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General description The McAlpine MACTUN-2 is a combined tundish and non-return valve designed to provide a reliable and efficient solution for protecting against backflow in various plumbing applications. It features a silicone membrane seal that ensures a tight and reliable seal, even in hard water areas, making it suitable for both residential and commercial plumbing systems. The MACTUN-2 is constructed from high-quality materials that resist corrosion and withstand high temperatures, ensuring durability and longevity. Technical specifications Inlet size: 15/22mm Outlet size: 1.25'' Temperature Rating: 100°C Maintenance: Generally maintenance-free Usage The MACTUN-2 is designed to prevent backflow, which can cause damage to plumbing systems and create a risk of contamination. The non-return valve allows water to flow in only one direction, while the tundish provides a visual indication of any excess water present in the system. The self-closing membrane opens to allow discharge to