POLOKAL 3S
MAKE A QUESTION
|
Question: how can You state that Polo-kal 3S is the most noise-proof drainage system on the market?
Answer: the high performance in terms of noise-proofing was tested by the Fraunhofer Institute in Stuttgard (details are specified in the technical catalogue), the important Body certifying most of noise-proof drainage systems.
|
|
|
Question: how could You reach so high noise-proofing levels?
Answer: by working both on the increase of the mass and the pipe layers: a suitable weight reduces the aerial component of the noise while the 3 layers, whose the one in the middle is viscoelastic, absorb the vibrating energy.
|
|
|
Question: is there any law according to which noise-proof drainage systems are required in many-storied buildings?
Answer: yes, the law issued on December, 5 1997 (D.P.C.M. 5/12/1997) provides that noise coming from technical plants, sewage networks included, must be lower than 35 dB (A) in the neighbouring space.
|
|
|
