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Old 12-26-2014, 07:52 AM   #11
Tim & Lisa Trempert
Join Date: Sep 2008
Posts: 397
How do you know it is empty? Do you have a clear elbow? I thought I had an issue but it turned out the water had completely filled the hose but was still flowing, making it silent. Leave your valve open for another few minutes after you think it has stopped and see what happens.

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Tim & Lisa
2011 Georgetown 350
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Old 12-26-2014, 09:33 AM   #12
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Location: Wherever we are parked!
Posts: 423
X5 on the saw hole plug! Been dealing with it for 3 years! My solution was to install a twist on third valve on the hose connection out side the wet bay. When the gray blocks up I ensure the gray valve is open...close the newly installed third valve and open the black valve for about three seconds. The black water, assuming you had some in the black tank, forces the "air bubble" trapped between the three valves up through the gray valve and blowing the plastic disk away from the opening. You will hear the effect that is happening as a loud bubbling. Now ensure that the black is closed and open the third, exterior, valve and WHOOSH...the gray drains. If you have a problem with a little black water perhaps getting into you gray tank you can always drain the black and fill with fresh water from the tank flush system before performing the procedure. It's a pain in the butt but it's better than spend a lot of bucks on having the belly opened up at a dealer to try and get it fixed!

2011 Georgetown 378TS in FireMist
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Kirby the Old Dog, passed but still in our hearts
Max E. Dog, the new pup
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Old 12-26-2014, 01:12 PM   #13
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Join Date: Oct 2014
Posts: 181

Originally Posted by rockfordroo View Post
That sounds like the campground sewer line isn't properly vented.
Made sens to me so I unscrewed it from the campground line to let the air in open the trap water flow for good for a bit then start coming out of the campground line, thought the line was plugged called maintenance they unplugged it and now working like new. Thanks for the tips.
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Old 01-10-2015, 03:58 PM   #14
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Location: crete,il /texas
Posts: 267
my dealer told me to use liquid digester in the tank
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Old 01-10-2015, 09:07 PM   #15
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Join Date: May 2012
Location: Texas
Posts: 607
I have had the same issue with the gray tank every now and then, I purchased a back flush system and back flush the gray and it works great. I keep the gray open when we are at full hookups and never have issues until we close it off and travel then I may have to use the back flush system to completely drain. Not too bad cus when I do the gray I can also do the black and I know that its completely clean.,,,

Andrew & Donna Reyes
2012 Georgetown 378XL
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grey water, water

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