Black and gray combo drain?

[Thom Alan]

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]

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]

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

 

[Thom Alan]

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]

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.