tlfamm
New Member
In the process of converting the clapped-out CI DWV system in my 100-year-old house. Planned on a 3" toilet drain line fitted into a 4" SanTee in the 4" stack, using a 4 x 3 reducing coupling. (In the first-floor ceiling)
Then I got a look at the structural butchery used during the original CI installation: 20" of floor-joist removed ('patched' with a 2 x 2.5 x 24 scab), and cracks in the tile under the toilet. So, I need to sister the floor-joist, but any repair will interfere somewhat with the hub of the 4 x 3 reducing coupling. Space is at a premium.
Is a 4 x 3 reducing bushing an acceptable alternative to fit the 3" horizontal toilet drain line?
Note: a 4 x 4 x 3 SanTee is not an option in this case.
Then I got a look at the structural butchery used during the original CI installation: 20" of floor-joist removed ('patched' with a 2 x 2.5 x 24 scab), and cracks in the tile under the toilet. So, I need to sister the floor-joist, but any repair will interfere somewhat with the hub of the 4 x 3 reducing coupling. Space is at a premium.
Is a 4 x 3 reducing bushing an acceptable alternative to fit the 3" horizontal toilet drain line?
Note: a 4 x 4 x 3 SanTee is not an option in this case.