Plumbing Advice - New Drain


  #1  
Old 09-25-21, 10:41 AM
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Install Washer Drain in Utility Room

I have a two-story house that was built in the 80's and sits on a concrete slab thus no basement. I want to put a washing machine in my utility room. However, the rooms does not have a drain. Since the house is on a slab it seems my only alternative is to pump the water up 8ft and exit through the utility room to the garage. Then from there tie into a drain that's in my half-bath area.
The image below highlights what I'm planning to do.
Does this seems reasonable? Can I tap into that vent pipe that I exposed in the garage?

I'm not sure if this is to code. I appreciate any recommendations or alternate ideas for this project.





Thanks
 

Last edited by kirmool; 09-25-21 at 01:02 PM.
  #2  
Old 09-25-21, 01:04 PM
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Can an admin or moderator move this post to the Plumbing and Piping forum? as I have realized I posted to the wrong forum.
 
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Old 09-25-21, 02:26 PM
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I would run the pipe under the doorway to a pump below the wall opening rather than up and over. Others will chime in about tying into existing pipe i'm sure.
 
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Old 09-25-21, 05:14 PM
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The pump needs to be close to the washing machine which will be in the utility room.
 
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Old 09-26-21, 04:55 AM
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Pretty sure that the minimum drain size for a washing machine drain is 2" now, and many vents are 1 1/4". Also pretty sure you have to consider the number of drains vented through that pipe and their sizes to determine the minimum size. Not a plumber, but I'll bet the answer will be no.
 
  #6  
Old 09-27-21, 10:02 AM
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I am wondering if you can run the 2" washer drain below the doorway, and just build a little wooden step/platform to cover it. Then tie it into the drain.

Can you confirm whether the sink drain is 1.5" or 2" where it goes into the slab? As ThisOldMan stated, washers require a 2" drain.

Otherwise I think a pump and drain like you have it drawn would be okay. Check the output size of the pump, most are 1" as far as I know. You'll also need an atmospheric vent (one that goes up to the roof) for the pump, an AAV won't work.
 
  #7  
Old 09-27-21, 10:25 AM
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Zorfdt The sink drain is 2" and it also goes down into the slab only the vent above it is 1.5".
 
 

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