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. The Tank Overflow is constructed from high-quality materials and meets all relevant plumbing standards, ensuring reliable performance and durability. It is suitable for a variety of applications, including domestic and commercial water tank installations. The 70mm flange of the McAlpine W11 Tank Overflow provides a secure and leak-free connection to the water tank. The 3½" tail design ensures a suitable size for most waste pipes, allowing for efficient water drainage. The unslotted waste design of the McAlpine W11 Tank Overflow does not include an overflow grid, making it suitable for applications where an overflow grid is not required. This design helps to prevent blockages and ensure efficient water drainage. Overall, the McAlpine W11 Tank Overflow is a reliable and efficient plumbing fitting that provides a safe and secure overflow solution for water tanks. Its 70mm flange, 3½" tail, and unslotted waste design make it easy to install and maintain, and its high-quality construction ensures reliable performance and durability. It is a valuable addition to any plumbing toolkit. ・ Available in 1¼" and 1½" sizes ・ Available in 2 tail lengths, 3½" tail and 1½" tail.