It's another loo one!

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Deviation

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He who normally maintains the boat is away and our aft heads have bailed (or not in this case) on me. I have taken the Joker valve out which was inverted and more open than closed and replaced it with a new one. As I don't normally do these things I put the new one in the same way the old one came out. Doh! Obviously it didn't work so I have taken the new one back out, reinverted it and put it in the correct way. There was a small (less than a mm) gap between the valves after I reinverted it. It's now draining but it's leaking out from the elbow. I've put a jubilee clip around the base of the hose but still leaking as it's obviously coming out from higher up. Any suggestions as I'm rapidly losing the will to live!! Thanks, Samantha
 
I’m not sure that I quite follow the geometry of the leak but I would expect the flaps of a joker valve to be fully closed when at rest, so to speak. It also needs to settle neatly into its place so that it isn’t twisted when the joint is tightened forcing it to leak. I would expect the hose pushed onto presumably a plastic nozzle to be virtually leak free even without a jubilee clip, so maybe it is too old and stiff and needs replacing. Generally a loo should behave itself if properly assembled with reasonable new bits.
 
Normally there is nowhere that a leak can occur above the elbow as it is conventionally a loop of hose. But if you have a siphon break at the top of the loop there would be hose clips there which might have been disturbed. However it is very common to twist the elbow inside the hose which will allow leakage.

Assuming a Jabsco, be very careful when replacing the elbow as the self tapping screws go into their own thread in the plastic. If you are too rough with it or do not get the screws back in their threads you can strip them.
 
Whenever I touch a Jabsco (or other) heads installation I just put a new outlet pipe on as well as a service kit or a complete new pump. You will possibly be surprised just how much crud is half-blocking the outlet pipe making it very stiff.
 
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I'm a bit unclear about quite where the leak is.

If it is a result of an aged stiff hose failing to re-conform to fully seal the join to a hose barb, then replacing the pipe, as mentioned above, is the ideal. You can, however, often rescue the situation without replacement by warming the end of the old hose to soften it.

A blast - inside and out if possible - with a hairdryer, hot air gun or (if the hose is not attached at the other end) the steam from a kettle, before quickly replacing it on the barb will quite possibly do the trick. One might even get away with dunking the end of the hose in a pan or bucket of very hot water for a minute or so before quickly fitting it.
 
Thank you all for the replies. I did get it sorted eventually and transpired it was something as silly as me not tightening up the jubilee clip at the base. It wasn't leaking from the elbow after all, despite multiple dry paper towels suggesting it was. Grateful for the help. And rather chuffed I fixed it!
 
Deviation said:
Thank you all for the replies. I did get it sorted eventually and transpired it was something as silly as me not tightening up the jubilee clip at the base. It wasn't leaking from the elbow after all, despite multiple dry paper towels suggesting it was. Grateful for the help. And rather chuffed I fixed it!
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Now your be lumbered with the job next time?
 
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