Device sewage networks in homes and apartments using plastic pipes instead of the traditional cast iron has many advantages. However, the unpleasant consequences of this decision is the appearance of extraneous noise in the sewer risers. This problem can be eliminated by using special materials for sound insulation of in-sewer pipes.
Why noise appears
The main noise is the place of formation drain riser like element through which passes maximum volume. drains moving thereon in contact with each other and with the inner surface of the sewer system parts. This process is accompanied by a rather loud sounds.
The level of such noise can be several times the value of 20 dB which is considered optimal background noise to the human body. Over time, excessive sound load can harm not only psychological but also physical condition of the residents.
There are different types of acoustic effects caused by the use of the drain riser:
- Impact noise: manifested when water falling in a vertical tube and its word stress on the elements of a sewer system. Plastic parts do not absorb and scatter sound waves, so the noise passes freely through the pipe wall of the apartment.
- Structural (vibration) noise: arise at contact parts with the sewer wall surface, beams and other structural elements of the building. It comes from the fact that the strong flows of water pipes vibrate.
- Air noise: occur due to contact with air in the ventilated flow and mixing it with the water flow. Such sounds are not permanent and are low intensity.
Unlike plastic cast virtually noiseless, so noise in the sudden appearance of cast iron pipes can be due to the formation of internal plaque hit in objects or mechanical damage details.
What determines the level of noise
On the volume of background noise is influenced by various factors in the pipeline.
The strength of the noise varies based on the number of storeys of the building and the location of the apartment on the ground floor of high-rise buildings in the overall noise level will be the highest riser.
Also, the volume depends on the material from which the drainage is formed in the toilet. Plastic actively sends dripping water sounds and reflects all the vibrations arising. On the other hand, the cast iron due to its granular structure effectively suppresses vibration of flow and therefore minimizes structural noise.
An important role is played by the thickness of the walls of the pipeline and the specific weight of the material. The higher these numbers, the noiseless drainage works.
On the level of noise affects the location of the communications. The best option is to place a vertical sewer sections in floor decks outside the premises with special acoustic insulation pads.
Materials for insulation of sewage pipes
The process of soundproofing the plumbing communication has two main objectives:
- Minimize acoustic effects from the movement of water;
- Exclude vibration structure during operation.
Accordingly, to eliminate the causes of each used different materials, such as for general profile and specialized purpose.
Materials to eliminate vibration noise
Polyethylene yoke (glasses), the filling of polyurethane. They are used for sound insulation in places of passage of sewer pipes through walls and ceilings of buildings. Alternatively, the manufactured goods may be used polyethylene pipe segment of greater than the riser diameter. The space between the shell and the riser is filled with polyurethane foam insulation and sealed.
vibration-damping clamps. Used to prevent the transmission of resonance vibrations in the walls of bathrooms. Are metal clamps with screw pin for fixing to the wall. On the inner surface of clamp pads mounted from foam rubber.
Materials for acoustic noise reduction
Eliminating unwanted sound effects from sewage pipelines operate using materials based on polyethylene foam, polyurethane foam or foam. By manufacturing form, they can be single-piece, roll, tape, and also in the form of tiles, sheets or mats.
Custom-made products for soundproofing the same shape as sewer pipes and are placed on the part of the riser before the final assembly of the drainage system. For insulation already installed systems use a split foam shell casings and a variety of foam.
Rolling and sheet materials are cut to the correct size band which tightly wrapped around the tube and fixed with adhesive tape or metallized plastic ties. There are complete sets of soundproof material designed for a specific length of the pipeline, such as a set Noiseblock Pipe from "Standartplast".
Self-adhesive Sound Insulation Tape It represents the fine pore sealing material of foamed polyethylene. Is established by a dense and uniform winding on the riser in several layers of turns with partial overlap.
Noiseless sewers
A radical solution of the problem of extraneous sounds in the sewage plant is noiseless multilayer pipes. In their manufacture in a plastic mass is introduced milled mineral filler (microcalcite, chalk, dolomite or limestone) that forms the soundproof structure of the finished product.
The inner layer pipe is made of polypropylene that is resistant to high temperatures and chemical agents. The smooth surface provides a high throughput of waste water and protection from scale formation.
The base layer of polypropylene carbonate particles serves to lock the acoustic effects of the water flow.
The outer layer is made of ultra polymers for protection against impacts and other mechanical damage.
The disadvantages of the silent sewage pipes are high as compared to conventional materials costs and a limited lifespan - about 20 years.
Silent Pipe is easy to identify by their appearance: increased thickness of the walls, the white color of the material, and two longitudinal stripes of red and green along the entire part. Among the well-known manufacturers of plastic pipes is worth noting such as REHAU, Skolan dB (Germany) and WAVIN (Netherlands).
How to make soundproofing sewer pipes with their own hands
The choice of material and the order of execution of works depends on what stage of repair of the decision to soundproofing drainage system.
If the pipes are not yet established, it is reasonable to use uncut materials:
- technological holes in ceiling and walls of the apartment is inserted protective glasses to eliminate the vibration;
- in the pipe locations are established vibration damping clamps suitable diameter;
- on the individual parts are worn cylindrical sewer covers from the selected sound-proofing material.
Thereafter, the drain system is installed in accordance with the plan. Since access to the riser after the completion of the work will be limited, you need to waterproof joints of sewer pipes using a sealant. If necessary, after assembly compound additionally protected sound insulating tape.
When the soundproofing has already established pipeline can be used shell team, rolled and sheet insulation options.
Using the shell
Polystyrene (or polyurethane) parts of semicircular cross section worn around the riser and connected to the sewer by means of special slots. insulation is then fixed construction tape.
The characteristics of this noise insulation material limit its use exclusively straight sections of the pipeline and require free space between the riser and flat walls.
The use of roll and sheet materials
Polyurethane or polyethylene foam is cut into pieces so as to completely wrap the entire overlapped pipe. The joints are glued tape, and then the entire coating is fixed by plastic ties or tape.
Due to its flexibility, the web material allows you to thoroughly isolate remote places, and to make the necessary cuts in areas abutting the residential wiring.
To improve the appearance of the toilet drain pipe can be closed duct of moisture-resistant drywall.
Errors and useful advice
One of the most common mistakes - is the use of unsuitable materials. For noise insulation work is not suitable insulation foam and mineral wool. These materials do not absorb the sound waves and reduce vibration. Besides getting the microscopic particles of mineral wool in the living areas has a negative impact on health.
It should also be familiar with some practical advice:
- It is recommended to choose materials with an outer layer of a solid (e.g., foil), since they are more durable.
- When the soundproofing labelstock must first clean the surface of plastic sewer pipes of dust and debris, and then degrease. This will prolong the life of the insulation.
- When installing the insulation special attention should be paid to the processing of the material joints, or the result of the work will not provide the desired effect.
- Voids inside the plasterboard box can be filled with scraps of expanded polyethylene, to enhance the sound-absorbing structure effect.
- Intensive water stream leads to the formation of condensation on the plastic pipes. Therefore, in accordance with building regulations for domestic sewage is necessary to protect the riser section at a height of 10 centimeters from the floor of the concrete screed. This eliminates the ingress of condensed water to the lower floor.
