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Old 05-21-2013, 12:40 PM   #1
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Slow Gray Water drain?...Bedroom Lambrequin?

We have an ’05 Dolphin as you can see. I have two questions/items that maybe someone else has already figured out.


1. Is there an air vent in the gray water tank? If so where is it? I’m hoping there is and mine is stopped up as that is my last idea as to why the gray water drains so slow.


2. Anyone removed the border/lambrequin around the bed slide? I’d like to change the color but cannot find how these are attached.
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Old 05-21-2013, 12:52 PM   #2
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There should be a roof vent for the gray tank as well as one for the black tank. You might pop the cap off and run a plumbing snake down the pipe. Some times bees or mud dauber fill them up and obstruct air flow.
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Old 05-21-2013, 01:06 PM   #3
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We installed new vent covers when we did the spring caulking, I never thought to run anything down the pipes. Thanks
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Old 05-21-2013, 02:43 PM   #4
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Quote:
Originally Posted by lenjen View Post
Is there an air vent in the gray water tank? If so where is it? Im hoping there is and mine is stopped up as that is my last idea as to why the gray water drains so slow.
Len, The grey water tank has a shape that does not promote fast and or complete draining. the tank is typically only about 4 " tall and is as wide as the coach basement. The outlet is (on mine ) located near the center line of the coach. and uses only about 1 1/2 " abs pipe.

The single roof vent NRV uses may be an issue, as it goes to top of the tank along the coach center line also. The top surface of the tank may have sags between the center and the sides that prevent properly venting to those spaces at the sides until water levels drop enough. The auto vents under the sinks should be checked to improve that effect.

I am considering adding smaller diameter vents to each side one of these days.

More unlikely is a hole cut out left in the tank.

I have found complete and fastest drainage occurs with the coach level side to side and slightly higher in front.

HTH

Marty
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Old 05-21-2013, 02:52 PM   #5
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The sink drain spout may have hair and other material caught near the top of the drain making the drain smaller. The P trap may also have obstructions in it.
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Old 05-21-2013, 03:03 PM   #6
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. The auto vents under the sinks should be checked to improve that effect.

I am considering adding smaller diameter vents to each side one of these days.

More unlikely is a hole cut out left in the tank.

I have found complete and fastest drainage occurs with the coach level side to side and slightly higher in front.

HTH

Marty
I need to check for the under sink vents. Thanks for the input
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Old 05-21-2013, 05:16 PM   #7
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M&EM has it. up in front up on street side. use your jacks.
mine now drains like a maniac.
dave
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