Potterton Puma 80 Expansion Vessel?

its generally pretty big and red also with a car valve on it. :-) the small brass one with valve on probably auto air vent.

if you can find the valve on the vessel (the big orangey red one), remove the cap and press the pin in. if you get water out generally its had it. if you get nothing out, no water or air, it may just need recharging.

iain
May 2008