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I am moving my washer and dryer up to my second floor. I plan on using a tray with a floor mounted shower type drain. Will there be enough room in the joist bay below to join the tray drain and the stand pipe first AND use a p-trap? Do they make a special joint for this?

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Oh, I see now with code, apparently the stand pipe trap has to be in the wall, not below the floor. If I have to use a separate trap for the tray drain, it will dry out. So this is not doable is it? – Evil Elf Oct 8 '13 at 14:59
It is an issue with overflow tray and floor drain traps that they dry out. That does not make them non-doable. It only means some occasional maintenance is required in the form of running water into the traps once in a while. Better than having an overflow ruining a good part of your house. – bcworkz Oct 8 '13 at 19:37

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