NOTE !! SHIPPED DIRECT FROM MANUFACTURER ON A PALLET UK MAINLAND SUPPLY ONLY 53 Litre , VERTICAL TWIN COIL Water Storage Heater Includes TPRV Valve Capacity: - 53 litres (12 gallons) Connections: - Heating Coil 3/4", Cold in & Hot out 1/2" Dimensions: - 785mm long, 380mm diameter Materials of Construction, Tank: copper, Insulation: polyurethane Maximum Working Pressure up to 3 bar (42 p.s.i.) Stored water temperature up to the circulation temperature of the engine cooling water. Use thermostat to limit to 55º - 60º C if necessary Heating Times 15 - 25 minutes