Originally Posted by Stan450
I was only reading your post yesterday about the pumps and was just about to click the buy button but said I'd wait till I got people opinions on it!
Not know if all the valve are the same but on mine you unscrew the cap to reveal the valve and if you press the centre it realises air, as soon as you release the centre the valve closes. Or press the centre and twist and it will leave the valve open.
When pumping are you meant to have the valve open or closed?
I suspect you have halkey Roberts Valves. When filling you have the valve closed and the bit on the end of the adapter that comes with the pump presses it in and instantly seals when you unscrew the pump pipe. You need to screw the adapter in about 1/3rd turn and it will hold in. The pump switches off automatically. You must leave both ends connected as you rotate to unscrew so it holds the pressure.
Rotating it in is a little stiff at first and you must turn the grey bit on the adapter of the pump not the black tube.
Those pumps rearly are good and they hold in which is half the battle.
It takes a couple of goes on a valve to get the knack but once you have it you will be very pleased
Get one you will not regret it. Buy from Dechlon however as that is where you get the best price