Mountaineer 345dbq Gray Tank(s)

[Mikeandamy]

Good Morning! I apologize if this question has already been answered regarding our particular model/year.

We just bought a 2009 Montana Mountaineer 345dbq. Our model has the main bathroom up front and a second half bath near the kitchen/rear. The manual does not indicate how many black and gray tanks we have. But the level tester indicates that there's 2 black tanks and 2 gray tanks. The level tester for "Bath 2" (or the rear bathroom) indicates that the gray tank is full. However, we can not find a valve to open the 2nd gray tank.

Our camper has a black and gray valve on the driver's side near the front of the camper. It also has a black valve on the driver's side, in the frame, right behind the tires. We have searched everywhere and find no 2nd gray valve. We've opened all valves and can't tell where the kitchen sink and back bathroom sink drain when water is being run.

Any help would be appreciated! Pictures attached.

Thank you!

[Carl n Susan]

Look along the frame near the front left wheel. There should be a hole through the frame even if the rod is gone. Typically the galley tank in plumbed into the front tank dump line. Look for the 1 1/2" line coming into the plumbing and you can guess where it is from that.