Inflation is via a bellows end fitting which is a push-fit into the valve.
To start deflation push down the white central spindle and give it a quarter turn
anti-clockwise to lock the valve open. Turning the spindle clockwise returns the diaphragm to its seat and seals the valve.
The A7 Valve is sometimes used instead of the newer B7 and C7, where completely flush fitting is required. This requires the use of the recessed mounting.
Available in black or grey.