Anti freeze top up

[Tezmax]

 been waiting for drop in water level for 12 months and the old Gal just hasn't used any

Is there a drain valve anywhere which prevents air getting back in the system so i can
top up with some anti freeze before the next sub zero weather.

thanks.

[rio_gti]

Yep, bottom right hand side of the rad if looking at the car, little black valve just twist it 1/4 turn then pull it and it will release fluid (also a garden hose will fit on the little spout)