This is Atlantic Water Garden's Back Flush Kit for the BB FilterFall. We have a large selection of Filtration/FilterFall Replacement Parts and other water features from Atlantic Water Gardens.

Manufacturer's Description
When used with Matala filter kits, Atlantic's professional Back Flush Kit virtually eliminates FilterFall maintenance. Add a Back Flush Kit to any Pro Series FilterFalls for fast, convenient, powered backwashing to save you time, trouble and a whole lot of mess.