Wash basin in Garage Drainage Question

amdspitfire

My wash basin's drain pipes in the garage is ABS plastic then clamped with sleaves to a metal pipe through the wall, then I believe back to abs underneath the house.

Is this code? Can I go with abs through the wall?

Also it's got an exhaust vent through the wall and a P-trap, does it need both?

Mike Swearingen

I'm not a pro plumber, but the answers to all three of your questions are yes.
Mike

amdspitfire

bump for another response, it would be easier to go straight ABS through the wall

JDC

Yes, you can go through through a wall with ABS. In certain situations we put in a sleeve for the pipe to go through (ie concrete walls, block walls, foundation walls, etc). If its just a drywalled stud wall then no sleeve is really necessary.

Yes, you do need a vent. This allows air into the plumbing system. Ever hold your finger over the end of a straw and try to get coca-cola to drain out?

Yes, you do need a p-trap. This keeps sewer gases out of your dwelling. If you didnt have one you'd swear "it smells like open @$$ in here!"

So, like Mike said, "Yes to all three"