The Runxin F56A1 manual backwash valve can be used on any FRP vessel provided that it has a 2.5inch top opening or reducer.
The backwash valve allows you to wash out all the filtered dirt, rust or other particles free from the filter. The backwash valve is operated using the manual handle that can be turned to the various backwash and rinse settings.
The ports on the valve are all 1”(25mm) female threaded ports and are rated for a maximum flow of 4000LPH which is suitable for vessel diameters up to 14"(350mm)