Duplex stainless steel unvented cylinder providing mains pressure hot water. The solar range features a dedicated high performance solar coil, transferring the maximum amount of heat from the solar circuit to the stored water, providing faster heat transfer than can be achieved with plain tube coils. The cylinder is manufactured using the very latest automated welding procedures along with full post weld treatments guarantee welds that are as strong as the parent metal. The product is supplied complete with compression fittings, lift up P&T valve, 90 degree elbow on hot water draw off and flexible hose to connect expansion vessel.