Wirquin Macdee DSY7425 Metro Rapid Round Siphon - 9.5 inch. Ideal for use in standard size cisterns. Metro Rapid has an easy to remove upper section allowing easy maintenance / replacement without the need to remove the cistern. Flush volumes can be varied between 6/7/9 litres making it suitable for replacement installations. All siphons come complete with siphon back nut, coupling nut, sealing washer and low level flush pipe seal as standard. All siphons come complete with internal overflow. WRAS approved. For internal overflow measure from the cistern to the waterline and add 25mm, ensuring that this measurement is a minimum of 10mm below any aperture in the cistern to decide what height siphon is required for the installation. Manufacturers Code: DSY7425.