Toilet hose trauma

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mick

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I know this subject has been covered many times in the past, but I'm at a complete loss as to why my toilet discharge hose refuses to go onto the seacock stub. I've tried all the usual techniques, hot-air gun, boiling water, KY jelly (at my age), wooden cone to enlarge the hose opening. The thing will go on about 1 cm and no more. The hose is the usual white chandlery stuff , and a Blakes seacock. I've never had this problem before. I might add that the hose went onto the toilet end easily.
 
You may have to heat the hose end (about 30mm) so that it becomes elastic.
Be Careful you don't burn your hands, it will be mad hot, and careful as you push it on as when its in an elastic state it can also distort.
 
I know, I know, I've done it several times. That's why I can't understand the problem this time around.
 
How about warming the seacock stub up a little first by wrapping a flannel strainght from v. hot water round it for 30 secs, so the warmed hose doesn't cool so quickly when you slide it on?
 
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Has an inner surface of the pipe delaminated and ruched thus preventing the pipe from passing freely over the stub?

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No, the tube is perfect.
 
Hi
i had a simular problem before, hard to explain but hear goes,
place two bits of wood in the hose,now place a spacer between the two bits of wood,place a hose clip over the end of the bits of wood and slowly do it up while pouring hot water over the hose,this slowly expands the hose i found it best to let the hose go cold before releasing,well i under stood it....i think
 
Hi, this is exactly the prob we had! It was solved by gently heating the seacock with a heat gun for 20 ish seconds and then using a freshly boiled kettle to plunge the hose into for about 10-15 seconds and with a quick smear of good old fairy liquid on the seacock & frantically ramming it on also trying not to knock over the kettle! Even then it was 3rd time lucky so get everything ready and hit the deck quickly before everything cools down! GOODLUCK!
 
NickNapper has the answer! Any amount of heating of the hose will soon be lost with heat transfer to a cold seacock. That is why you can get it on a couple of CM only.

Put the end of the hose into a container of boiling water, keep it close to the area where you are working, now pour boiling water over the seacock, go on lots! Get the thing nice and warm, Now , and dont waste a second, get the hose onto the seacock, it'll work!

I speak from experience not theory.
 
I wrote a post on how I had to do this, but for some reason the search doesn't find it. What I did was to pre-form the hose at home, then take it to the boat ready to fit. My 38mm hose needed to be stretched by about 3-4mm before it would fit over the Blakes stub.

To soften the hose enough it needed to be in almost boiling water and the forming needs to be done almost straight-away.

The pictures here hopefully are self explanatory ...

IMG_0180Before.jpg


IMG_0175Stretching.jpg


IMG_0177Stretched.jpg
 
Once you've got it on the first bit, close the seacock, raise the free end of the hose and fill it with v hot water. Wait a minute or two, open the seacock to let that water out, close it again and refill. This gets the hose and seacock well hot, so the last bit slips on fairly easily. Beware if the hose slips off you coiuld scald yourself if you've used hot enough water.
The downside is you will have to remove the other end from the toilet to get the water in.
Derek
 
If you really can't do it with reinforced hose, you may have to use plain hose. A deep pan of just boiled water right next to the seacock for instant transfer may just tip the balance in your favour.
 
On my boat these pipes almost slide on - a tightish fit, but no problems.

surely 38mm is 38mm?

Why, oh why, are seacocks made just that little bit too big for the pipe, (or vica versa) .... or.... as it is a common problem, why doesnt someone make a 40mm diameter pipe.

Or is it because the cocks are imperial, and the pipe is metric?
 
Having just done some plumbing of that size on my boat which was built I suspect in imperial, modern 38mm seems just a trifle smaller. Getting 38mm pipe onto a late 70s LAVAC/Henderson pump was shall we say interesting, whilst there was no problems at all with the new fittings.
 
I'm sure 40mm is available - the seacocks (and hoses and toilet fittings) in my Jeanneau were a selection 30mm 40mm and 50mm sizes I seem to remember. They were all metric and the 40mm was just slightly out from the UK popular size of 38mm (1.5 inches)
Regarding heat - I'm sure that some plastics will only take the heat for expansion once. Try to heat and fit just once. Once heated and cooled the first time, the next just will not soften as much.
Once the pipe is a few years old they don't tend to expand to the heat treatment at all - buying new is quicker....
That's what I've found anyway - after spending ages trying to refit the old hoses, a visit to the chandlery saved so much time when back on board with new hoses. Each one went on after just a ten second dip in a pan of very hot (not boiling) water.
 
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