ᐅ The siphon or shower drain empties when the toilet is flushed.
Created on: 8 Jan 2021 11:26
S
Stefan2.84
Hello everyone,
We have been living in the house for about 7 weeks now. During the first 3 weeks, the guest bathroom with a shower on the ground floor was our main bathroom, as the actual main bathroom in the attic wasn’t finished yet. For the past 4 weeks, the guest bathroom has mainly been used for toilet visits (too lazy to go upstairs) but rarely for showering. Now the bathroom sometimes smells a bit like sewage. The odor comes from the shower drain. After 2-3 toilet flushes, the drain and probably the shower trap are empty, allowing the smells to come through. Is it normal for shower water to be drained when flushing the toilet? Where should I start looking to find the problem?
Attached are 2 pictures. One shows the plumbing rough-in. Maybe there’s a visible mistake in the pipe layout. The other shows the almost finished shower drain.
Maybe someone has an idea.
Thanks and regards
We have been living in the house for about 7 weeks now. During the first 3 weeks, the guest bathroom with a shower on the ground floor was our main bathroom, as the actual main bathroom in the attic wasn’t finished yet. For the past 4 weeks, the guest bathroom has mainly been used for toilet visits (too lazy to go upstairs) but rarely for showering. Now the bathroom sometimes smells a bit like sewage. The odor comes from the shower drain. After 2-3 toilet flushes, the drain and probably the shower trap are empty, allowing the smells to come through. Is it normal for shower water to be drained when flushing the toilet? Where should I start looking to find the problem?
Attached are 2 pictures. One shows the plumbing rough-in. Maybe there’s a visible mistake in the pipe layout. The other shows the almost finished shower drain.
Maybe someone has an idea.
Thanks and regards
S
Stefan2.848 Jan 2021 13:01lastdrop schrieb:
Has anyone already mentioned a “missing ventilation”? 🙂 So, the ventilation outlet itself is connected to the ventilation stack. That’s not an issue. And I assume the wastewater pipe from the guest bathroom connects to the main sewer pipe. Therefore, there should actually be a connection to the vent system.
Bookstar schrieb:
2. Someone produces such large deposits when using the toilet that the entire pipe system collapses on itself. How big, on average, is a deposit large enough to clog a pipe system? 🙂P
pagoni20208 Jan 2021 13:28Stefan2.84 schrieb:
So there should actually be a connection to the ventilation system.Yes, but the ventilation works as an entire system. For example, if there is negative pressure somewhere (also for instance due to low outdoor air pressure), it can affect the system. You need to have it checked whether the respective air volumes are properly designed. If it were a typical floor drain, I would say you could just pour water in it yourself to prevent it from drying out. You won’t be able to manage that on your own.P
pagoni20208 Jan 2021 13:43lastdrop schrieb:
I assume the flat shower channel trap is already emptied before the toilet wastewater even reaches the main drain. The distance from the channel to the toilet is only about 1.20m (4 feet).Yes, that's what I think too.