If no overboard discharge, If black water it’s the joker valve, if sea water the flapper. Mine does both under the right conditions. I close the raw water intake when under way, and change the joker valve every season, PLUS keeping the holding tank pumped out.
Dave Sent from my iPhone > On Aug 30, 2022, at 12:36 PM, StrightR--- via CnC-List > <cnc-list@cnc-list.com> wrote: > > > Has anyone experienced water back flowing through the head despite dry bowl > left in the closed position? Raritan head. Assume it could be a defective > Joker valve or flapper valve. Anyone had a similar problem and if so what > was the cure. > > Thanks > Rod
