ᐅ Sound insulation for toilet cistern

Who gave you that tip? Was it the plumber?

There are higher-quality versions of drainage and supply pipes that transmit less noise. For wastewater pipes, this often means thicker pipe walls. The noise when refilling is usually more of a water flow sound, which can be annoying. Maybe adjusting the sizing of the supply line could help? There are probably also extra quiet toilet cisterns available (can you test them first? 😀)

Otherwise, adding a lot of weight tends to improve sound insulation, which the wall currently lacks. What about applying or attaching bitumen or rubber mats? We use construction protection mats for this purpose (coarse rubber granules pressed into mats), cut to size to acoustically decouple installations. Built-in elements are placed on rubber and then screwed in, and the same applies to mounting on the wall.

11 Poroton bricks. What more can be said.

EPS is nonsense; it has no mass. You want sound insulation, not thermal insulation ;-)
If anything, use mineral wool or proper soundproofing materials.
Ask the plumber which products can be used to prevent the problem.

Otherwise, at least don’t flush the toilet at night ;-)

superzapp schrieb:

Who gave that tip? Was it the plumber?
Drainage and wastewater systems come in "better" versions that transmit noise less. For wastewater pipes, this often means thicker pipe walls. When refilling, it’s mostly the sound of flowing water that is bothersome. Maybe adjusting the sizing of the supply line could help? There are probably extra-quiet flush tanks available (possible to test the noise? 😀)
Otherwise, adding weight usually improves sound insulation, which the wall currently lacks. Applying or attaching bitumen or rubber mats might work? By the way, we use building protection mats (coarse rubber granulate pressed into mats), cut to size to acoustically decouple installations. Stud wall frames are then placed on the rubber and screwed in, same for wall mounting.

No, not the plumber (at least not the one doing the installation), but someone experienced in plumbing. He told me that noise levels in new installations are not comparable to old ones, and as you mentioned, the refill noise can be the most annoying.

guckuck2 schrieb:

11cm (4.3 inches) Poroton. What else needs to be said.

As I said, that’s not the point here. The conditions are as they are now.

If you really want to achieve something now, the only option is cladding with drywall or a similar material. Possibly even additional insulation...

We have an 11cm (4.3 inch) Poroton wall between the kitchen and guest bathroom. The refill noise bothers me because water flows again after flushing. Since it is next to the kitchen, it’s not too bad. What’s also annoying is the flushing sound, and especially what I’d call the “trickling noise” from the toilet itself. Make sure that the water stream does not hit directly into the water inside the bowl (no joke), as there are different models available. I don’t have a solution yet, but I really recommend you find one, because if you sleep nearby, it can be very disturbing!