how to drain radiator

[larco]

Hi,

I have a radiator drain off valve like the one below but it is attac hed to the trv side rather than the lockshield side.
How can i open the valve to let the water out? is there a tool to use?

Many thanks


http://www.plumbingsupplyservices.co.uk/acatalog/pegler-ang-drainoff.gif

 

[jackpike]

flick off the white cap, beneath is a screw that a rad bleed key fits on to, just put the key on and turn anti clockwise,

 

[tincup]

Hi

Same tool used for bleeding rads.

HTH

 

[larco]

flick off the white cap, beneath is a screw that a rad bleed key fits on to, just put the key on and turn anti clockwise,

mine is attached to the trv valve. Do i need to remove the trv cap?

 

[kevplumb]

no just close the trv and the lockshield before you drain

 

[jackpike]

if you want to drain just the rad, turn both valves off, if you want to drain the whole system open both rad valves
caution, the trv's wont allways shut off completly, you will know this as you start to drain,(it wont stop running) so you will have to open the valves and drain the full system

 

[kevplumb]

or (depending on the valve)

stick a 5p under the head and screw it down

as i would bet a $ you dont have the decoraters caps

 

[The Madman]

Is it possible to drain a full system like this? And if so, one would presume the boiler (hot water) should be off? Although in that case how would the water in the system that is below the radiator be pushed out, if not by the pump on the heating system?

I can't find the drain valve/tap on my system so this would be really useful for me.