Hello, just wondering if I can install an in-floor drain that taps into the standpipe drain I already use for my first-floor washing machine. The standpipe runs directly behind, then underneath the washer (underneath the floor board)--there's room enough to work under there--I checked.

I want to add a drain directly below the machine in case of leaks/disasters, etc. I'm guessing I have to add a p-trap below the new floor drain and then tap into the 2" standpipe? Is that OK? As an alternate idea, can I do the same if I instead add a spill tub under the machine first, so that there's no chance of the water missing the drain (in the spill tub), that's directly below the machine?

In either case above, do I also need to, or should I also install a one-way valve somewhere in the 2" drain pipe--is that necessary? Please advise. Thanks! ;o)

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Originally Posted by salb222

Hello, just wondering if I can install an in-floor drain that taps into the standpipe drain I already use for my first-floor washing machine. The standpipe runs directly behind, then underneath the washer (underneath the floor board)--there's room enough to work under there--I checked.

I want to add a drain directly below the machine in case of leaks/disasters, etc. I'm guessing I have to add a p-trap below the new floor drain and then tap into the 2" standpipe? Is that OK? As an alternate idea, can I do the same if I instead add a spill tub under the machine first, so that there's no chance of the water missing the drain (in the spill tub), that's directly below the machine?

In either case above, do I also need to, or should I also install a one-way valve somewhere in the 2" drain pipe--is that necessary? Please advise. Thanks! ;o)

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Adding a floor drain is overkill. But if you wish, get one with a built in trap.
We install a washer pan under where the washer sets and run a 3/4" PVC drain line outside or to the nearest floor drain. Washers aren't like water heaters that burst a weld in the boiler and dump 40 gallons of water in your basement. Washers develop seal leaks that trickle out from underneath. In my opinion I think you're worried needlessly. A check valve in the standpipe is not recomendedat any time. Good luck, Tom

Hey, that's not a bad idea at all to just run a pvc to the outside. The location where I'm moving the washer is very close to the outside of the house. Thanks again!