Re: inches of fall in a waste line.
Posted by sexton on April 11, 1998 at 10:39:40:
In response to Re: inches of fall in a waste line.
: I know that there is a formula for the proper fall in a waste line, but is there a maximum and minimum ratio
: or is it a hard and fast rule.

Code states not less than 1/4" per foot. Pipe 4" or larger may be run not less than 1/8" per foot if first approved by the inspector. If you run 1/8" per foot your unit loading will have to be reduced.


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