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Old 11-21-2011, 03:36 PM   #16
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Draining laundry sink into washer stack?


Double traps are prohibited by all plumbing codes and jurisdictions that I am aware of. There are also prohibitations on the vertical hieght from the drain to the trap, which your washer stack would presumably be in violation of. But if you are all hell bent in doing things improperly, go for it baby

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Old 11-21-2011, 03:54 PM   #17
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Draining laundry sink into washer stack?


Code restricts the vertical distance between a fixture outlet and the trap weir to 24 inches. Vertical lengths that exceed that maximum length can lead to selp siphoning of the trap. In the photo it easily looks as if the vertical ABS is about 30 inches before it goes thru the floor.

Last edited by hammerlane; 11-21-2011 at 04:02 PM.
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Old 11-21-2011, 04:01 PM   #18
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Draining laundry sink into washer stack?


It doesn't matter what we tell her. She wants to do it her way, right or wrong.
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Old 11-21-2011, 04:10 PM   #19
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Draining laundry sink into washer stack?


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Old 11-21-2011, 04:15 PM   #20
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Draining laundry sink into washer stack?


Alright, let's be a little less condescending? I go into many houses that have this exact setup for a washer machine drain. I know that now you have to have the trap for a washer above the floor with a san tee and a vent thru the roof, but 20-30 years ago you did not have to. And those systems still work. I see it all the time. Now lets talk about something we can all agree on: like abortion, or the best color
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Old 11-21-2011, 04:19 PM   #21
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Draining laundry sink into washer stack?


I agree it will work.
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Old 11-21-2011, 04:28 PM   #22
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Draining laundry sink into washer stack?


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I know that now you have to have the trap for a washer above the floor with a san tee and a vent thru the roof, but 20-30 years ago you did not have to
Probably not. I have had this conversation multiple times with my father, who was a plumber starting in the late forties, through running one of the bigger union plumbing contractors in Seattle into the seventies. In his systematic knowledge of the plumbing codes, it has always been a requirement to vent every trap. So if a washer drained into an un vented trap, it was because it was jack legged in, or is serviced by a vent you are unaware of broox. It has always been a code requirement to service a trap with a vent, and to imply otherwise is probably in error
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Old 11-21-2011, 09:57 PM   #23
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Draining laundry sink into washer stack?


Ok...let's get something straight here gentlemen- I do want to do this the right way...not 'my way'. I don't have a 'way', which is why I'm asking.

My house was built in the 40's, so code was proabably different then, right? It sounds like the washer trap should be above the floor, not below. That's fine, I can move it up to within 24". Then I won't need one on the sink, correct? I know 2 is against code- I did read that somewhere.

So, it'll look like this- washer drains into the side near the top, then the sink drains in just below the sink, then the trap just above the floor. There IS a vent in the wall for the kitchen sink in the room on the other side of the wall. It hooks in to this pipe under the floor.

Does that work for everyone? Is it acceptable, and will it work?
Final answers please....

Last edited by glamgirrl; 11-21-2011 at 09:58 PM. Reason: spelling
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Old 11-21-2011, 10:26 PM   #24
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Draining laundry sink into washer stack?


Alright Glamorgirl. Have you seen that cartoon with the guy on the computer and his wife asks him if he is coming to bed and his reply is "I can't, there is someone wrong on the internet." I am afraid this post might devolve into that.

Again, I think your original plan will work and work well. If it does not, you can spend all the extra time and money to do it the much more involved way. Good luck
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Old 11-21-2011, 10:38 PM   #25
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Draining laundry sink into washer stack?


Quote:
Originally Posted by broox View Post
Alright Glamorgirl. Have you seen that cartoon with the guy on the computer and his wife asks him if he is coming to bed and his reply is "I can't, there is someone wrong on the internet." I am afraid this post might devolve into that.

Again, I think your original plan will work and work well. If it does not, you can spend all the extra time and money to do it the much more involved way. Good luck
I couldn't agree more.
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Old 11-22-2011, 09:10 AM   #26
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Draining laundry sink into washer stack?


This setup would not be hard to do:

Also what is your vertical distance from where the washer drain hose enters the ABS to where the trap is in the basement?
Attached Thumbnails
Draining laundry sink into washer stack?-new-bitmap-image2.jpg  

Last edited by hammerlane; 11-22-2011 at 09:14 AM.
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Old 11-22-2011, 09:28 AM   #27
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Draining laundry sink into washer stack?


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This setup would not be hard to do
You would also remove the existing trap under the floor if you were to do as hammerlane suggests
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Old 11-22-2011, 09:38 AM   #28
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Draining laundry sink into washer stack?


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You would also remove the existing trap under the floor if you were to do as hammerlane suggests
I forgot to put that in the above post but assumed it was obvious.
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Old 11-22-2011, 09:45 AM   #29
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Draining laundry sink into washer stack?


No, your diagram is very good. The (bottom) wye should also be replaced with a sanitary tee. As it is presently drawn, it looks like you end up with a de facto "S" trap.

But again, a very fine depiction of what should be done to do it totally correct
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Old 12-30-2011, 01:42 PM   #30
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Draining laundry sink into washer stack?


Thanks Hammerlane! That diagram really helps! And it's nice to know what an 'AAV' is too...LOL

I can do as the diagram suggests, but the washer standpipe will have to be closer to the the current straight pipe- I don't have a a lot of room to work there. One question though- how is the washer standpipe supported? Do I strap it to the wall or something? Surely it needs some support somehow?

Thanks,

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