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10-05-2012, 14:21
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#1
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Registered User
Join Date: May 2011
Posts: 98
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jabsco joker valve an annual replacement?
Back flow yet again. Changed flapper and joker less than a year ago....normal time to fail? am I missing something?
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10-05-2012, 14:38
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#2
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Registered User
Join Date: Dec 2009
Posts: 110
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Re: jabsco joker valve an annual replacement?
nope that the same here and becoming an expert quickly LOL
Did it yesterday
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10-05-2012, 15:08
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#3
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Moderator
Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 21,155
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Re: jabsco joker valve an annual replacement?
Yep, the jokers at least seem to fail pretty rapidly, and they tend to be pretty dear from Jabsco . So, yesterday I replaced mine with one from the knock-off TNC head folks... way less expensive and essentially identical to the eye. Works fine now, and I'll be interested to see if it lasts at least as long as the OEM parts. If I get premature (or really, MORE premature) failure, I will report here on CF.
Cheers,
Jim
__________________
Jim and Ann s/v Insatiable II, lying Port Cygnet Tasmania once again.
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10-05-2012, 15:11
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#4
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Registered User
Join Date: Sep 2007
Location: FL
Boat: Pacific Seacraft 31 - Cielo Azul
Posts: 360
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Re: jabsco joker valve an annual replacement?
I live aboard, and change it every couple of months.
who is "knock-off TNC head folks"?
Tom
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10-05-2012, 15:18
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#5
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Registered User
Join Date: May 2011
Posts: 98
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Yep, about $15 from WM...flapper failing at same rate, or do jokers go first, with the joke on us? Pun intended.
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10-05-2012, 15:43
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#6
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Registered User
Join Date: Sep 2011
Location: Med.. currently Greece
Boat: Oyster 45
Posts: 364
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Re: jabsco joker valve an annual replacement?
I did both or heads yesterday as well. Main problem was the Joker valve with a big build up of calcium. (using hydrochloric acid does help a lot to get rid of some of it)
Both less than a year old.
Why are they called "Joker Valves?
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10-05-2012, 17:16
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#7
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Registered User
Join Date: May 2011
Posts: 98
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I believe it really is a "choker valve" but Joker became the oft used name...maybe because the joke's on us...should last longer than a few months...but, rather replace the joker and flapper than have back flow, and don't feel like a major refit to replace the head with something more substantial.
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10-05-2012, 17:49
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#8
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Moderator
Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 21,155
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Re: jabsco joker valve an annual replacement?
Quote:
Originally Posted by teejayevans
I live aboard, and change it every couple of months.
who is "knock-off TNC head folks"?
Tom
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Sorry 'bout that: should have been TMC
tmcin.com/about-us.aspx
They seem to copy many of Jabsco's products and sell them here in Oz for about half Jabsco prices, more or less.
And my first product review comment is that after a day's usage it started leaking at the flange. A quick recheck showed that the thickness of the rubber flange on the joker was a bit thinner than the Jabsco one. Not being near a chandlery right now, I have glued a shim of 2 mm rubber on the flange, and the leak has stopped... for now.
Being a cheapskate has its drawbacks!
Cheers,
Jim
__________________
Jim and Ann s/v Insatiable II, lying Port Cygnet Tasmania once again.
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10-05-2012, 18:14
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#9
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Registered User
Join Date: May 2004
Location: Cruising on the hook
Boat: 34’ Marine Trader
Posts: 752
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Re: jabsco joker valve an annual replacement?
Six years ago, I unbolted both my Jabsco heads from the deck and put them where they belonged............the dumpster. I replaced them with Raritan units and have the original joker valves in them. We live aboard for 8 months of the year.
__________________
Jim
We are what we repeatedly do.
Excellence, therefore, is not an act but a habit."
--Aristotle
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10-05-2012, 18:29
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#10
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Registered User
Join Date: May 2011
Posts: 98
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Jentine says it best!
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10-05-2012, 18:31
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#11
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Moderator Emeritus
Join Date: Nov 2008
Location: Lived aboard & cruised for 45 years,- now on a chair in my walk-in closet.
Boat: Morgan OI 413 1973 - Aythya
Posts: 8,455
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Re: jabsco joker valve an annual replacement?
I believe, though I haven't collected numerical data, that there is a relationship between the salinity of the water and the rate of crusty deposition on the joker valve. Mine last longer when I am further upstream within an estuary. I also believe that a dollop of vinegar (acetic acid) in the bowl slows this deposition. This is a much milder acid than the HCl mentioned above, but it still breaks down the scale.
__________________
Take care and joy, Aythya crew
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10-05-2012, 18:57
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#12
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Sponsoring Vendor
Join Date: Dec 2010
Location: The Spice Islands
Boat: 50ft yacht
Posts: 24
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Re: jabsco joker valve an annual replacement?
Can't resist a reply . Lived aboard 5 years never replaced anything on either Jabsco head. Pour cooking oil in once a week and every so often half a litre of cheap vinager. Also have a sign " if you didn't eat it don't put it here"
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10-05-2012, 19:02
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#13
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Marine Service Provider
Join Date: Oct 2007
Boat: Endeavour 42CC
Posts: 1,182
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Our jabsco electric is going on 3 years since new joker. Starting to see occasional seepage, but I think it is from crusty TP, I can clear it and stop the seepage.
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10-05-2012, 19:14
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#14
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Marine Service Provider
Join Date: Nov 2008
Location: Blue Mountains, Australia
Boat: now skippering Syd Harbour charters
Posts: 1,557
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Re: jabsco joker valve an annual replacement?
Quote:
Originally Posted by malukusailor
never replaced anything on either Jabsco head. Pour cooking oil in once a week and every so often half a litre of cheap vinager.
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Interesting...thanks malukusailor.
We haven't any problems yet, apart from our 'guest heads' being blocked by gravity back-flow (essentially not continuing the flush action long enough to pump the matter all the way into the tanks) against the joker valves. In the process of cleaning the blockages we observed the joker valves to be still flexible, albeit filled from behind with the blockage of course.
We also saw it suggested elsewhere to fill the heads with fresh water if they're not going to be used for a while, which we now do.
We might now add the cooking oil and vinegar as further preventative maintenance...
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10-05-2012, 23:02
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#15
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Moderator Emeritus
Join Date: May 2007
Location: Ohio
Boat: Now boatless :-(
Posts: 11,580
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Anyone have an exploded view of the small pot manual Jabsco? Grey handle 2007 model?
Googled a bit and can't come up with one yet.
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