The Calor Essentials Propane 37mbar 4kg Manual Changeover Gas Regulator Kit with OPSO is a low-pressure Wall Mounted Regulator fitted with the latest Consumer Safety protection system required by the UK standards to cover all fixed pipework installations. Ideal for all types of LPG cylinder applications. Domestic, Commercial, Catering, Inland waterways, Holiday and Park Homes.Manual Changeover Cylinder kit supplied with testpoint ball valve on the outlet. Supplied on a universal bracket for wall mounting with two pigtails for connection to a twin-cylinder installation.Kit Contents CSR Propane Regulator, 3/8" Testpoint, Cylinder Connection Pigtails with Excess Flow And Non-return Valves, Mounting Bracket, Shut-off Valve & Emergency Control Plaque.This item must be installed by a Gas Safe registered engineer.Type CalorCapacity 4 kg/hourPressure 37 mbarPressure relief valve setting 75 mbarCSR OPSO setting 125 mbarInlet POLOutlet 3/8" Bsp femaleGas Type Propane