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Old 17-09-2014, 12:37   #1
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Joker valve help

What would make a joker valve fail after only a couple of weeks? We were getting backwash already and sue enough, the joker valve lips do not rest closed.


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Old 17-09-2014, 12:51   #2
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Re: Joker valve help

How old was the new one? just a guess, or maybe you just got a bad one that wasn't cured correctly or something
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Old 17-09-2014, 12:58   #3
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Re: Joker valve help

I bought it and installed it the same day.


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Old 17-09-2014, 13:22   #4
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Re: Joker valve help

If it is a Raritan, I had a similar problem and I believe it was Peggy Hall that set me straight. When installing the joker valve it is possible to overtighten the clamp which causes the valve to distort. You might try, easing off the two bolts holding the clamp in place. Not enough to leak, of course, but overtightening would be my first check.

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Old 17-09-2014, 18:29   #5
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Re: Joker valve help

This is my 12 day old joker valve (I checked my records: I installed it on 5 September) You can see light through it already!
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Old 19-09-2014, 09:01   #6
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Re: Joker valve help

I started a theme about the same thing several weeks ago about my Jabsco head. Last valve lasted three months in a marina where it was seldom used(because we were in a marina and can't pump out the tanks). It got used about 6 times(emergency uses) and it started allowing stuff back into the bowl. I've now put in a Raritan valve and it's been working fine. Comments on my post included that the run to the tank was to far or had to go to much of a vertical run that the valve wasn't made to hold back the stuff. When we bought the boat 6 years ago, it worked fine with me rarely changing out the valve. This year, I've had to do it about 4 times. I keep about 10 on board at all times. My valves didn't look anywhere near as bad as what you have. I've checked the vent--clear. The tube to the vent--clear. I put vinegar down the hose regularly and even changed over the in coming water to fresh so there is no seawater involved.
I've got a Raritan in the stern and it's been over 5 years since it was installed and not a single failure. Good luck


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Old 19-09-2014, 10:19   #7
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Re: Joker valve help

I've noticed that some brands are longer than others and the longer ones hit the back of the discharge elbow and it pushes the lips apart. The 2 lip models seem better because you can orient the lips to not contact the curve of the elbow.
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Old 19-09-2014, 10:38   #8
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Re: Joker valve help

Our Joker has been going 16 years, full time live aboard use.

Chlorine will kill the rubber, soften and expand it.

Paper can lodge in the corners and create a permanent set.

Mineral oils will soften and increase ability to permanent set.

We lube with kitchen grease (bacon fat etc) We do not use paper as it is unhygienic to "store" or dispose of, bad for the labia, and the ocean and never leaves you clean.

Our shower hose serves as a bidet.

Once in a while, we squirt some acid down there, or if we use acid for other purposes (Muriatic, Ospho, Vinagar, whatever) we dispose of it down there, with a 10 minute soak time.

We have counted the strokes to flush the pipes on our manual and the seconds on our electric (Raritan Crown 1 1978 model) and make sure that we flush it clear.
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