[luqui80]

We are remodeling our kitchen and need to move or sink about 8 feet from the original spot. I'd like to use the existing vent through the roof so that I don't have to make another whole in the roof. I've attached a picture of the setup I'm planning. Will this work since I'm in NJ?

[iamgrowler]

You can't have the vent after the sink drain and you can't have the vent horizontal when it is below the weir of the trap.

Lose the wye and replace it with a long sweep 90, then stack a 2" Clean Out Tee on top of the 90, then a 2"x1-1/2"x1-1/2" Sanitary Tee on the top of the Clean Out Tee and come out of the top of the Sanitary Tee with your vent.

[massplumber2008]

YUP... growlers dead on again. Only reason I am even posting is 'cause I have a good pic. For Luqui... See pic below. You want to do it similar to how you see in the pic. Be sure to add full size cleanout under sink (that is just a rag in the elbow).

I would go with the 2x1.5 x 1.5 tee growler mentioned as well.

[luqui80]

Thanks for the replies, the problem is I have a window above the sink. I don't want to go through the 2x4's supporting the window so I need to work around this.

[massplumber2008]

Hey Luqui... you are either going to go through the cabinets, over to a vertical bay (but I bet dishwasher in way on the right side1 so go to left if going through cabinets)... OR you need to drill through those studs with an extension bit and then run pipe over and up. I have all the bits.. so I just drill and stub through/up and over. Sorry.. that is how it is done... AND it is not a problem in terms of studs... just keep holes under 21/4" max. and pipe vent pitched back toward sink.

OR.. if local code allows you could always install an automatic air vent (AAV) under the cabinet instead (see pic. Below). BUT they are usually only approved in extreme circumstances... which yours is not. But never hurts to call local inspector and ask him (unless you did not pull permits.. then.. don't call him).

Anyway, run pipe like I showed you in pic... except run as I just presented... that will do it for you.

If this helped please RATE THIS ANSWER by clicking on rate this answer at upper right of this post. Do not hesitate to ask anything else.

[luqui80]

Thanks for all the advice. Unfortunately I haven't decided what to do yet. The studs are supporting a major header and I was advised to not go through them. You are correct, I do have a dishwasher to the right of the sink, unfortunately I have drawers to the left of the sink so I don't know if I'll be able to run the pipe through the cabinets until I get them. The AAV would be good but if I plan on selling the house in the future I need to get this done up to code. Any other creative ideas are always welcomed...

[iamgrowler]

Did you check to see if the AAV is allowed by code in your area?

Also, I think you're fretting too much about drilling through those studs -- Major header or not, drilling 2-1/8" holes through those framing members is done all the time without the framing inspectors batting an eye.

The only real qualm I have with this sink location is the height of the existing window -- Correct me if I'm wrong, but the window looks to be about 24" from the sub-floor.

[massplumber2008]

Hey IAM... You nailed that one... luqui is either replacing those windows or he has us all stumped!

Just what do you plan there Luqui?

[jimmychonga1]

Is that wye within 6 feet of the sink? If so, it's a wet vent so why can't he do it that way?

[iamgrowler]

Is that wye within 6 feet of the sink? If so, it's a wet vent so why can't he do it that way?

It isn't a wet vent if it takes off after instead of before the trap arm.

[luqui80]

I finally gave up on figuring this out myself and had a plumber come and do the job. He ran the drain down and put a wye underneath the floor, in the basement. The wye branches off into the vent. The vent pipe runs through my floor joists to go up into the wall and through the roof. The vent pipe is slightly higher than the drain pipe. I have not set up my sink yet but hope everything works well. If there any problems I will let you guys know. Thanks for all your help!

[massplumber2008]

Hey Luqui80. Thanks for the update... we always appreciate that!

Hey, got to ask you if I understood you correctly... did you say the plumber took the fitting for vent off BELOW the floor and then ran vent through the joists downstairs to bring pipe up in the outside wall... but there is no branch that comes off it above the floor for the kitchen sink..

[luqui80]

Yes, haven't connected to the sink and tried it yet though. I hope he knows what he's doing! Does that not sound right?

[massplumber2008]

Sounds like he used the wye set up you presented and we shot down the first time you posted this question..?

Is there a P-TRAP in basement as well as the wye fitting? If so, I don't like it, but it may be considered vented IF pipe coming out of P-TRAP goes through the floor and does not exceed 24".

Otherwise, if P-TRAP not in basement, and If vent does not come off above the ptrap at the sink and then connect into vent stack at least six inches above the level of the sink (or go out the roof)... sink is not vented properly... period!

Unless plumber is planning on using AAV under sink... but then I got to wonder why he ran the vent downstairs, through joists, up wall... for nothing?

Ahhh... well... Good luck with it.

[luqui80]

This is the setup that was left. The vent to the roof is higher than the drain from the wye. It is different than what I had setup originally since the vent is coming out of the part of the wye that branches off, not the back of the wye. Anyway, check it out and let me know what you think. Thanks

[massplumber2008]

Sorry... that is not valid. No licensed plumber would have done this... NO WAY!

I am sure others will chime in soon. Fact is that the trap as presented has no vent... vent must come off above the trap. It is what we have been saying to you all along.

The plumber should have known that. Let me know your thoughts on this. I think it stinks that a plumber came over and did that!

At this point you may need to add that AAV we talked about in other posts... or will need to repipe as we first instructed at the initial posts (review these).

Darn! I was hoping would be better news! Post back... Mark

[luqui80]

Well, that's what happens when you hire cheap help from family I guess!

I was looking into something else, how island sinks are vented. Since the wall is now closed off, because I thought this guy did the job right :mad: , can I run a pipe from the vent after the wye to the sink, loop it up and over the ptrap, right underneath the sink? I've attached an image with the new pipe in red.

I'm in NJ and I don't think that AAV's are code. I've also heard that they can't handle a large amount of water, like for a dishwasher and a disposal, which I will have as well. Any input on that?

Also, where do I attach the garbage disposal? This is something that we have recently decided to add so was not in the original plans, that's why I never asked before.

Thanks again for your continued support!

[massplumber2008]

Luqui:

An island sink vent is as illegal as an AAV at this point.

You need permission from plumbing inspector to pipe an island vent.. I don't think he would approve it either as he could tell that you could have done it the right way to begin with... so... the way I see it, all options illegal at this point.

I have attached a picture of the correct way to install an island vent (click on attachment). Once again, codes vary state to state... but this is excellent picture (from my Mass. Code book) that should help explain how to do this properly (IF YOU CHOOSE TO DO IT! ).

If you do this island vent pipe arrangement please add a full size dandy cleanout (see pic.) at the pipe coming into cabinet and the vent going out of the cabinet (not shown in diagram, but need to be there).

I am not sure if the island sink vent is the greater or the lesser of the two EVILS here... ;).. (comparing AAV to island vent). I will say that lots of people have very good luck with AAVs. The biggest drawback I see is that they can fail on occasion and need to be replaced.

In terms of disposer, I have to guess you have a double bowl sink there... right? If so, just hook disposal and sink together, then install into the trap under sink. The dishwasher will connect into the inlet of the disposal (be sure to knock out the "knock out" plug (use screwdriver).

Decision on island vent vs AAV is up to you!!

Let me know what you think.


IF THIS HELPED PLEASE RATE THIS ANSWER. THANK YOU... MARK

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