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The Nabic 542 safety valve is highly versatile, suitable for use on hot water, steam, or air. Primarily designed to protect hot water boilers, its wide range of applications makes it an ideal general-purpose safety valve. It allows for easy inspection and cleaning. Valves size DN40 and above come with a fitted drain plug. The PTFE seating design guarantees a high degree of seat tightness. This reliable valve meets various safety needs efficiently. The Nabic 542 is a 1 inch safety valve with a pressure rating of 3.6 Bar, proving it to be both adaptable and dependable.. Nabic 1 inch 542 Safety Valve - 3.6 Bar Brass NAB54202536