Jabsco Twist / Lock Head

[Scott730]

I buy joker valves for my Jabsco head from Defender.com, last one was $9.99. I've learned to replace the bottom valve gasket($17) at the same time as the joker valve then the time between the next replacement is about twice as long.

[thinwater]

Originally Posted by enovillo

thinwater, where do you get the joker valve for $15? All I've been able to find is the whole service kit, which goes for ~$70. Is the joker valve a "standard" size?

Yes, the Raritan valve fits too. It's a really easy job. Not dirty, if the head is well-flushed, so replace it when it is not plugged!

If you flush the waste all the way to the tank, meaning flush enough strokes, then all that can back-flow is clean water of the amount in the hose. It should not be messy or overflow the bowl. If it is messy, someone is not flushing enough.