100mm Drainpipe with 65G UPVC Channel. A 65mm wide UPVC channel is connected via downpipes at 200mm intervals to sockets in a 100mm drain below. This allows the channel to be installed level while the drainpipe is given sufficient fall to be self-cleaning. The Special Assembly is then completed with a stainless steel grate from the AR, TR or PS series. Please be aware that depending on the installation environment, for a pool installation or close to a surf beach, you may need to have your stainless steel grates electropolished. This unique drainage system was recognised for its innovation by a DesignMark at the Australian International Design Awards.