Jabsco toilet back filling?

I

irl2605

Well-Known Member
Joined
29 Apr 2008
Messages
92
Visit site
Hi All
Wonder if anyone can shed some light on this . We have recently changed our Beneteau 260 for a new 25.7.. Identical Toilets except that the new boat has a holding tank fitted. The problem is that after flushing the new toilet, a slow seep of water back into the bowl to about half bowl level occurs,resulting in spillage during hard sailing. We have tried leaving the valve in the flush as well as the empty positions to no avail and flushing for 20 pumps after the bowel is empty.I have dismantled and checked for blockages but all looks perfect. As far as we can remember we never had this problem with the old unit.
Also has anyone tried changing the lock position on the plunger from horizontal to vertical as the horizontal position is responsible for many a bruise on sensitive parts.
Fair Winds.
Iain
 
Last edited:
Really sorry to see you have such a problem though i think going to the toilet should be a simple matter.

If i ever get a larger boat it will have two simple commodes,no piping in or out.
 
the flush/empty valve only affects the flush water.

So joker valve is not holding and if its the twist and lock type pump that is not sealing either when locked.

Replace joker valve and service the pump plunger which hopefully just needs a new O ring
 
Last edited:
Yep .. Thats what i was thinking but there seems to be a good seal on the joker and no foreign debris between the "lips" .. not sure what i should check for the twist and lock .. any suggestions welcome .. :)

So joker valve is not holding and if its the twist and lock type pump that is not sealing either when locked.[/QUOTE]
 
We had this problem for ages and eventually sorted it almost by accident.

I thought initially it was inlet water, but we worked out it was outlet water. Checked the joker valve, but it looked fine. Problem persisted. I eventually just changed the valve and that fixed it. Just because the valve looks good, doesnt mean it is perfect.

I would change the valve, if that doesn't work change the whole pump. They aren't expensive and you can clean up the old one for spares.
 
I had the same problem with back filling, but on both heads so a bit confusing, decided to buy a service kit, but the nice man at force 4 persuaded me to replace both pump assemblies with new "twist and lock" types, if I factor in my time to service the old ones and the cost of service kit, plus its a pretty unpleasant task anyway, I think I did the right thing, replacement took 20 mins each unit.
 
Good Spot JP .. Now that would be a problem :) Iain
Its a new Boat and only on the water a few months in total.So I'm assuming the factory fitted plumbing is correct Johnalison. It has the twist lock Dhobyb . Starting to think a call to the suppliers might be in order .. :(
 
Jabsco Heads Back-filling

Almost certainly Joker valve at fault. I have cleaned and greased these and there is some improvement but only real solution is to replace it. Even if they look perfect, if waste is leaking back in then replace it. Pretty easy job ... only four screws to remove (IIRC) ... but you will get a couple of cupfulls of smelly water from the outlet pipe!!!

Alan.
 
ok everybody Joker valve it is .. Will change next week and let you know the outcome . Thank you all for the input.
Happy Sailing
Iain
 
irl2605 said:
Good Spot JP .. Now that would be a problem :) Iain
Its a new Boat and only on the water a few months in total.So I'm assuming the factory fitted plumbing is correct Johnalison. It has the twist lock Dhobyb . Starting to think a call to the suppliers might be in order .. :(
Click to expand...

Scroll down THIS PAGE to see a diagram and lists of all its bits and pieces.
Click on the diagram to enlarge.

If it is water coming back from the outelt pipe it is getting back past the joker valve and the twist-and-lock thingy. Even if the Joker valve does not seal 100% the T&L thing should stop any back flow


On THIS PAGE you will find the installation instructions should you wish to confirm that the installation is correct ( Old so does not show the twist-and-lock pump)
 
Thats great VicS thanks for the diagrams. Will be donning the rubber gloves during the week so all info helps.
:)
Iain
 
Seriously, just change the whole pump unit. As others have said, its an easy job and gives all new service parts. Chances are that if your joker is done, then other wee bits will be close behind (so to speak). A new pump will set you good for a couple of seasons trouble free flushing!
 
Thanks ripster But this is a new boat .. and I think the loo has been used less than 10 times .. Its not something i count .. :)
 
All you need to do to check is to leave the loo with one or other seacock closed and see which one leads to it filling.
 
irl2605 said:
Thanks ripster But this is a new boat .. and I think the loo has been used less than 10 times .. Its not something i count .. :)
Click to expand...

Sounds like you should tell the boat builder to send an engineer out and sort it then. Warranty!!!!

It's quite possible that something from the installation process is causing an issue with the joker valve. If there is a long run from the outlet to the seacock the weight of water can push it back.
 
I'm inclined to think that the feed pipe to the holding tank is higher than the non HT version used to be, so puts more pressure on the valves to stop back fill.
It happens when both sea cocks are closed.
And the boat is in southern Ireland and the suppliers Foxes Yacht Sales( who have been great) are in the east of England. Would rather just fix it if its not to complicated.
Thanks again Guys
 
You must log in or register to reply here.

Share this page

Top