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This versatile safety valve is ideal for use with hot water, steam, or air. It's primarily designed to protect hot water boilers but is suitable for various applications. Easy to inspect and clean, this valve features a drain plug for sizes DN40 and above. The resilient PTFE seating ensures a high degree of seat tightness. It provides reliable general-purpose protection. The Nabic 1 1/2 inch 542 Safety Valve operates at 6.5 Bar. The resilient PTFE seating design offers a high degree of seat tightness, and the drain plug is included for sizes D40 and above. This safety valve is general-purpose and suitable for hot water boilers. It's available for 1".. Nabic 1 1/2 inch 542 Safety Valve - 6.5 Bar Brass NAB54204065