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Old 29-12-2014, 10:25   #1
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New Joker Valve Leaking Or Something Else

I just replaced the joker valve with a new one. After a few days of perfect head conditions, water started to back flow into the toilet, like it did previously. The old joker valve was really worn. I never use toilet paper in the head (not currently living on boat), and cannot figure out why after working well for a few days that there is back flowing again. Any suggestions or ideas?
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Old 29-12-2014, 19:27   #2
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Re: New Joker Valve Leaking Or Something Else

I can think of at least one: a blockage somewhere downstream of the toilet--most likely your holding tank vent--is creating back pressure that's pushing whatever you're leaving---but shouldn't be--in the head discharge line back toward the toilet.
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Old 30-12-2014, 07:16   #3
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Re: New Joker Valve Leaking Or Something Else

Make sure it is backflow from the outlet. If your vented loop is clogged, you may be getting flow past the valves from the inlet. Shut off your thruhull, pump dry and see if it still fills with water.

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Old 11-02-2015, 15:41   #4
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Re: New Joker Valve Leaking Or Something Else

And it was the Joker valve. Calcification deposits inhibited It from properly fitting between the two fittings. So I got leakage that dripped in the head and I also had backflow into the toilet bowl itself. Once I scraped out the calcifications the joke about fit properly and closed tightly. What through me off was that the old joker Val apparently did not fit properly but it did not leak into the head. Once it's Valve flaps worn out water started to back flow into the toilet bowl. However it was time for me to change out the vent valve I was just too lazy to do it. It had condensation on the outside and stank like a wolfs behind.


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Old 11-02-2015, 17:22   #5
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Re: New Joker Valve Leaking Or Something Else

You don't mention what head you are using. On my Raritan head, if the coupling where the joker valve is installed is over tightend, the joker valve gets distorted and leaks. If you have a Raritan PHII try loosening the clamping nuts and then gently retighten them. It really doesn't take a lot of torque to make a good seal. In this case less it best..

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Old 13-02-2015, 11:39   #6
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Re: New Joker Valve Leaking Or Something Else

I don't know the brand. I just took the old valve to west marine and got a new one that matched.


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Old 16-02-2015, 08:36   #7
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Re: New Joker Valve Leaking Or Something Else

Many of the older production boats used Jabsco brand heads and they haven't changed much over the years. You might check their web site and see if you can find a photo of your head.
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