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When a waste system is in operation, noises originate inside the pipework which vibrates due to the fall of the liquid being discharged.
Most of the noise propagates inside the pipe, however, the vibrations generated are transmitted from the walls of the pipe to the surrounding area, to the pipe anchoring system and consequently to the building structure.
To control the levels of noise created by waste systems not only requires the correct design of the system and clearly the correct installation but also the tidentification of a waste system that will guarantee a high soundproofing performance.
Silere® is a top sound insulating product that was designed with the aim of providing high performing sound insulated waste systems, in fact, with a waste flow of 2 l/s (represents the typical discharge rate of a WC) noise levels of 6 dB(A) were measured.
The reference standards used to evaluate the performance of waste systems in the laboratory and which specify the measurement methods are DIN 4109 (together with DIN 52219) and EN 14366.
Both standards require the use of a test building composed of four floors with a concrete wall onto which the waste stack is anchored.
The measuring floors are divided into two rooms: the front room is where the waste stack is installed, the rear room is free of installations and receives the sound vibrations that are transferred from the partition wall. The values measured can be expressed using different indicators according to requirements and the reference standards.
LSC,A is the indicator required by EN 14366 and indicates the structure-borne noise level, whereas LIN is an indicator that also encompasses the air-borne noise required by DIN 4109.
It’s not important which indicator is the most effective, however, when comparing different waste systems it is of vital importance for a fair comparison that the same indicator is used.
The real noise levels produced by a waste system can only be measured when it is in operation, in that it depends on numerous factors such as the installation and the building type; laboratory indicators should be used only as a means of comparison.
Valsir provides complete support both during the planning phase and on site, thanks to a first-class technical office made up of a team of highly experienced engineers, capable of dealing with the most complex system requirements.
Valsir S.p.A.
Località Merlaro, 2
25078 Vestone (BS - Italy)
Tel. +39 0365 877 397
Fax +39 0365 81 268
valsir@valsir.it
