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The Nabic 2-inch 542 Safety Valve, rated at 3.5 Bar, is a versatile and reliable solution for hot water, steam, or air systems. Primarily designed for protecting hot water boilers, this safety valve is adaptable to a wide range of applications, making it a great general-purpose option. For sizes DN40 and above, it includes a drain plug, allowing easy inspection and cleaning. Its resilient PTFE seating design ensures excellent seat tightness, offering enhanced durability and leak prevention. This valve is a dependable choice for maintaining system safety and performance.. Nabic 2 inch 542 Safety Valve - 3.5 Bar Brass NAB54205035