Hello everyone,
After opening a ceiling for another repair, we discovered the following situation: a PVC drain line servicing a pair of bathroom sinks had been damaged during installation by the torch to sweat the copper supply lines. This drain line has a pinhole leak as a result, apparent when both sinks are being used. The attached photo shows the damaged sanitary tee which is connected to one sink drain on the horizontal, another sink drain on the vertical (right side of photo next to ceiling joist), and the downstream shared drain on the remaining horizontal. The vertical drain connection seems to use an eighth bend street elbow as the horizontal drain lines are offset to the left by about one pipe width from the vertical. It is that vertical drain that is giving me headaches since I don't have access to the section above the subfloor unless I decide to chisel it out and using a slip joint coupling on any portion below the subfloor probably extends that drain line below the horizontal. I believe NY plumbing code will allow me to use a quarter bend on that vertical drain to connect to the horizontal but taking a quarter bend elbow straight into a tee/wye sounds like a drainage problem? Needless to say, I'm planning to move the copper supply line to the left away from the drain beforehand. I was also told that NY plumbing code prevents the use of mission fittings on above ground PVC drains which is a shame since mission fittings might come in very handy here, especially since the horizontal lines are installed in a way where they can't be moved much and may not have much play in them. Any ideas and comments much appreciated!
After opening a ceiling for another repair, we discovered the following situation: a PVC drain line servicing a pair of bathroom sinks had been damaged during installation by the torch to sweat the copper supply lines. This drain line has a pinhole leak as a result, apparent when both sinks are being used. The attached photo shows the damaged sanitary tee which is connected to one sink drain on the horizontal, another sink drain on the vertical (right side of photo next to ceiling joist), and the downstream shared drain on the remaining horizontal. The vertical drain connection seems to use an eighth bend street elbow as the horizontal drain lines are offset to the left by about one pipe width from the vertical. It is that vertical drain that is giving me headaches since I don't have access to the section above the subfloor unless I decide to chisel it out and using a slip joint coupling on any portion below the subfloor probably extends that drain line below the horizontal. I believe NY plumbing code will allow me to use a quarter bend on that vertical drain to connect to the horizontal but taking a quarter bend elbow straight into a tee/wye sounds like a drainage problem? Needless to say, I'm planning to move the copper supply line to the left away from the drain beforehand. I was also told that NY plumbing code prevents the use of mission fittings on above ground PVC drains which is a shame since mission fittings might come in very handy here, especially since the horizontal lines are installed in a way where they can't be moved much and may not have much play in them. Any ideas and comments much appreciated!