from ordinary plastic pipes. Their structure consists of a three-layer heavy-duty material. Their design provides a heat and noise insulation layer.

1 layer. Consists of smooth polyurethane. It contains mineral particles that localize noise. Such pipes have high strength, and the polyurethane layer prevents the appearance of corrosion, as well as the negative impact of aggressive environment.

2 layer. Made of polypropylene with reinforced mineral particles. It is this feature allows you to block the gurgling and rumbling pouring water from above.

3 layer. Made of heavy-duty polymeric material, for example: polyvinyl chloride, polypropylene or low-pressure polyethylene.

Silent pipes are laid using the following technology:

• The first step is the design and calculation of the desired material. Measurements are carried out with a tape measure. Pipes are cut to size with a hacksaw.
• Cut off the edges should be carefully cleaned with a file on both sides at an angle of 150 °. This will allow easy installation without gaps or dents on the O-rings.
• When connecting pipes, pay attention to the sealing ring. It should lie flat and in place.
• On pipes, both inside and outside should not be completely fibrous substances or other contaminants.
• The flap of the socket is made with silicone grease, which is applied to the smooth part of the pipe. The pipe is worn all the way.
• It is important to mark contact points.
• Back pipe extends 1 centimeter. This must be done, because under the influence of cold or hot streams the length of the pipe may vary slightly.
• Shaped elements move to the stop.

After completing these actions, the pipe is installed vertically. It should be fastened with clamps to the wall so that it does not hang out. The mount can be floating or rigid. Hard mount must have a rubber O-ring.

If it is necessary to allow a small movement of the pipe in the longitudinal direction, a floating mount is used.

This technology allows you to completely eliminate the unpleasant noises that are heard in the sewer riser. But it is used only as a last resort, when all the methods for the manufacture of independent noise insulation do not bring their fruits or they can not be executed.

Watch the video in which silent tubes are tested:

Possible mistakes and recommendations

If you do the work on sound insulation yourself and for the first time, without knowing some nuances, you can make simple mistakes that will lead to poor results.

1. Wrong choice of sound insulating material. For example, some decide to use only mineral wool. As a heater it is an excellent material, but it is not suitable for sound insulation.
2. Badly tightened tape or other fasteners. Because of this, a small gap is formed between the pipe and the material, which will provoke sound resonance.
3. Use clamps without rubber seals.
4. Pipe installation without gasket.
5. Small layer of sound insulation material.

All this is very simple, but non-observance of at least one item can reduce efforts.

Video

Organization of noise insulation using the material K-Fonik: