Holding tank back-up?

[Andy M.]

After my 380 sits at the dock for a week or so, I get some, (very little) backup from my holding tank , into my toilet. This doesn't happen all the time........ I would say more like 1/2 the time. Could my holding tank vent be pluged up? Would appreciate any suggestions?ThanksAndy M.WWW.CALM C380 #380San Pedro, Ca.

 

[Tim]

Joker Valve

I would guess it's some buildup on your joker valve allowing a little bit of seepage back into the toilet bowl.The joker valve is a rubber part that acts as sort of a check valve, that is supposed to allow one way movement of fluid (waste) out of the bowl. If a little bit of buildup occurs, it can perform most of its function, but will allow some seepage back.Reasonably easily replaced, maybe a little messy, but pumping your tank and then running a bunch of fresh water through the bowl into the tank should leave you with only a clean water mess when you disassemble the valve.Rebuild kits can be purchased for most all head models. They always include the joker valve.Good Luck!Tim BroganApril IV C350 #68Seattle