My washer appears to be vented incorrectly. I do not know if there is a "p" trap in the wall/crawlspace and cannot access from under the house. Looking for advice on how to vent correctly and do I need to tear wall open to see if there is a trap or not? You can see in image that the vent is up the left side of the wall and the drain is in the wall after the vent. [@#$%&[postimg.org]][/url]

if you remove the drain hose and stick a small flexible wire into the drain you should hit the trap. if the wire comes back wet then there is a trap. if you are worried about a vent, measure how long the wire went into the pipe and cut an access panel at that point. if you don't know what you are looking at, take a photo and post it here. someone will tell you yes or no as for a vent.

What is outside the wall tells us nothing about what is inside the wall, so we cannot help you.

Depends on how old is your house. I do not have a vent for the washer either. You can however probably install one of those special vent caps and not have to run a vent pipe all the way out.

P.A.R.E (Pipe Abuse Resistance Education)

My guess is there's no trap. It looks like the cleanout and vent tee is directly below the standpipe.

Are you having problems with the drain? What brought on the questioning of the venting?



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steve, if you are referring to the photo looking thru an access panel, I posted that as an example of access doors.

No, in the OP's pic, the top of the standpipe looks to be plumb with the vent takeoff/CO. So I would think there's no trap, unless the standpipe offsets to the side, to allow a trap along side of the horizontal drain.