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Old 10-07-2009, 03:11 PM   #1
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Grey Holding Tank

Can any one please send me or post instructions on how to remove the grey waste water holding tank. I think I have a crack in it and would like to remove to inspect.

On my last trip I kept checking the read out for the grey tank and it never seemed to fill up so I just left it along. Then as I was doing my walk around before we left I noticed water leaking out from every crack under the rig. The water was clear and based on the tank never completely filling up my conclusion is that I must have a crack in the tank or a loose connection.

So if any one can help out I thank you in advance.

Happy trails.

Noel, Jen, Jacob, Jackson and Louie (Golden Retriever)
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Old 10-08-2009, 02:43 AM   #2
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This is going to be a pretty serious task. Even a seasoned technician hates to have to pull tanks from a motorhome. The tanks is located behind the 1 1/2" drain valve piping. You may find that it can be pull out the other side when you get you drain line(s) disconnected from the top and the drain output puled off the bottom. Don't forget about the level gage connections too. Good luck and keep us posted.

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Old 10-08-2009, 10:32 AM   #3
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Are you sure it's the greay tank? If it's the gray tank or plumbing to it, then you should get some stinky odors with the leak. You just want to be sure you're chasing the right problem and it's not a fresh water problem.
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Old 10-08-2009, 11:16 AM   #4
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Rarely is the gray water clear - usually milky and smelly too, if you do any cooking in the rig. I would not leap to the conclusion the gray is leaking if the residue looks clear.
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Old 10-08-2009, 01:20 PM   #5
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How do you know the gray tank never filled up? If you're basing your conclusion on the fact the sensor said the tank wasn't full, tank sensors are notoriously unreliable. The tank may have been filled even though the sensors said it wasn't. The tank could be overflowing.
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Old 10-14-2009, 09:47 PM   #6
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Since the dripping water is clear, it sounds like you have a leak in your drainage system, not the tank. As noted by Gary, gray water is kind-of gray. Clear water suggests that its leaking from one of the fittings (before the tank). This would explain why some water is getting into the tank. Try putting some food coloring into one of the drains. Then run the water. If the dripping water comes out the same color, you'll know that drain system has the leak. If not, add the coloring to the next sink. This way, you'll be able to narrow down the section of drain that is leaking.

As for removing the waste tank, forget about it. They are typically installed in the early stages of the assembly process. As a result, they're next to impossible to remove. Get a plumbing diagram and call the company. They should be able to tell you the best way to access the drainage systems. Best of luck.


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