These professional quality, dual purpose fittings, which can be easily connected to any circular or square downpipe from 65mm up to 100mm, not only collect rainwater, they filter it as well. The filter collector separates and diverts clean water to the storage tank, allowing leaves and other debris to continue through the downpipe. The stainless steel filter cartridge is easily removed for cleaning, and once the tank is full, acts as the overflow outlet.