On Fri, 30 Oct 2020 13:31:27 +0000 (GMT), Dave Plowman (News) wrote:

In article ,
Roland Perry wrote:
In message , at 11:02:41 on Fri, 30 Oct
2020, "Dave Plowman (News)" remarked:
In article ,
Roland Perry wrote:
There's a special place in hell for plumbers who install a central
heating system without a drain cock.

I put mine in the cellar - the lowest point. Then realised you very rarely
need to drain down the entire system completely. So fitted one to a rad
convenient for outside access. That drains the system down sufficiently
for most things.

Yes, I'm putting my new one about a foot from the back door.

Assuming you have a rad in that room, why not a combination gate
valve/drain point. With some hose to get it outside.

Not sure that I'd want to use a gate valve anywhere, judging by their
'performance' on open systems. Had more fail to work than have worked.
--
Peter.
The gods will stay away
whilst religions hold sway