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This extremely versatile safety valve is suitable for use with hot water, steam or air. Although designed primarily for the protection of hot water boilers, its compatibility with a wide range of applications makes it an ideal general-purpose safety valve. Ensuring easy inspection and cleaning, this safety valve features a resilient PTFE seating design with a high degree of seat tightness. Features & Benefits: Nabic 1/2 inch 542 Safety Valve - 1.8 Bar, Extremely versatile, Suitable for use with hot water, steam or air, For the protection of hot water boilers, General purpose, Easy inspection and cleaning, Resilient PTFE seating design, High degree of seat tightness, . Nabic 1/2 inch 542 Safety Valve - 1.8 Bar Brass NAB54201518