ᐅ Check Roof Ventilation – Suspected Incorrect Connection

11ant schrieb:

There was no irony in that at all. It is a matter of fact (and I suspect the original issue) that many plumbers simply don’t have "physics" in their toolkit. Are we actually talking about the same pipe in both threads?

Yes, we are talking about the same pipe. There is only one ventilation line, and the blockages form in the toilet branch itself.

Attached is another image of the piping.

Borrow a fog machine from event production equipment.

Tx-25 schrieb:

Here’s another picture of the pipes.

… which unfortunately exceeds my understanding – I can’t classify this as either a floor plan or a section :-(

Tx-25 schrieb:

Yes, we’re talking about the same pipe. There is only one vent, and the blockages occur within the toilet branch line itself.

I figured we were talking about the same pipe. I don’t believe it’s a thromboid-type blockage, but rather an unfortunate interaction between air and water columns in the piping system, mainly in the soil stack. The earlier thread discusses wastewater apparently getting “stuck” as a water column on top of an air column, and after the air seeps through, it sucks more water from the toilet drain, causing it to dry out. Probably, a spiral along the inside edge of the pipe diameter could help keep the wastewater flowing rather than falling straight down axially (and/or “disturb” the air column downstream by sitting axially before it). Also, a (possibly perforated) hose—also attached near the pipe wall or hanging loosely inside—might create a short circuit between the air before and after the wastewater. The vent stack going upward probably just remains “stagnant” and might need flow stimulation. If you assume a thromboid blockage, you’d likely search fruitlessly, possibly ending up convinced it’s some kind of witchcraft.

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I believe your problem is literally deeper down.
The main drain pipe is located below the concrete ceiling.
There are regulations that must be followed regarding when and which branches off the main pipe need additional ventilation.
This cannot be determined from your sketches.
It could also be a section of reverse slope in the base drain line; if water is standing there constantly, the ventilation cannot work properly within the wastewater pipe, and clogging is also understandable.
Normally, your plumber is responsible for this.

The problem is that both just shrug their shoulders. Our mason installed the piping. The ventilation was connected by the plumber. Since I don’t know who is responsible or where the problem lies, she also doesn’t know whom I can contact. I have already considered buying a small inspection camera myself for €90 and then using it to look inside the pipe.

In the pyrotechnics field, there are smoke pots (available in various sizes and colors) that would be suitable for this purpose. They can be held in the hand and do not get hot... I use them myself at events, etc.