[Carl n Susan]

The "third" tank has tripped up many members. Yes you have a third tank for the the galley. No it is not controlled by the valves in the pass through compartment. It has a separate pull handle on the driver's side somewhere along the frame area. It may come through the frame or it may come out through the coroplast.


Most likely the handle and the pull rod have come off and you get to find where they should be. One sure way, albeit not the easiest, is to lower the coroplast at the point of the existing sewer line exit. You should see an 1.5" (2"??) pipe coming from the rear and plumbed into the sewer exit pipe. Follow that pipe rearwards, lowering the corolast as necessary, until you find the dump valve. That is where the pull rod and handle should connect.