"Set Square" wrote in message
...
In an earlier contribution to this discussion,
mackem wrote:


It's just the pipes I want to drain, so like you say I think I'll put
a T piece just above the stopcock. From looking in the Screwfix
catalogue it's not clear how I would attach a drain cock to the T
piece.
How would I do this?
Tia

It depends on which technology you choose!

Screwfix 13349 or 17843 are designed to be used with solder fittings. They
have a 15mm inlet pipe which has to be soldered into the branch of the
tee.

Screwfix 65868 screws in. You would use this if you are using compression
fittings. You would need a 15mm comp x 15mm comp x 1/2" BSP female iron
tee - which has a threaded boss on the branch for the drain fitting to
screw
into. [Can't see one in the Screwfix catalogue - but your local plumbers
merchant will have one.] Seal the threads with PTFE tape.

With my level of expertise it'll have to be brass compression fittings !!
I'd seen the Screwfix 65868 drain cock which is referred to as 1/2 inch bsp
but what threw me was that the picture in the catalogue shows a plain shank
where I was expecting to see some threads.
However, problem now solved. I was looking for a 15mm x 15mm x 1/2 bsp T
piece on the BES site and found a 15mm T piece with a built in drain cock
http://www.bes.ltd.uk/nav_graf/frames_cat.htm
Thank you very much for pointing me in the right direction - much
appreciated.