The McAlpine W11 Tank Overflow is a plumbing fitting designed to provide a safe and reliable overflow solution for water tanks. It features a 70mm flange and a 3½" tail with an unslotted waste design, without an overflow grid. Constructed from high-quality materials and meeting relevant plumbing standards, it ensures reliable performance and durability. Suitable for various domestic and commercial water tank installations, the 70mm flange provides a secure and leak-free connection. The 3½" tail is designed for compatibility with most waste pipes, facilitating efficient water drainage. The unslotted waste design, without an overflow grid, prevents blockages and ensures efficient drainage. This fitting is easy to install and maintain, making it a valuable addition to any plumbing toolkit. Available in 1¼" and 1½" sizes, and in 3½" tail and 1½" tail lengths.