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Old 06-22-2016, 08:07 PM   #1
Join Date: Sep 2015
Location: Valley Forge, PA
Posts: 87
Leaking from Grey water tank?

Hi all,
I'm hooked up and I noticed water dripping from the belly pan under the gray water tank while I was walking back to the TT. My daughter was taking a shower, and I immediately opened the drain valve and a good amount came out but nowhere near 32 gallons. I made a small hole in the plastic belly pan to get the water out. So now whenever the drain valve is closed, it continues to drip from the same spot even with just a couple of gallons in it...definitely nowhere near it being even a 3rd full. With the drain valve open and water running, no drip. I don't like leaving it this way, but it least it doesn't drip. The belly pan prevents me from seeing what's going on up there. I called Jayco and am waiting to hear back, but the guy says he hadn't heard of this before but said possibly a vent problem (vent is blocked and opening the valve breaks the vacuum, but I don't buy it).

This is the first time its happened to me and we've been camping all week on the way to Grand Canyon. Any ideas? Only thing I can think of is the camper is slightly lower on the left side, but by no more than a half inch. I was just too lazy to drive onto a leveler after the long days drive.

Any ideas or insight would be appreciated.

Thanks for any replies,


2014 Jayco Jayflight 264 BH
2009 Tundra 5.7 Crewmax w/ Tow Package
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Old 06-23-2016, 04:05 AM   #2
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Posts: 24
My guess would be leak where the drain pipe connects to the tank. With the valve open no water lays at that connection. Flows to the path of least resistance.

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Old 06-23-2016, 09:19 PM   #3
Join Date: Sep 2015
Location: Valley Forge, PA
Posts: 87
Any takers?
2014 Jayco Jayflight 264 BH
2009 Tundra 5.7 Crewmax w/ Tow Package
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Old 06-23-2016, 09:56 PM   #4
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Join Date: Oct 2012
Posts: 605
Could be any number of things. Poor joint, crack in the tank bad valve. Assuming it is a new trailer warranty will cover it. I would leave the valve open during heave use like showers.

Don't loose sleep over it it will be corrected. If not under warranty then it is a pretty straight forward fix ince you get the under belly section off around the tank/valve. Been there done that. Enjoy your vacation and worry about it when you return if it was black tank it would be a whole nother story.
2016 3500 6.7L DRW
2011 Starcraft 329BHU TT
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leak, tank, water

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