This grey round downpipe from FloPlast measures 2.5m long and 68mm in diameter. It is designed for roof drainage systems to effectively direct rainwater from gutters to ground level quickly and efficiently. Our 68mm downpipe is available in 3 different lengths in most colours: 2.5m, 4m and 5.5m. Circular downpipes are usually used in conjunction with half round, deepflow and ogee gutter systems, but can also be connected to square gutters using the RDS2 adaptor. 2.5m lengths are usually sufficient for rainwater pipe drops on single-storey buildings, while 4m and 5.5m lengths are generally used for buildings of two storeys and above. The pipe has an outside diameter of 68mm. Rainwater pipes are always a pushfit joint; never use silicone or solvent weld on these systems as there might be a requirement to take them apart for cleaning or unblocking at some point in the future.