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Old 02-07-2014, 04:52 PM   #1
Gr8Sl8
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Default Kitchen sink drain won't drain.

So I have a rather long story about my kitchen sink. I moved into my house about a year ago. From the time I moved in I've wanted to move the kitchen sink to be in front of the window because to me that's where it makes the most sense. I'm on a slab concrete foundation so I knew the "right" way to do this was to have someone come out and jackhammer up the concrete and move it over to where I wanted it. After hearing the price to move it about 9 feet I decided there was no way I was going to do it that way. I decided I was going to DIY it and go through my studs. It is on an exterior wall, but before everyone grills me about it freezing, I will take the proper measures to make sure that doesn't happen before I put the drywall back. So I cut all the studs and get the pipes in and glue them up and run it. I had about a months worth of dishes piled up so it took me a good hour to do them all. 30-40 minutes in not a single leak and its draining like a champ. Well I look in the corner at one my sweep elbow joints and its got a drop of water on the paper towel I put under all the joints so I could see the leak. After about 10 more minutes another drop. I decided any drop was too many so I cut it out and put a new elbow on. This time something happened to were it wouldn't drain. I looked at the pipe coming off my p trap and it looked to somehow be on a incline. I don't know how it happened but I know water doesn't like to travel up hill so I cut that out and redo it. After my third attempt I turn the water on and it drains properly for about 10 seconds then starts to fill up. After the water is shut off it doesn't take long for it to catch up and drain it so it is draining it. I can't figure out why it's draining so slow everywhere I look it appears to have enough slope. I know the question will come up about venting. It has a vent next to the drain location. I thought about this being the issue but the first time I had it going before I got the tiny leak it seemed to drain just fine. Please if anyone has any tips or suggestions on why this might be happening I would greatly appreciate them.



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Old 02-08-2014, 10:42 AM   #2
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I think you have exceeded your vent & slope distance for 1 1/2'' trap/piping. The max distance from the trap to vent is 3'6'' to 6' depending what codes you are under.



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Old 02-08-2014, 11:05 AM   #3
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I'm not a plumber, but I've found that sometimes posting photographs of your plumbing can help the experts to spot problems.
Are you able to take a picture from different angles and post it so people can take a look and see if they spot something wrong?
Hopefully someone will be able to help you then.

Edit: I starting posting this before I saw IFIXH2O's post.

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Old 02-09-2014, 02:34 AM   #4
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I did take them I tried to upload them the first time but they didn't work. I'll try it again. I think IFixH20 might be on to it. I'm going to try an air admittance under and see if it helps. IFixH20 are you saying I can only go so far with my slope? Or that the only issue being is my vent is just flat out too far from my p trap?

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Old 02-11-2014, 12:00 AM   #5
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Gr8sl8, No offence but I think you should have let the plumber do this one. You have lots of NONO's

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Old 02-11-2014, 08:30 PM   #6
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I forgot to reply, but keep in mind that AAV's (air admittance valves) have to be accessible as there can be mechanical failure, and not all jurisdictions even allow them. They violate code in some places.

IFIXH2O, I know it would take time, but could you list the no nos? I'm curious.

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Old 02-12-2014, 04:58 AM   #7
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I'm curious at the nono's also. The air admittance valve will be right under the sink and have access to it. It's not against code and they are used frequently here. I talked to a very experienced plumber who's in the pipe fitters union. He told me to do the air admittance vent. He said it should work just fine I showed him the pictures, his only concern was how long of a run it is they are prone to clog. Another plumber said it looked good he was more so concerned with how many couplings I used. He thought it would have been better to cut out the wood and use a long pipe and restructure the studs. Neither of them sounded to concerned though.

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Old 02-12-2014, 07:21 AM   #8
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I will agree with the other plumbers about the run is too long and the uses of too many ferncos & short pieces of pipe, but if that's all they said, then I say WOW. No mention of the J.Guest push fit fitting inside the wall - No pipe strapping (water lines will have movement) - The pvc sweep in the corner looks like no cleaner/primer was used unless clear was used - The drain line appears to run up & down hill at the 2nd stud to the left of cabinet - We use band coupling inside of closed walls and we would have used a pvc no hub adapter to transition the pipe - No stud guards - The 1 1/2'' plastic nut at the basket strainer is prone to leak.

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Old 02-12-2014, 04:33 PM   #9
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I haven't put the guards on yet. That's all. It appears to go up and downhill but it's just the picture. It does have a point where it doesn't go downhill as much. It is clear primer on the sweep I accidentally kicked my purple primer over. And yes that plastic nut does leak. The guy at Lowe's swore to me it wouldn't. I'm going to switch that out I didn't glue it for that reason. Can you show me what the band couplings look like and the no hub adapter? Why the pipe straps on the water lines? Is it to prevent them from rattling around. If that's the case they don't make any noise. Keep in mind that I can always fix these things. I didn't put up the drywall for a reason.

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Old 02-14-2014, 02:09 AM   #10
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In my opinion that drain is too far from your vent, I'd recommend you don't use an AAV. Your wall is already open, cut up a few more feet and cut in a t wye upside down in your vent and bring it over a few feet so that you don't exceed your 6' max. Your probably only long 2-3 ft anyways. Reason you secure water lines isn't for aesthetics, it's so your pipes don't sag and aren't stressed. You might think it's ok but it's not what you want to be doing. If that's loose it's opening up an opportunity for them to fail.



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