The 'Snap on Compact' is a dometic regulator designed to supply gas to appliances at a pressure and capacity as indicated on the label on the top of the regulator.
Note: The 'snap on compact' is designed to prevent it being fitted to the valve unless the handle is in the "off" position so do not attempt to fit it when handle is not in this position.
Caution: If you are unable to turn the regulator handle to the "on" positio, this means that your 'snap on compact' is not correctly connected to the valve. Do not force the handle to open and restart the operation descibed in the instructions.