nomorewell
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November 1963, on the day President Kennedy was shot, we were moving into our present house built in 1929. My wife wanted a lavatory on the first floor, so I made one. The 4" copper drain is 11.5 feet from where I ran it into the cast iron stack pipe with a saddle. The old toilet, bought then, worked okay, but later was replaced with a water saver that needed a plunger close by.
About 15 years ago, I drove over to Canada and bought two Kohler 3.5 gallon toilets, one for upstairs and one for the lavatory. The one in the lavatory flushes okay, but often the least bit of toilet paper comes back up. I was told that I have too much pitch in the drain which is about 3.5" per 4' .
I'm about to begin a remodel, and I wonder if replacing the copper drain with pvc, less pitch, would help any. I was told that the water is escaping too quickly. The lavatory sink enters the 4" drain, going directly into the 90 degree elbow below the toilet. I have an air admittance valve in the sink cabinet, and have had no problem with the trap getting sucked out. But, if I were to reduce the pitch, I would have to make a longer vertical drop between the toilet and the 90 degree elbow below it. Seems to me that this would be worse than the pitch I currently have.
Should I replace the drain as I described or just leave things as they are? I did read the posts about toilet paper problems, and mine began just several months ago.The upstairs Kohler hooked up directly to the stack doesn't have the problem though.
About 15 years ago, I drove over to Canada and bought two Kohler 3.5 gallon toilets, one for upstairs and one for the lavatory. The one in the lavatory flushes okay, but often the least bit of toilet paper comes back up. I was told that I have too much pitch in the drain which is about 3.5" per 4' .
I'm about to begin a remodel, and I wonder if replacing the copper drain with pvc, less pitch, would help any. I was told that the water is escaping too quickly. The lavatory sink enters the 4" drain, going directly into the 90 degree elbow below the toilet. I have an air admittance valve in the sink cabinet, and have had no problem with the trap getting sucked out. But, if I were to reduce the pitch, I would have to make a longer vertical drop between the toilet and the 90 degree elbow below it. Seems to me that this would be worse than the pitch I currently have.
Should I replace the drain as I described or just leave things as they are? I did read the posts about toilet paper problems, and mine began just several months ago.The upstairs Kohler hooked up directly to the stack doesn't have the problem though.