The twin wall Rain Cap is supplied in 316 grade stainless steel and is designed to sit outside on top of the flue pipe at the very top of the system. This standard version of our Rain Cap is used to minimise rain entering the flue system. Made from 316 grade stainless steel. 30mm high grade insulation promotes efficient performance and protects against the build up of condensates within the flue system. All twin wall flue components are CE approved. There is only a 50mm clearance from combustible materials needed when using our twin wall flue. Every twin wall flue component is supplied as standard in stainless steel however we do offer a powder coating service to RAL colours for an additional cost, which allows the components to be supplied to you in a range of different colours to better suit your property. Please contact us for more information regarding this service.