So I've changed the Joker valve,,,

The joker valve from the Raitan PHII is a drop-in replacement for the Jabsco tricuspid joker valve in the Twist lock, and lasts about 3x longer. Nitrile vs. neoprene.

In my experience, when a new Raritan valve does not fix it, it is more dollar efficient in the long run to replace the pump unit, since the seal and piston o-rings are also worn. I replace the pump about every other valve; that basically gives you a new head.
 
Whilst you have it apart a second time, it's worth applying a generous smear of silicone grease around the piston O-ring.

This lubricates the pump and saves having to keep putting veg oil or any other additive down on a regular basis. The silicone grease lasts for at least 2 years of normal use, usually outlasting the next rubber component to fail.

Silicone grease does not harm rubber and will not get washed away by water.
It makes the world of difference to ease of pumping on a manual Jabsco toilet.
 
wully1 said:
My Jabsco was new last year. After it sat idle all winter the bowl was back filling after flushing so I put some water in the bowl with a good dose of washing up liquid ( Ecover) and added the same again of boiling water from the kettle. Once pumped through normal service was resumed..
When onboard I pump a good slug of vegetable oil through every couple of days to keep everything lubed..
Click to expand...
I've found it only takes a small amount say 20ml or so not a good slug to coat all the rubber parts.
 
I think your solution might be the Rariton valve but not because it lasts longer. The Jabsco valve has 3 slits which close to block seepage. It doesn't matter how you position it, 1 or 2 slits are always near the bottom and will allow backflow. The Rariton valve (which fits perfectly) has a single slit , hence, you can position the slit horizontally. This means that there must be enough standing water to rise past the half way mark, there normally isn't that much water left in the pipe.
 
Vancouver Island said:
I think your solution might be the Rariton valve but not because it lasts longer. The Jabsco valve has 3 slits which close to block seepage. It doesn't matter how you position it, 1 or 2 slits are always near the bottom and will allow backflow. The Rariton valve (which fits perfectly) has a single slit , hence, you can position the slit horizontally. This means that there must be enough standing water to rise past the half way mark, there normally isn't that much water left in the pipe.
Click to expand...

Never install a joker valve horizontally. It will slowly droop under gravity and fail. This is in the instructions. However, this may be one of the problems with the tricuspid valves (some portion is always horizontal). Look in the manual. Also google "duckbill valve."

casestudy_route73-1.jpg
 
You must log in or register to reply here.

Share this page

Top