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Open Roads Forum  >  Tech Issues

 > Black Tank Dump Valve

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Lynnmor

Red Lion

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Posted: 06/03/21 11:06am Link  |  Quote  |  Print  |  Notify Moderator

CarnationSailor wrote:



If I recall correctly, the roof top vent cap is attached to the vent pipe with screws. So it seems unlikely that the pipe slipped down; however, if it did, then the vent cap should be missing. At any rate, I'll check out this possibility.


For some information Google: rv vent pipe slipping





Durb

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Posted: 06/03/21 09:33pm Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:

CarnationSailor wrote:



If I recall correctly, the roof top vent cap is attached to the vent pipe with screws. So it seems unlikely that the pipe slipped down; however, if it did, then the vent cap should be missing. At any rate, I'll check out this possibility.


For some information Google: rv vent pipe slipping


As a test, turn off the black tank rinse then flush the toilet which will relieve any tank pressure. Then, try the valve.

RLS7201

Beautyful Downtown Gladstone, MO

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Posted: 06/05/21 02:01pm Link  |  Quote  |  Print  |  Notify Moderator

IAMICHABOD wrote:

I found that lubricating it during a dump as in this video works.

I have used this method for many years to lubricate my valves and have had no problems with them at all.

This Video will show how to do it


I did the same only different. I drilled, tapped and screwed in grease zerks. Then lubed with chassis grease. NO! the seals are NOT rubber.

Richard


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CarnationSailor

Carnation,WA

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Posted: 06/09/21 10:15am Link  |  Quote  |  Print  |  Notify Moderator

Update: The difficult operation is not related to flushing the tank or pressure building up in the tank. I dumped the black tank and as usual the valve was easy to open. While dumping and for a total of 10 minutes, I ran water in thru the flush port. Then I closed the valve and tried to re-open it. It was very hard to operate.

I think I am going to try the valve lubricant that you put in the tank one more time, and then, if that doesn't work, probably have the valve replaced.


2015 Crossroads Rushmore Springfield
2015 Chevy Silverado 2500HD Duramax


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