17mm O/D blue water pipe
Andrew May
external diameter of 17mm. Modern blue MDPE is 20mm as are all the
fittings for it. Anyone know what it is likely to be?
I am guessing that it maybe imperial, possibly 1/2inch internal diameter.
The existing stop-cock has this pipe one side and 15mm copper the other.
It is leaking and I would like to replace it but is a similar part still
available?
Andrew
F Murtz
have stayed the same just renamed to the nearest mm, copper pipe is
measured od. gal pipe is id.
Andrew May
I know but give or take a thin layer of gunge my digital callipers say
just that. I can check again this evening for an exact measurement but
it is certainly not 15mm.
fred
<andrew...@hotmail.com> writes
I was going to suggest using a 20mm MDPE fitting stop cock with a 3/8"
adaptor set in one end and a 15mm copper adaptor set in the other but
the usual suspects eg. http://www.bes.co.uk/products/168.asp stop at
1/2" (I/D) LDPE. Note there is a 3/8" adaptor on that page but not for
your pipe type so I wouldn't recommend it. If you can find a suitable
adaptor/reducing set then this would still be the neatest solution.
The alternative is to use a universal transition fitting first followed
by a conventional 15 or 22mm stop cock but those transition fixings are
huge and it's rare that there's lots of room around a stop cock ;-). For
this you would use BES code 13544 (same page as above) to mate with your
LDPE pipe and use either code 10164 or 9939 adaptor sets to mate with
the appropriate sized copper for your new stopcock.
--
fred
BBC3, ITV2/3/4, channels going to the DOGs
A.Lee
Go to the best local plumbers merchants, and they will have an adaptor
in stock. I had a similar problem late last year, only one merchants
kept the adaptors in stock, and sold loads of them they said.
B+Q/Wickes etc will not be able to help you with the adaptor.
In the late 60's/early 70's there was a shortage of copper, so builders
used whatever they could find, mainly plastic, but sometimes iron with a
nickel coating, which makes it look like old stainless pipe. Beware of
this if you have it in your house, as although looking in good condition
on the surface, the iron/steel underneath is invariably weakened, and
usually collapses when you tighten up a compression fitting.
Tell the merchants where you live, and they will know what adaptor you
need to mate the incoming plastic to 15mm copper.
Alan.
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Andrew May
Just measured again. It's 17.1mm exactly give or take the layer of crud.
You are dead right about the limited space around the stop cock. there
is about 6" of incoming mains. A stop cock with integrated drain point
and then a 90degree elbow into the meter. So not really room for
transition fitting.
I think my initial reaction is to remove the stop cock and give it a
good clean and replace any worn washers etc to see if I can get it
working without leaking.
Then, if that doesn't work look for an alternative.
Thanks for your comments.
Andrew
Andrew May
>
> I think my initial reaction is to remove the stop cock and give it a
> good clean and replace any worn washers etc to see if I can get it
> working without leaking.
>
> Then, if that doesn't work look for an alternative.
>
> Thanks for your comments.
>
Well, stripped the tap down over the weekend. Turns out to be an
ordinary 1/2" / 1/2" stop cock. A short (very short) length of 1/2"
copper pipe had somehow been inserted into the blue incoming mains. Not
sure how and I wasn't going to disturb it but whatever was done is still
holding up.
Means that I couldn't replace the tap because the threads are different
to a 15mm fitting but I did strip down the tap, reverse the washers and
give it all a good clean and descale and it now all appear to be working
without any leaks.
Thanks for all the advice.
Andrew