For some strange reason I have a venting line above a window in my basement. There is a 1" 1/2 vent on the left side and 2" on the right side that connects above the window and goes up above the roof. May I use a double 1/4 bend upside down for this? The space is tight for a sanitary T + 90 elbow.
Thanks,
M.
Thanks,
M.