Once they gave me a new, young worker. It was required to train him at work, as a plumber. In the conversation, it turned out that he was some kind of relative of the office staff. It is difficult for young people nowadays to work, so they even send their children to plumbers.
But it’s not the point, like doing a bypass of basements for leaks, in one of the nine-story buildings the "trainee" was a little dumbfounded when he heard a crash over his head. A sewer riser passed under the ceiling, turning into a couch through a 90-degree bend (there should be two 45 each). At this turn, there was a sharp change in the direction of the water flow from vertical to horizontal and waste of life a person who washed away the water, crashed against this corner making a noise.
Naturally, all processes took place inside the pipeline. But the noise from this action is such that people tend to bend their legs out of habit.
The newly minted plumber told me "Are they throwing bricks into pipes?" Meaning the tenants
. I answered him in the affirmative (putting on a smile), some have a mini brick factory...What am I talking about? The fact is that in new buildings, pipes are almost everywhere plastic. Their sound insulation tends to zero. And you can hear the processes that are taking place in your neighbor higher up the riser. Such as flushing the toilet and bathtub. The murmur of water from the sink. This problem is especially evident on the lower floors.
How to reduce noise from plastic sewers?
There are several ways:
Soundproofing with foamed polyethylene. Not very effective, but better than nothing.
In some apartments I met car noise insulation. There is an effect. But it is quite difficult to get around all the corners of the abutment. At the same time, it is a little expensive in terms of efficiency.
The best way is to mount the box from any material. But it is better to make it out of drywall and tiles. In this case, the effect will already be present. But other than that. Then the inner cavity between the pipe and the tile will be filled with "stone or mineral wool". Then the effect will increase. If you plan to repair, then take it into service.
By the way. The young man mentioned above ran away on the second day. The master put him on cleaning the sewers with another plumber. As a result, at the very first application, smelling the smell of the inner world of people, he said: "I didn't get a job to clean up the blockages behind people". He turned around and went to the personnel department to pick up the documents! The curtain...
Eh youth!