Radiator drain valve

[MickyP10]

Basic question. Just moved and some of my rads have attached. The drain uses a square head bleed key.

Q: Does this bleed the rad or the pipework to the rad (or both if I fully open the valve) and is there a tool you can get to stop you loosening it and losing water before you can put a hose on it?

 

[terryplumb]

You turn the white valve head clockwise To close it fully. Then remove the little square shaped spindle and secure a hose .If you then open the valve it will drain both that rad and system.

 

[Friday round]

I have these similar looking square peg valves, but on the radiator connecting side. How do these work?

 

[terryplumb]

There is a small ,square ended , shaft up inside the part where a hose would be attached. You use a radiator bleed valve key to unscrew it and remove it. Turning off both radiator valves before you do .

 

[CBW]

Basic question. Just moved and some of my rads have attached. The drain uses a square head bleed key.

Q: Does this bleed the rad or the pipework to the rad (or both if I fully open the valve) and is there a tool you can get to stop you loosening it and losing water before you can put a hose on it?

View attachment 219731

Looks like a Myson Matchmate, and if it is, turning that head will not turn it off.

 

[CBW]

I have these similar looking square peg valves, but on the radiator connecting side. How do these work?
View attachment 220074

As per Terry, this will only drain the radiator though if you close the valves.