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-   -   Plumb Washer & Laundry Sink Into Existing Stack (http://www.diychatroom.com/f7/plumb-washer-laundry-sink-into-existing-stack-120913/)

hammerlane 10-22-2011 10:32 AM

Plumb Washer & Laundry Sink Into Existing Stack
 
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Want to install a laundry sink and washer as shown in the photo. Can I just remove the existing 4"-T from the stack, replace it with a "Double Sanitary T", use one tap of the San T as a clean-out and the other tap as the run for the sink using a wye then onto the washer?

Also will I not need a vent for the sink/washer since it will be close to the stack?

Check out photos and let me know your comments of a better way

VIPlumber 10-22-2011 07:26 PM

That'll definitely work. What I would do though is stack 2 sani 90's on top on each other, cleanout (facing out) on the bottom and the drain (hanging a left) above.

hammerlane 10-23-2011 06:03 AM

I like that suggestion about stacking the San-Ts. How would you go about venting?

oh'mike 10-23-2011 09:13 AM

If your washer drain box is within 5 feet of the stack --no additional vent will be required---

One of the licensed plumbers will correct me if I steered you wrong.--Mike---

VIPlumber 10-23-2011 11:40 AM

I pulled my code book so I could give you an exact answer. The maximum length for the trap arm (drain from washer to stack) is 2.4m (7' 5"-ish) assuming you're using 2" pipe as the drain.
At least up here it is, your local codes may vary so you might want to ask the local authorities to be certain.

hammerlane 10-23-2011 12:33 PM

I'll check with our local inspector on that. Would be nice to not have to do the vent,

ben's plumbing 10-23-2011 08:07 PM

hey guy nice drawings...yes this will work and i believe in ohio if you are within 6' of stack you don't need vent....I would cut a tee under the existing clean out and be done with it....

hammerlane 10-24-2011 07:41 AM

Ben...when you say tee....you mean a wye-T correct.

And it does not matter that the cleanout will be slightly ABOVE the wye-t. Or should I rearrange and put the cleanout lower than the wye-T

oh'mike 10-24-2011 08:02 AM

You will be fine either way---t or y---however,I like VIPs suggestion--having the clean out T facing out will make servicing the line easier---and will be in the correct place if the wall is ever studded out for a finished room.

ben's plumbing 10-24-2011 06:14 PM

Idid mean tee it seems to be eaiser for the do it your selfer...however mike and vip also make a good point about possible finish work and access . if your not going to build wall and finish off you should be fine...

hammerlane 10-25-2011 08:19 AM

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Does this look up to par...or at least a bogey??

oh'mike 10-25-2011 09:32 AM

Yep---start cutting---

hammerlane 10-26-2011 07:42 AM

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Do you think I need the re-vent since the sink stub out will be only about 24" from stack?

If I can eliminate the re-vent, I could take fitting #2 and rotate it so the branch of the T-Wye is the stub-out for the sink and then the run of the T-Wye would go and pick up the P-trap for the washer standpipe.

How does this sound?


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