On Wed, 26 Jan 2005 21:26:52 -0000, "Set Square"
wrote:

I've got a Combi boiler system, three of my rads have no thermostat
fixed and I want to fix one to two of them.

Do I have to drain the entire system to do so of is there a way round
this.

Geoff Lane

You'll have to at least partially drain it - and obviously the rads
themselves.

Start with one of the rads. If there's a drain cock in the pipe next to one
of the valves, use that - with the valve open - to drain the rad and pipe in
one go. If there isn't, it gets a bit messier. Priceed as follows:

Snipped

Thanks for very in depth reply; I've fitted a rad with thermostat
before but some years back and forgot the procedure.

One will definitely be a new rad as well.

Geoff Lane