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Toilet Drain Line Offset

10 years ago

IÃ¯Â¿Â½m going to remodel a bathroom in our 50-year-old house. The existing toilet hub is only 12" on center from the left side wall rather than the required 15". The 3" drain drops straight down and then elbows horizontally below, and perpendicular to, the 12" floor joists. An existing large sheet metal duct prevents moving the line in the direction it needs to go to get the 15" clearance. I don't want to use an offset flange. Would it be acceptable to offset the vertical pipe in the 12" depth between the joists to allow moving the hub 3" from its current location? Thanks, Bob

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Comment (1)

bus_driver
10 years ago
The space for piping changes is limited, both vertically and horizontally. I suggest that you build a wooden box frame with those dimensions, buy a few fittings and a length of pipe for a few dollars and see if the changes you need can be done within the available space. Do this on a workbench before disturbing the present installation. Elbows of 45 deg are readily available. 30 deg and 60 deg may be less likely to be in stock. Use two elbows of equal angle for the offset.
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