An S flange, also known as a Surrey flange, is an essential bit of kit which must always be used with any of our Salamander shower pumps.Made from high quality materials and easy to install, the S flange ensures that air bubbles don\'t enter your pump, causing premature wear and tear.When used correctly with a shower pump, the S flange will help to increase the longevity of your product.For added peace of mind, this high quality Surrey flange comes with a 1 year guarantee.