I want to join 15mm copper pipe to another pipe which is Imperial
polyethylene, Class C, low density to BS 1972/67, and installed around 1968.
This polyethylene pipe is of nominal size half inch, with an outside
diameter of 21.5mm, wall thickness a little under 3mm. It is black in
colour, and is to be used overground.
For the connector, will it be all right to use a metal (such as Kuterlite)
22mm to 15mm reducing fitting, with a three-quarter inch imperial copper
olive at the 22mm end going over the polyethylene pipe? I have a metal pipe
insert available that was left over from when the pipe was originally
installed in around 1968.
Thanks John for your thoughts. I shall probably go ahead and see what
happens, as you think it may well be all right.
I have since discovered that Kuterlite list a fitting, K1710KP that is
marked Polyethylene to Copper,1/2 inch x 15mm, which seems to be made for
this job, but I have not yet found anyone who sells them singly. And the BES
fittings are a bit more bulky than the Kuterlite type and I have got limited
space to get the fitting in.
John and Roger,
What has happened is I have eventually been able to find a local supplier of
that K1710KP fitting. It has a brass 15mm olive at the copper-connection
end, and a copper olive at the other end for the polyethylene-connection.
The nut at the polyethylene end has a finer thread than that at the
copper-connection end, and, so says a leaflet, is made of a copper alloy.
So it will make sense to use this specialist fitting now I have got it,
though whether the long-term end result will be noticeably different from
putting a 3/4inch olive in a standard fitting I do not know.
Thank you for your input.
In an earlier contribution to this discussion,
Anode <notvalid> wrote:
Well, you obviously won't go wrong by using the proper thing!
On reflection, I can't be sure that that's not what I've got. It *looked*
like a 3/4" compression joint, but it could well have been a K1719KP or
equivalent. [It's buried deep under my sink, so I can't easily re-check].
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.