Looks like the base valve gasket
and joker valves both needed replacing! SuperLube seems to be the all-purpose lubricant I've been looking for as it does the job for the toilet as well as a dielectric grease for the newly replaced shorepower plug
on my boat. Fortunately I've found the major service
kit for under $60 and was able to put it all together in a few hours (including research
and run time for parts!). It's nice to have a head
that doesn't fill-up from the holding tank!