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Old 11-10-2009, 10:07 AM   #1
Join Date: Nov 2009
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Re installing toilet

I recently hired a plumber to install shut off valves in a bathroom I am renovating. In the process he took it upon himself to replace the drain lines including the toilet drain. He replaced a 4 inch pipe back to the main drain with a 3 inch pipe which he roughed in to the bathroom. I am now trying to place a new flange on the new pipe and realized that the drain on the bottom of the toilet which is quite old, is 3 5/8 outside diameter and proud to the bottom of the toilet by about 1 1/2 to 2 inches and will not fit. My question is this, it there a coupler/reducer that I can use so I can buy a bigger flange to accomadate the toilet drain and still use the new smaller diameter pipe or do I have to go back to a 4 inch drain pipe?


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Old 11-11-2009, 11:36 AM   #2
Join Date: Sep 2006
Posts: 1,670

Re installing toilet

No adapter I am aware of. If you don't want the hassle of arguing with the person that screwed things up, you will probably need to cut the 3" and add a 3x4 reducer below floor level and then install a new 4" flange.

If you have never made a mistake, you haven't done much.
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Old 11-12-2009, 07:22 AM   #3
Join Date: Nov 2009
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Re installing toilet

Thanks for the confirmation, thats exactly what I did. Seems to woks fine.
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