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This listing is for a Pack of 1 Features an integral, lead-free solder ring inside the capillary socket, ensuring a quick, uniform, and watertight joint without needing to manually feed solder in confined boiler spaces. Engineered to withstand the thermal shocks and high pressures of boiler pressure relief valves (PRV), safely conveying boiling water and steam away from the property. Formed to standard dimensions for a neat, compact installation under tight boiler casings while meeting UK Building Regulations (BS EN 1254-2 and Part G3) for safe relief discharge piping. Solder ring fittings provide a tight and durable seal between pipes, minimizing the risk of leaks and water damage in plumbing systems.