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Old 04-05-2016, 04:08 PM   #41
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At the risk of sounding stupid...what and where is the Joker Valve?
I'm extremely curious after reading this thread, and maybe it'll help another newbie out as well.

This is our head:
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Old 04-05-2016, 04:11 PM   #42
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It will be right under your pump there on the right. You will see it when you take those lower bolts/screws off.

However, given that sign I am not sure you need to concern yourself!
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Old 04-05-2016, 04:15 PM   #43
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However, given that sign I am not sure you need to concern yourself!
We put that on when we have guests on board.
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Old 04-05-2016, 04:46 PM   #44
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Greetings,
Ms. HM. Well, isn't that what the joker valve does in a properly functioning system? Block the door to the bowl? If not, what is it supposed to do then? Vent is free and clear.
In a manual toilet, blocking backflow is the LEAST important joker valve function...In an electric toilet, its real function is only to block a catastrophic eruption in the bowl due to back pressure. A new one will only block slow seepage until enough flushes have passed through it that the "lips" can no longer close tightly. So while replacing the joker is keeping backflow out of the bowl, at least for a while, it hasn't eliminated the backflow..it can't.

That may be due only to a head discharge hose that runs even slightly uphill...not a big deal as long you don't leave anything but clean flush water in the hose TO run back downhill. Or, there could be mineral buildup that's reduced the inner diameter of the toilet hose enough to restrict flow...flushes aren't making it to the tank in amount of time you're leaving your finger on the flush button, so because water runs downhill, that's what it's doing.

So you really should figure out why there's any backflow to block and determine whether it's something that needs to be corrected or just something you need to live with and just just replace the joker valve a lot more often.

Or, if it's just clean water running back downhill, you could consider doing what people who think the bowl on the boat needs to hold water "like the one at home" (mostly houseboat owners on inland lakes): they purposely create an uphill run from the toilet long enough to provide half a bowl of water and remove the joker valve altogether. Since the joker valve in basic electric toilets doesn't have any impact on the toilet's performance, there's nothing wrong with that.
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Old 04-05-2016, 08:05 PM   #45
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Why is it called a joker valve?
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Old 04-05-2016, 08:45 PM   #46
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The red two-lip ones are often called duck bill for obvious reasons. I think the Joker name comes from the three pointed ones resembling a jesters hat.

Then there is always this!

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Old 04-05-2016, 09:42 PM   #47
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Why is it called a joker valve?
You'd be wrong Menzes...Joker valves were called that long before the X shape pattern existed. But in 25 years I've never been able to find anyone who knows where that name originated. The most logical guess is that "joker" is a corruption of "choker"... but like all the other "educated" guesses, it's JUST a guess.

And btw...would y'all please learn how to reduce photos to something smaller than a queen size sheet?
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Old 04-05-2016, 10:28 PM   #48
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NOT the way to do it! We need to talk...I'll be glad to help you do it the right way.
I know its not the right way but I can t reach it from the inside...if I was 22 instead of 62 maybe...It wont clear from the outside (altho I just drained some digester back thru it to the outside recently but have yet to replace my macerator to try it)
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Old 04-05-2016, 10:34 PM   #49
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I know its not the right way but I can t reach it from the inside...if I was 22 instead of 62 maybe...It wont clear from the outside (altho I just drained some digester back thru it to the outside recently but have yet to replace my macerator to try it)
Hey, you're doing it WRONG! You have been told. Don't let it happen again.

I am wrong, my photo size is wrong, I need to learn.

Everyone is wrong.

Buy her book already for cripes sake.
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Old 04-05-2016, 11:14 PM   #50
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I know its not the right way but I can t reach it from the inside...if I was 22 instead of 62 maybe...It wont clear from the outside (altho I just drained some digester back thru it to the outside recently but have yet to replace my macerator to try it)
Surely you can reach the thru-hull from the outside...have you tried attacking it with screwdriver blade or an ice pick/awl? 'Cuz I don't THINK a "digester" is gonna dissolve a mud dauber's nest.

Thanks for the book plug, Menz!
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Old 04-06-2016, 06:32 AM   #51
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Thanks for the book plug, Menz!
Any time bud.
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Old 04-06-2016, 08:23 AM   #52
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You'd be wrong Menzes...Joker valves were called that long before the X shape pattern existed. But in 25 years I've never been able to find anyone who knows where that name originated. The most logical guess is that "joker" is a corruption of "choker"... but like all the other "educated" guesses, it's JUST a guess.

And btw...would y'all please learn how to reduce photos to something smaller than a queen size sheet?
I've never heard them called a joker valve. Always a duck bill or choker valve.
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Old 04-06-2016, 10:06 AM   #53
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You obviously haven't read the manuals and parts lists for very many toilets, Bill...but if remember correctly, all the toilets on your boat are VacuFlush with "duckbill" valves, so you wouldn't have much need to.
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Old 04-06-2016, 05:05 PM   #54
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You obviously haven't read the manuals and parts lists for very many toilets, Bill...but if remember correctly, all the toilets on your boat are VacuFlush with "duckbill" valves, so you wouldn't have much need to.
Really!? Shows how bad my memory is.

They spell it joker?
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Old 04-06-2016, 05:52 PM   #55
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Yup...every mfr does. See page 8 Part # 253 in the Raritan PHII owners manual.
PH II Owner’s Manual

Part #11 on page 3 in the Jabsco 37010 electric toilet "manual"
http://www.xylemflowcontrol.com/file...43000-0612.pdf

Those are just two examples...Any of y'all who want to can look up more toilets.
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Old 04-06-2016, 05:59 PM   #56
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Yup...every mfr does. See page 8 Part # 253 in the Raritan PHII owners manual.
PH II Owner’s Manual

Part #11 on page 3 in the Jabsco 37010 electric toilet "manual"
http://www.xylemflowcontrol.com/file...43000-0612.pdf

Those are just two examples...Any of y'all who want to can look up more toilets.
Dang if you ain't right as usual. I guess in my sun burnt mind I read "joker" and thought "choker" all these years.
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Old 04-06-2016, 06:10 PM   #57
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Dang if you ain't right as usual. I guess in my sun burnt mind I read "joker" and thought "choker" all these years.
Choker was probably in the manual as well. As in:

If you don't properly maintain your head, it will become a choker.

If you don't properly maintain your head, you will become a choker when you eventually have to.
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