All plumbing whether going down (sanitary sewer) or up (venting)
can make turns and joints. The fittings must all be sanitary
fittings, not pressure fittings that make sweeping turns that
solids and sewer cables can maneuver.

A very old method of inspection was to drop a ball into the piping
to see if it would come out on the down hill end. I've not ever
seen it, it may be a myth, but the concept is accurate.

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Keep the whole world singing . . . .
DanG (remove the sevens)




"benick" wrote in message
...
Can vent pipes have elbows or do they have to go straight up
through the roof??? Thanks for any help....