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The Nabic 1 inch 542 Safety Valve - 2.1 Bar is a versatile and reliable solution, ideal for use with hot water, steam, or air. Primarily designed to protect hot water boilers, it also serves as an excellent general-purpose safety valve across various systems. Its durable PTFE seating ensures a high degree of seat tightness, offering secure and efficient performance. For easy maintenance, it allows quick inspection and cleaning, and sizes DN40 and above are equipped with a drain plug. This safety valve delivers dependable protection and ease of use for any compatible system.. Nabic 1 inch 542 Safety Valve - 2.1 Bar Brass NAB54202521