Plumbing

New pipe for downstairs toilet, bad smell after a few days.

Anonymous user 03/03/2024 - 3.38 PM

Hi, I have installed a new 110 pipe at gradient 1:80 from the new toilet location to the existing stack. I used a branch to connect to the stack. In order to hide the branch in the ground I removed 270mm of stack clay pipe (in the ground) and used a rubber/plastic adaptor to connect the branch to the clay bend directly. (I noticed the adaptor has slightly smaller inner diameter than the rest of the stack?). I covered everything with sand and small stone and left for 3 days while using the toilet upstairs and bath and everything. Then I poured concrete over the new set up. After 2 days I came back to carry on with other works and noticed bad smell. The new toilet is not installed so I blocked the new pipe to prevent bad smell at day one... I wonder if I did something wrong at the stack and it came to light after few days? Or is it just change in weather causing smell from new pipe as the seal is not proper? Note that I did not pour concrete on the connection ends (new branch), but I want to avoid digging it out just to check. Any ideas on why the smell? Where did I go wrong? Cheer, Kamil