Black and gray combo drain?

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Thom Alan

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Jun 8, 2021
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I just got a 2001 Northland Grizzly 880 camper and I find it strange that there is only one valve to drain the both tanks? Is this unusual?
 

Alfa38User

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Oct 4, 2007
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6,676
What do you mean by "one Drain"? Most RV's have one common output, typically a larger pipe, but each tank has a separate valve to feed each output to the common one.

I would not feel comfortable in the situation where the black tank could feed backwards into the other tank(s).
 

Lou Schneider

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Mar 14, 2005
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Not to mention you lose the ability to flush out the hose with grey water after dumping the black tank.
 

Thom Alan

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Jun 8, 2021
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There is one drain pipe and one gray colored lever to open the tank. I can find no black lever. On the inside of the camper I have two gages showing the different tank levels so they are separate tanks. The owners manual is no help and it seems Northland is no longer in business.
 

Thom Alan

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Jun 8, 2021
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Oops, never mind. I found it. It was accessible from above inside another door, but the previous owner covered the access hole with plywood. Problem solved.
 
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