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.
--
Roland Perry