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i like these taps!.

but there is good ones and bad ones.

what you have not done is cut the hole deep enough or the cutter part has blunted and not pierced the pipe which happens with the crap ones.

clamp to pipe but not too tight as it may crush it then leak.

screw the cutter in all the way down to the nut.

or pay someone £50 off here or £65 out the book.
 
I refuse to fit these horrible things and if a customer insists on supplying one, I don't offer a guarantee and still charge the same as would if I supplied and fitted. Any decent plumber will supply & fit you a tap for between £50 and £60 with an internal isolation valve.
 
Pressure is how hard the water wants to get out of where you're keeping it. Flow is the amount of it which can escape at one time when released. These self-cutting taps won't effect pressure - it still wants out just as bad. But they will effect flow - only so much can come out of a small hole. The size of hole these kits cut is not in itself necessarily a problem. And installed properly or working properly - whichever happens to be releavant - it should work. It will never be as abundant and spurt-resplendant as a traditionally installed set-up with normal fittings and pipe but the fact that it comes out with only a dribble either means...

1) As previously alluded to, it has not been installed correctly. The toss-up between leaking connection and proper flow is something of a pointer towards this liklihood.

2) It is faulty. This could of course occur in conjunction with number 1.

It could also be a combination of all or any of the following:- an unusually ineffective cheap kit, a unfortunately poor installation, unsually poor main pressure.... It's more likely 1 and/or 2.
 
On friday I had to go to a job where a plastic self cutting W/M tap like this had broken and drenched the place.

What happens to the piece of copper that gets cut out too?Could end up anywhere.
 
What happens to the piece of copper that gets cut out too?Could end up anywhere.

ooops is that what those stomach pains are?

lol the only thing these self tappers are good for is draining a heating system when there is no doc
 
youll need :
full bore isoalating valve
out side tap
compression T
wall plate elbow
lenth of pipe
PTFE tape
I use fernow water hawk
£15 the lot mate depended on the run about 45min job maybe

i would add a double check valve to this list to comply with the water regs
 
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