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Old 01-24-2017, 03:46 PM   #1
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Kitchen sink not draining

We checked the trap and it's clear. Read somewhere that the air admittance valve may be the issue. We have a Sierra bunk model. Bathroom and shower drain no problem.

Anyone dealt with this before? Our sink is on the island peninsula
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Old 01-24-2017, 03:50 PM   #2
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We checked the trap and it's clear. Read somewhere that the air admittance valve may be the issue. We have a Sierra bunk model. Bathroom and shower drain no problem.

Anyone dealt with this before? Our sink is on the island peninsula
Sounds like the Studor Vent could be bad. It should be visible under the counter. You will probably have to cut the old one off the pipe and go to the hardware store to get a new one and glue it on.
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Old 01-24-2017, 03:56 PM   #3
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We took the vent off that was under the sink and it drained fine for a few minutes and then backed up again. Would snaking be the next step?
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Old 01-24-2017, 03:59 PM   #4
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We took the vent off that was under the sink and it drained fine for a few minutes and then backed up again. Would snaking be the next step?
If you took the vent off and it still backed up, there is either something in the vent pipe, or something in the drain. The purpose of the vent that you took off is to allow air into the pipe for it to drain, but not allow the gases back into the living space. DO NOT leave it off or you'll end up with a living space full of tank stank!
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Old 01-24-2017, 04:07 PM   #5
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We took the vent off that was under the sink and it drained fine for a few minutes and then backed up again. Would snaking be the next step?
Are you sure you have the grey tank valve open for the kitchen ? if it drained for a few minutes then backed up you may have a blockage at the tank
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Old 01-24-2017, 04:54 PM   #6
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Thought right away of 'crap in the trap' but sounds like crap in the line somewhere. Draino maybe?
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Old 01-24-2017, 10:19 PM   #7
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Update: we have done Drano AND a 25ft snake. We did it down the pipe and the roof vent. STILL will not drain.

I'm at a loss. What I going on?? As far as we know, we don't have a 2nd gray tank for the galley. We full time in ours and had it maintenanced a week ago. No issues until yesterday
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Old 01-24-2017, 10:25 PM   #8
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I guess it goes without asking....is the tank full?


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Old 01-24-2017, 10:27 PM   #9
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No, gray tank is always open since we have full hookups. Gray tank says empty but galley says full. We haven't found a galley valve or anything
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Old 01-24-2017, 10:48 PM   #10
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Are you positive on not having a separate galley tank?

Our crusader has two gray tanks - one is marked galley on the panel and the pull is further back on the driver side close to the tires - double check there

Our other is marked gray on the panel - it is for bath and washer hookup


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Old 01-24-2017, 10:52 PM   #11
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We've been in this thing since July. I don't know how we wouldn't have noticed it. Only thing that could have happened, if there is one, would be the techs may have closed it when they had it in the shop? Otherwise I don't get how we would miss that. Hubby is gonna go double check for a hidden valve.
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Old 01-24-2017, 10:53 PM   #12
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Our valves to open and close are in a compartment under the bedroom slide. Would they really put it elsewhere?
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Old 01-24-2017, 11:03 PM   #13
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Check up high on the frame all the way down the driver side - under all the slides and around the wheels

It has to be there somewhere !!


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Old 01-24-2017, 11:04 PM   #14
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How far back could it be?? He went and looked and couldn't find anything. Could it be in the underbelly??
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Old 01-24-2017, 11:09 PM   #15
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Most likely betwen the bunk slide and kitchen slide


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Old 01-24-2017, 11:10 PM   #16
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Is it going to look like the other valves? Or what should we look for?
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Old 01-24-2017, 11:11 PM   #17
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Look at this thread, post #7.

http://www.forestriverforums.com/for...nk-124673.html
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Old 01-24-2017, 11:12 PM   #18
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It should not be in underbelly ...unless they totally messed up during construction

Do you have only one outlet for the whole rig? As in all the drains run to same opening or is it possible to have a separate outlet as well for only the galley

Most rear kitchen units have a separate pull AND outlet for galley tanks


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Old 01-24-2017, 11:13 PM   #19
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Great post 👍🏻. Should be exactly what they need to find


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Old 01-24-2017, 11:16 PM   #20
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It should not be in underbelly ...unless they totally messed up during construction

Do you have only one outlet for the whole rig? As in all the drains run to same opening or is it possible to have a separate outlet as well for only the galley

Most rear kitchen units have a separate pull AND outlet for galley tanks


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One spot where black and gray tanks drain to sewer hose. We literally had NO IDEA we had a galley tank!
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