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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 3/4 inch 542 Safety Valve - 3.8 Bar, For the protection of hot water boilers, General purpose, Easy inspection and cleaning, Extremely versatile, High degree of seat tightness, Suitable for use with hot water, steam or air, Resilient PTFE seating design, . Nabic 3/4 inch 542 Safety Valve - 3.8 Bar Brass NAB54202038