pressure vessel central heating system - how to drain?

[ntvrman]

Hi,

I recently installed a second towel radiator in our bathroom, branching it from the existing rad. But the wife doesn't like the pipe work exposed up the wall and around to the new rad. What i need to do is run new pipe work under the floor up the the new rad, but to do this i need to drain down the central heating system, could someone advise where they think the drain valve would be?.

Neal.

 

[TicklyT]

It could be anywhere, depending on how your particular system is piped, and the whim of the installer.

Drain-offs are generally most useful fitted at the lowest point of a system.

Some systems don't have a drain-off installed at all. in that case the system can often be drained by disconnecting one of the pipes to a radiator.

Some would fit a self-cutting washing machine valve as a temporary draincock, then replace it with a proper draincock once the system is empty.

 

[bengasman]

How did you drain the system when you installed the rad?