[maratafat]

This question is in regards to the Washington D.C. area.
Is there a certain angle in which my drain pipe from my sink needs to be to connect to the main sewer drain in the house? I had a plumber come in & tell me my drain line was at to steep of an angle. That doesn't make sense to me, but I'm not familiar with the plumbig building code.

[doug238]

The first thing that comes to my mind is when the drain pipe goes horizontally across inside the wall and then turns directly vertical to go down. I wonder if a 90 degree turn to go straight down is too steep. The code calls for a 'minimum' fall of 1/8" for 3" pipe and above and a fall of 1/4" for 2" and below. If directly vertical is OK what angle do you call too steep?