Speedfit plastic pipe and brass compression fittings Which Insert to use?

Johndigits

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Sep 19, 2007, 5:10:16 PM9/19/07

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I've been rejigging the central heating, with a new rad fitted in one cold
spot in the house.

I've been using this JG Speedfit plastic pipe (things are a lot easier
than they used to be, aren't they!), and have come to the point where I
want to join it to some old copper pipe. Frankly, being a bit of a luddite,
I dont trust the speedfit coupling on the old grungy copper pipes, and am
going to use brass compression fittings with olives etc.

However, when I stick the whizzy Speedfit pipe insert into the pipe and
offer it up to the compression fitting, I note that the olive only has
about 1mm of pipe to grip because the insert sticks out about 4 or 5mm.
This doesnt seem like enough to me - I'm afraid the olive will pop off and
flood me out when I am least expecting it!

The speedfit website shows a special insert for use in this situation, BUT
nobody seems to stock them - not Screwfit, Gibbs and Dandy, Plumb Centre,
or any of the local merchants.

I'm thinking that there must be a 'work around' that the trade use. Anybody
know what pro plumbers use for the insert when they're connecting Speedfit
into a compression fitting?

the_constructor

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Sep 19, 2007, 5:35:53 PM9/19/07

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"Johndigits" <johnd...@hotmail.com> wrote in message
news:Xns99B0E24C6FA23Jo...@62.253.170.163...

I have used the Speedfit couplers dierct to the old copper pipe and never
had any problems at all.
I have even got one between the copper pipe and my shower inlet and
everything is working fine
--
the_constructor

Don't tip it, recycle it. Join your local group.

http://freecycle.org/display.php?region=United%20Kingdom

fred

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Sep 20, 2007, 2:45:09 PM9/20/07

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In article <Xns99B0E24C6FA23Jo...@62.253.170.163>,
Johndigits <johnd...@hotmail.com> writes

Try standard inserts (code 7139) about half way down this page
http://www.bes.ltd.uk/products/155.asp which have a shorter flange than
superseal inserts (with the O-ring) (code 11631) just above. You don't need
the extra O-ring as the olive seals on pipe & fitting.

Or was it the standard ones you were concerned about?

I agree with you using compression to link copper & plastic, I'll always
make the fitting at least as strong as the strongest item to be jointed
(IYSWIM).
--
fred
Plusnet - I hope you like vanilla

Johndigits

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Sep 20, 2007, 5:10:12 PM9/20/07

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fred <n...@for.mail> wrote in news:LjxS0EAW$r8GFwQ0@y.z:

Thanks Fred - I couldnt find these "standard inserts" anywhere locally. The
superseal ones looked like trouble in the compression fittings, so I'll
order up a swag of the standard ones now.

Much obliged.

Capt T

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Sep 25, 2007, 9:39:27 AM9/25/07

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You say the insert "sticks out" it should be flush with the end of the
pipe..Knock it in with the side of a wrench or whatver to hand.The end of
the pipe should be cut square of couse before hand. You should then find the
pipe is held quite well with the olive in a normal position. 1 mm grip is NO
good.
I have just fitted a new rad extending like you with the bendy barrier pipe
and plug on fitting.
Have fun

Andy