Suitable for Calor 7/12/15kg and Flogas 7/13kg refillable gas cylinders. Inlet size 21mm. With overflow level indicator to allow visual gas level monitoring and convenient leak testing. To maximise safety all Cadac cylinder regulators are now factory fitted with a crimped 85cm hose and QR fittings. The added safety feature EFV (Excess Flow Valve) comes as standard. EFV is an automatic hose safety feature that automatically cuts off 90% of gas flow if the hose is compromised. The QR fitting acts to stop gas flow if the joint is disconnected from the BBQ and the regulator has a convenient and safe snap-on attachment mechanism.