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Old 08-28-2016, 11:13 AM   #1
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Odor underneath kitchen sink

We have a 2014 Crusader 330MKS and we are getting an odor coming out of the galley tank. I replaced the cap underneath the sink once about 2 years ago. But I am thinking the p-trap should keep odors from coming back. Thoughts?


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Old 08-28-2016, 11:57 AM   #2
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Maybe something in the p-trap itself?
If not, maybe the tank needs cleaning. Might pour some bleach in it, fill it up and let it set for a few hours and then flush out.
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Old 08-28-2016, 12:24 PM   #3
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Do you have one of these vents below the kitchen sink? The occasionally fail open.
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Old 08-28-2016, 12:58 PM   #4
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Do you have one of these vents below the kitchen sink? The occasionally fail open.
X2. Probably your air admittance valve. All your sinks should have one to allow air behind the draining water since in RV's there are no vented stacks out the roof. Look under your sink on the drain line and you should find one beyond the p-trap. It is probably not closing properly.
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Old 08-28-2016, 08:37 PM   #5
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Do you have one of these vents below the kitchen sink? The occasionally fail open.

I do have one of those and replaced it about 2 years ago. Is there any maintenance to it?


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Old 08-28-2016, 08:38 PM   #6
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X2. Probably your air admittance valve. All your sinks should have one to allow air behind the draining water since in RV's there are no vented stacks out the roof. Look under your sink on the drain line and you should find one beyond the p-trap. It is probably not closing properly.

Yep. That is what I replaced. Is there any maintenance to it?


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Old 08-28-2016, 08:47 PM   #7
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No real maintenance . If you are camping, try tapping it with a screwdriver. If not replace it. Relatively easy.
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Old 08-28-2016, 09:01 PM   #8
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Thanks guys.


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Old 08-29-2016, 02:32 PM   #9
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If you have a length of horizontal waste pipe between the sink drain and the trap, sediment can settle on the pipe and cause an odor. If you can find no other reason for the odor, take it loose and run a rag through it to polish it up.
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Old 08-29-2016, 05:23 PM   #10
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x2 on the air admittance valve replacement....also always keep a few gal of water in the galley tank...I found out how bad it can smell when there's little/no water in there.
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