Is a 2" drain line big enough for a washer?


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Old 02-13-19, 05:39 AM
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Is a 2" drain line big enough for a washer?

Putting a new drain line in for my washer, I was going to run a 2" drain line down the wall to put the washer hose into. If I run a 2" line down my wall and 30' across my basement to the sump pump will that 2" line handle all that water or will it back up over the top of the pipe? I could also run 2" down the wall into a 3" pipe across my basement if it's better doing it that way..
 
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Old 02-13-19, 07:45 AM
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2" is the minimum size required by code and I have never heard of it not being adequate. People used to run 1 1/2" and it mostly worked. With new water saving washing machines it's not as big a deal as they use so much less water.
 
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Old 02-13-19, 08:20 AM
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You will just need a vent within 5 feet of the fixture to prevent the trap from being siphoned.
 
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Old 02-13-19, 05:16 PM
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You're going to dump your washer into a sump pit ?
Be sure to filter for the lint or your pump will become clogged.
 
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Old 02-15-19, 06:31 AM
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It was just an idea I had, I may just run the washer hose in a utility tub. I'll be sure to put a lint screen on too, thanks...
 
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Old 02-15-19, 02:45 PM
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Either solution will work. 2 pipe is code approved for any length you might run into in a residence.
You can also dump into a utility sink and use 1.5 from there.
I personally like the 2 standpipe, the soapy water discoloration the wash tubs after a while... but whatever works for you!
 
 

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