On 27/01/2018 09:38, Newman wrote:
On 26/01/2018 23:29, John Rumm wrote:
On 26/01/2018 21:54, Newman wrote:

I need to replace a leaking TRV.
Where can I purchase a reasonably priced angled TRV with a 1/2 inch BSP
female inlet?

The BSP female input seems to be a thing from way back, I have not
seen any new ones like that.

A TRV with a push fit base and slightly longer stem might make for an
easy swap, if you can cut the pipe stem to the right length (and
assuming its 15mm):

https://www.bes.co.uk/pegler-yorkshi...fit-15mm-18959


Thanks

It is 15mm. Does a 1/2in BSP fitting have an olive in the pipe?

No, a BSP fitting on an old rad valve was usually just a female threaded
socket. You needed a male threaded connector to connect to it[1]. They
would typically have a flat machined surface where a seal could be made
with a fibre washer. Alternatively, one would use a tapered male
fitting, and PTFE / Hemp or some other thread sealant to make a seal on
the threads.

Modern rad valves usually have a 15mm compression fitting with its own
back nut which does use an olive.

[1] Often a male BSP to 15mm compression adaptor would be used to in
effect turn the TRV into a compression fitting. About the only time the
BSP TRV would be useful directly would be on a system piped in "iron
barrel" pipes with threaded connections. There it could screw directly
onto a threaded pipe tail.

--
Cheers,

John.

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