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Old 07-21-2015, 03:44 PM   #1
ocho
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Interesting thing happened the other day

When long term camping with hook ups i will leave the very tanks open and the black tank closed. I'll drain the black tank once a week or so. Well this time i left the front shower grey tank open and accidentally left the kitchen grey tank closed. I realized this when the kitchen sink wouldn't drain. So go out to pull the lever and notice i have water dipping from the center of the Rv. I have black sheeting that covers the bottom so it had filled that up to a point where it was leaking from a point higher up. Anyhoo my question is this. Is there a overflow vent associated with the grey tank? If it fills up is there safety valve to allow the water to drain? I'm really hoping i don't have a leaky grey tank. Its never leaked and there is no damage to the underside.
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Old 07-21-2015, 03:57 PM   #2
Javi
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Take a look under the sink, a bunch of the trailer have what's called a cheater vent under the sink instead of a vent out the roof. If it backed up to there and the valve is bad it could leak and run down the pipe into the underbelly.
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Old 07-21-2015, 04:00 PM   #3
ocho
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Wasn't wet under the sink area.
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Old 07-21-2015, 04:28 PM   #4
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ocho, Howdy;

Could also be where the vent exits the tank, or a cracked tank...
either way it's a PITA to check.

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Old 07-21-2015, 04:30 PM   #5
chuckster57
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The fitting where the drain terminates into the tank may be a "slip" fitting, and over filling can cause excess pressure and it will seep past the seal.
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Old 07-22-2015, 04:13 AM   #6
byrdr1
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Quote:
Originally Posted by chuckster57 View Post
The fitting where the drain terminates into the tank may be a "slip" fitting, and over filling can cause excess pressure and it will seep past the seal.
Same thing as above.
I saw this one time in years of owning our trailer. I forgot to check the kitchen sink and it over flowed. I have not forgot since.
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Old 07-22-2015, 04:14 AM   #7
ocho
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Quote:
Originally Posted by chuckster57 View Post
The fitting where the drain terminates into the tank may be a "slip" fitting, and over filling can cause excess pressure and it will seep past the seal.
That's what I'm going with. Since I've opened the drain valve for that tank it has stopped leaking. So the integrity off the tank is intact. It has to be up near where the hose drains into the tank.
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