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Old 05-24-2016, 11:14 AM   #1
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Exclamation front grey water tank leaking

Our 2001 Designer is having a massive leak from the belly pan and it seems to be coming from the grey water tank.

we took the tank out and do not see a leak after we filled it with water.

any suggestions?
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Old 05-24-2016, 12:28 PM   #2
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Welcome to the forum.

Seems like the other source(s) would the connection(s) that fill the tank. Before you reinstall the tank, you could plug the drain line(s) to see if there is a leak before it gets to the tank.
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Old 05-24-2016, 01:52 PM   #3
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Before i removed the tank i tried to look over all the plumbing and didn't really notice anything leaking, but after taking the tank off and seeing that it wasn't leaking I'm kinda at a loss. the only way the tank would overflow is back up into the shower and sink correct?
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Old 05-24-2016, 01:56 PM   #4
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What if a leak from a completely different part of the trailer is manifesting there by the tank? It's been known to happen. Water takes the path of least resistance to the lowest point. The origination of the water could be a long way away?
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Old 05-24-2016, 02:00 PM   #5
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I was actually thinking the same thing at first. but it only lacks when the bathroom shower and sink fill up the bathroom grey tank. As soon as i empty the tank the leak stops.
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Old 05-24-2016, 02:15 PM   #6
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Quote:
Originally Posted by pmeger View Post
I was actually thinking the same thing at first. but it only lacks when the bathroom shower and sink fill up the bathroom grey tank. As soon as i empty the tank the leak stops.
Was worth a shot...

If it only leaks when the tank is full, perhaps it's coming from the transition from the drains to the tank?
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Old 05-24-2016, 02:27 PM   #7
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[QUOTE=pmeger;411530 snip... it only leaks when the bathroom shower and sink fill up the bathroom grey tank. As soon as i empty the tank the leak stops.[/QUOTE]

From that description, it sounds like a drain connection at the top of the grey tank or a vent at the top of the grey tank or the top of the grey tank is cracked.
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Old 05-24-2016, 02:32 PM   #8
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From that description, it sounds like a drain connection at the top of the grey tank or a vent at the top of the grey tank or the top of the grey tank is cracked.
would you suggest to try and put some type of sealant on it and try to fix it or just replace the tank and the flanges that connect to the bathroom plumbing?
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Old 05-24-2016, 08:18 PM   #9
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I would replace everything I could reasonably replace. I've tried to use sealants on stuff like this, and it's temporary at best.
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