Does 3 Holding Tank Valves = 3 Holding Tanks?

[YSBfireguy]

Hi Folks,

I just purchased a 2003 31BK Colorado By Dutchmen. It the previous owner did not have any of the manuals for the unit. I am trying to familiarize myself with the holding tanks. I noticed 3 valves. 2 are plumbed together in front of the tires and an additional, what appears to be a Grey water line and valve behind the tires towards the rear of the unit. Dow this mean there are 3 tanks in this unit?

Sorry for the stupid question.

[Mole]

The only stupid question is the one that you don't ask.

The manuals are usually very generic and are designed to be used in nearly any design produced for that year, possibly for a few years. It isn't likely that the manual would help you in this case. The bigger question is which valve(s) is/are for your black tank(s) and which is/are for your gray tank(s). Recently, manufacturers have been using smaller diameter valves for the gray tanks as there are less solids in those tanks versus the black tank, even though all tanks exit through the same discharge pipe that you hook your hose to. Your trailer should have a master monitoring panel; generally they are marked for four systems: battery, potable water, black water and gray water. If you have two buttons for gray or black, the answer is right there. Our trailer has two gray tanks and two buttons for them but because they are plumbed together, the tank levels are usually identical on the panel display.

Sorry that I couldn't be a bit more helpful. Cheers!

[wahoonc]

From your description I would say it is likely you have 3 tanks, my guess would be one gray tank for the kitchen, one gray tank for the bath, and a black tank for the toilet. The brochure doesn't call out 3 tanks, but that doesn't mean anything. Typically gray tanks have a smaller pipe leading to the valves, with the black tank having a larger pipe.

Got pictures?


Here is a link to the 2003 Colorado Brochure

Aaron

[calewjohnson]

What indicator lights do you have on the indicator panel? You may see a Grey 1, Grey 2, Black...or some word combination indicating that...

Cale

[YSBfireguy]

Thanks to all for the replies. The stand alone tank at the rear is the tank for the kitchen sink and the shower tank is plumbed to the Toilet outlet.

Never had a trailer this big before so not used to seeing the extra tank.