SoConfused
Member
Hello - I know this subject has been covered numerous times on this forum and I have read and re-read the threads but am still confused. I am a VERY INexperienced DIYer. I had a cast iron drain pipe rusting through so I replaced all remaining cast iron with PVC. This is probably more than I should have taken on with no experience but I'm a widow with limited resources so I do whatever I can myself. I thought I had replaced everything with the same fittings but now when I flush one toilet water splashes up in the other toilet then siphons out. From the forums I understand that I have used the wrong fitting in the cross. (Double San-Tee) What I don't understand is whether I can use a double fixture fitting or if it has to be a double wye. I have read both answers on the forum.
I'm attaching before and after pics. As you can see I have very little vertical room to work with.
I don't know if it will be clear in the pics but the vent pipe is a 3-inch cast iron pipe that I've connected to the PVC with a fernco. The toilets are both Cadet 3 style, American Standard with 3-inch flush valves.
So should I use a Double Wye with 45s (built in, not street 45s attached) or a Double Fixture fitting??
I appreciate any help you can give me!
I'm attaching before and after pics. As you can see I have very little vertical room to work with.
I don't know if it will be clear in the pics but the vent pipe is a 3-inch cast iron pipe that I've connected to the PVC with a fernco. The toilets are both Cadet 3 style, American Standard with 3-inch flush valves.
So should I use a Double Wye with 45s (built in, not street 45s attached) or a Double Fixture fitting??
I appreciate any help you can give me!