David Wrote in message:
On Mon, 05 Mar 2018 23:00:33 +0000, TheChief wrote:
Roger Mills Wrote in message:
On 04/03/2018 17:54, TheChief wrote:
Hi Guys
I am having problems with piping to radiators which has been run
in plastic pipe.
I suspect that the poor performance of the rads is partly down to
15mm pipe being used over a fair length and teed to two rads. There
is also some crud floating around which is blocking the feed pipe,
or restricting the flow.
So I was looking at increasing two 15mm runs to 22mm to help the
flow and decrease the likelihood of future blockages.
Contemplating this leads to the type and reliability of different
joint types. The current 15mm plastic runs connect to the original
22mm copper mains via copper reducing tees/stub pipes and Hep20 push
fit couplers. I have not had any problems with these.
What are the group's current thoughts on push fit Vs compression
on plastic pipe, particularly 22mm?
Some recent posts suggest that Hep20 fittings are not as reliable
as previously.
Thanks
Phil
Either works ok. I don't have much experience of Hep2O fittings, but I
have used JG Speedfit quite a lot, to good effect. If using compression
fittings on plastic pipe, make sure you use the right inserts -
preferably metal.
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Hi Roger
Is the Speedfit range dismantlable?
I was about to ask the opposite.
Are the Hep2O joints those with the metal fingers in? Which need a special
tool to take apart again? If so, I never got on with them and had major
problems with 'fit and try' then take apart again. Bought some by mistake,
tried to use them, think I still haven't thrown them yet.
The SpeedFit joints are really easy to fit then take apart again, but seem
fine when locked with the sliding collar. I've used them with 22mm pipe
and a seriously powerful shower pump without any problems.
I've used compression joints with plastic pipe and again that seems to
work well as long as you have the inserts inside the pipe to stop it being
crushed.
Cheers
Dave R
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Thanks Roger/John
Yes I think you are talking about Hep20 there. I have used these
in easily accessible places, but have noticed over the
years
that Speedfit has been given better press by the
group.
If I go with replacing the 15mm runs with 22mm I really need
joints I can fit and forget in one of the locations.
I'll take a look at Speedfit for this operation.
Phil
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