One of our radiators is leaking from the pipe that joins the radiator at the opposite end to the valve. The collae is broken and obviously needs replacing but I am unsure about draining the radiator and if I need to drain the whole system??

Chris Gater, August 2006

you can plug the system in the loft or drain the system down then replace the collar or place new trv,s (thermostatic radiator valves) hope this helps

mjkeegan domestic plumbing & heating, September 2006