[cknuth]

Howdy, I'm once again firing up an old thread as the discussion seems relevant.    I typically run my waste as others do: grey water bypass and occasional dumping of the black water.  So the front valve is open and the rear valve closed.    My rear "bypass" valve is air operated with a manually accessible handle.  It has gotten so sticky that the air won't open it and manual force is needed.  I'm pretty sure it's not low air pressure as it closes easily with the air control.    Lithium grease on the exposed shaft has had no effect.    Is there some way to open up this valve for rebuild/lubrication?  Seems very much glued in and inaccessible.