Jubilee clips

ghostlymoron said:
Why are you advised to use 2 [Jubilee] clips on water hoses?
Click to expand...

To be pedantic, you're not. However, two hose clips are recommended -- for hoses below the water line. For obvious reasons a similar belt-and-braces approach is often advocated for holding tank hoses. At least one very well-informed forumite has questioned whether this is really necessary if good quality clips are used.
(Wouldn't like to give the impression that lots of other hose clips aren't at least the equal of 'Jubilee' brand.)
 
ghostlymoron said:
Why are you advised to use 2 clips on water hoses?
Click to expand...

Not all water hoses, only those below the waterline and open to the sea. And the idea is to make doubly sure that the hose doesn't come off and allow the boat to flood.

There's a fairly large element of superstition to it, though. I've handled an awful lot of jubilee clips in five years of refitting our boats, and I've never known one spontaneously fail. In any case, a correctly sized hose that's been on its fitting for any length of time is very reluctant to budge even with the hose clips completely removed, often needing to be cut free.

Our stern gland on Kindred Spirit (Ariam has a sail drive) only had room for a single clip to hold the short length of hose between gland and stern tube, this was considered normal and nobody batted an eye, even though it seems like it might come under a lot more load and there's no valve to close if it fails. But it's not part of the "double-clip all hoses" religion so that's ok.

I still double-clip them anyway :D

Pete
 
ghostlymoron said:
Why are you advised to use 2 clips on water hoses?
Click to expand...

So that if ( you dont use stainless clips and ) this happens you can be sure there's another in the same condition.


DSCF1020.jpg


Don't all run in circles screaming and shouting about not using stainless clips.... it wasn't on a thru hull
 
Last edited:
The surveyor of my new old boat mentioned it as something that had to be done before launching*, and the insurance co picked up on it, and insisted on double stainless hose clips below the waterline... as a condition of cover!

S/S Hi-Grips etc are top quality and won't just 'fail', it's superstition.

Also, sometimes, on fittings designed for one hose clip, you can't fit two clips on in the correct position, so they are jammed together touching each other, one on the lip on the end of the fitting, which arguably *increases* the chance of failure.
It's lunacy really.

( *Mind you, he also insisted on a 'Gas Safe Certificate', there is no such thing for a private cruising yacht. He was able to recommend his mate for the job, £100 call-out... The insurance co then insisted on it as well, and a query showed they didn't know what they were talking about despite being a reputable company specialising in yachts.
Luckily I changed to paraffin.)
 
Last edited:
I thought it was also part of ISAF rules?

But as said a hose that has not been touched for a long time is inordinately difficult to remove even once the jubilee clip is removed.

I notice on my Volvo water pump that the inlet on the water pump has no barbs and from memory the gate valve on the top of the sail drive has no barbs either so the hose in between is held on with 2 hose clamps (each end) - but it would have been more secure if the 'spigots?', had been barbed. If there was any sense in it all - they would or should have been barbed, it should have been part of any regulations etc.

The ones of which I would be most concerned (that they have 2 clamps) would be toilet and holding tank.

Jonathan
 
My surveyor came up with a lot of similar carp "recommendations" which the insurance company insist I comply with. Some were purely cosmetic because he thought it would look nice! I've duly put two clips on each fitting, even when two won't fit!
 
J Neeves said:
The ones of which I would be most concerned (that they have 2 clamps) would be toilet and holding tank.
Click to expand...

+1
Like your saildrive, the barbs on my Whale diverter valve have no ridges*, which is plain bloody daft. So they are definitely double-clipped. I'd put three on if there were room.

* Yes, Jonathan, just what is the terminology?
 
The spigots on my water pump (Johnson) don't have barbs/ridges and the delivery side has a short length of hose onto the engine which is plain copper pipe. Not ideal but unlikely to come off as there is very little pressure involved. Vibration could be a problem but I can't see it happening.
 
Note that worm drive clamps (generic name for Jubille clips) are not permitted on comercial gas instalations. There must be something rubbish about them: stalling, crimping and others for sure.

My choice is T Bar clamps
 
I think Dougal meant something like these: http://www.directindustry.com/prod/mpc-industries/bolt-hose-clamp-t-65240-719197.html

As he implied, worm-drive clamps might be regarded as the norm. T-drive are a variation on it (and to my mind the best of all options, partly because they're less inclined to distort from circular when tightened: certainly my preference for, say, attaching a stern gland). "Hose clamp" covers the lot. "Jubilee clip" seems generally to mean a worm-drive clamp, although the Jubilee company makes other sorts.
 
Last edited:
Automotive cooling systems see an internal pressure of 12 psi, maybe more these days. I have never seen one with doubled-up hose clips. My Yanmar is the same, single clips throughout.

Skin fittings see a maximum of a few inches head of water but we are recommended to double clip. I would say that throughout my long history of working on boats I have never known a hose to simply pull off once the hose clip(s) has been removed. In the majority of cases I have to cut them off.
 
You must log in or register to reply here.

Share this page

Top