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Old 07-25-2015, 01:01 AM   #1
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Gray tank not dumping

We have a Georgetown 364 TS (2016), been on the road about 6 weeks and have had problems with the tank sensors like everyone else, but we've been dumping the gray and black tanks frequently.

Last night I noticed the 1st (main) bathroom gray tank was emptying slowly, normally I get a rush of water when i pull the value, but this time it was trickling and took all night to drain to 1/3. The main black tank rushes when i open the valve, as so the other second set of gray and black tanks for the master bathroom.

I went to try and dump the black and gray tank tonight, and now the gray tank is hardly draining, no problem with the black tank. Obviously have a blockage of some type, just not sure how to fix. I tried using the toilet cleaner solution, but that's not helping at all. Also, i don't seem to have any blockages in the drains. The kitchen sink, main bathroom sink and shower drain just fine, so the issue must be in the gray tank and/or the dump release value.

Any advise would be appreciated.
Raj.
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Old 07-25-2015, 08:31 AM   #2
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Check vent going to roof for blockage. Are you sure the valve is opening all the way?
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Old 07-25-2015, 08:50 AM   #3
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That's a good idea first check the roof vent, If it's not that then your valve is not opening all the way. They do make a lubricant that you dump in the drain and it is used to lube the valve. Try to run some water down your vent pipe just in case something is blocking it you just never know. If the vents not clear or dropped into the tank you will not drain it.
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Old 07-25-2015, 10:33 AM   #4
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Have heard that when they cut the hole in the tank that sometimes they let that hole material fall into the tank. It then can block drainage. If your problem is not your valve try a back flush using a flush king or equivalent to move the blockage. Maybe you can push some kind of flexible cable up the drain while open. Just get ready for a flood of water if you un clog it.
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Old 07-25-2015, 10:51 AM   #5
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No luck with the roof vent

I checked the rood vent and it's clear, i can see water at the bottom. Also the valve is fully open, also feels like it's in the same open position as a few weeks ago, so I don't think it's stuck. Water is trickling out very slowly still, so it's draining, but it takes all night to get to 1/3.

one note "Evereddie" mentioned is that a few weeks ago the 2nd (master bathroom) black tank value got stuck. I had the RV at a service center installing a breaking system luckily and they fixed the problem. They found a piece of cut out wood that had blocked the value. Most likely left in the tank during manufacturing. I'm wondering if I have the same problem with this gray tank valve, i.e. a piece of wood cut out from construction is blocking the valve housing and that's why its trickling out and no rushing out when I try an drain?

if that's the issue, sounds like I need to open up the valve housing or take it in for someone to do it that knows what they are doing.

Let me know if anyone else has other suggestions or has come across this problem.
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Old 07-25-2015, 11:38 AM   #6
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Choudhury, you could first try a plumbers snake,...a flexible wire used to unclog sewer clogs,....open the drain valve, run the snake up the pipe, all the way into the tank,.....if there is an obstruction, you will know it, it will either stop the snake or the snake will push thru it and you will see a difference in the water draining,......at least after doing that you'll have a better idea of what you are facing,.....the link below is from Amazon.com

http://www.amazon.com/s/ref=nb_sb_no...plumbers+snake
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Old 07-25-2015, 12:07 PM   #7
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Quote:
Originally Posted by Evereddie View Post
Have heard that when they cut the hole in the tank that sometimes they let that hole material fall into the tank. It then can block drainage. If your problem is not your valve try a back flush using a flush king or equivalent to move the blockage. Maybe you can push some kind of flexible cable up the drain while open. Just get ready for a flood of water if you un clog it.
You know as well as me that is exactly what FR will do, they cut the whole with a whole saw. And if the piece isn't in the bit you know where it is at....
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Old 07-25-2015, 02:56 PM   #8
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Quote:
Originally Posted by Evereddie View Post
Have heard that when they cut the hole in the tank that sometimes they let that hole material fall into the tank. It then can block drainage. If your problem is not your valve try a back flush using a flush king or equivalent to move the blockage. Maybe you can push some kind of flexible cable up the drain while open. Just get ready for a flood of water if you un clog it.
This happened to me in my 28RKX Wildcat MAXX. The "drilled out" piece got left in the tank and got wedged in the valve and prohibited the valve from closing fully. Pretty shoddy practice if you ask me. What is Forest River manufacturing thinking when the allow a large piece of foreign material to stay in the gray or black tank knowing full well, there's a fairly high percentage chance that it's going to cause the owner a issue with his tanks!
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Old 07-25-2015, 04:23 PM   #9
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If indeed the "drilled out" piece is left in the tank how is it best removed?
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Old 07-25-2015, 04:46 PM   #10
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If indeed the "drilled out" piece is left in the tank how is it best removed?
I hate to say this. BUT, if you are not under the warranty, then while it's blocked you could cut the pipe where it drains at the tank, cut enough pipe to glue a coupling on when done, so you can rejoin the pipe when finished.
See if you can pull the piece out.
Good luck.
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