The Metro Rapid Oblong DSY8825 8-inch siphon is WRAS Approved and features a flush volume selector for 6/7/9 litres, adjustable on the oblong bell housing. This three-part siphon is designed for easy maintenance with a quick-release coupling nut. It includes a siphon back nut, flush pipe coupling nut, siphon seal, and a low-level flush pipe seal. For optimal performance, measure from the base of the cistern to the waterline and add 1 inch, ensuring this measurement is at least 10mm below any cistern aperture. This siphon is ideal for use in standard size cisterns and allows for easy removal of the upper section for maintenance. It is compatible with C-Link 2.25" connections.