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Author:
boburban (PA)
Why is the p-trap for a washing machine standpipe supposed to be 6 to 18 inches above the finished floor? The p-trap for my current standpipe is in the basement directly below the washing machine, about 6 inches BELOW the finished floor. Thanks for explaining why this matters.
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Author:
hj (AZ)
when the standpipe is too long, the water builds up velocity as it flows down the pipe. This velocity will cause the water to flow through the P trap instead of staying in it, thus making the trap useless.
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Author:
Pipe runner (AZ)
I think the minimum distance above the floor has something to do with being able to service the trap.
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Author:
hj (AZ)
Who "services" a washing machine trap, ever?
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Author:
george 7941 (Canada)
The discharge from the washing machine does not have an abrupt cut-off, towards the end air mixes in and the volume of water flow tapers off. I don't see any danger of the trap being not full at the end of the discharge cycle.
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Author:
hj (AZ)
He asked a question and it was answered. As a practical matter there are MANY things that do not conform to code but work anyway.
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