Which one is my bleeding valve?

[Merlot786]

Can anyone tell me, from looking at the attached pics - is my bleeding valve the thing at the top of my radiator (2nd pic) or the square shaped hole at the upper right hand side? (3rd pic)

 

[corgiman]

2nd pic

 

[superdupergasman]

2nd pic.....have you got a key to fit this.....any hardware store will sell you one.

Always bleed with system off, its safer for the DIYer.

Rad also only needs blead if its hot at bottom, cold at top.

 

[Merlot786]

Ah so it's the one on the top.

Yes I'm planning to go and buy a key tomorrow - may have to remove the top of the radiator in order to get it to fit the valve I'm thinking.

Thanks for your help