Back Flush Filters is used at least two connected in parallel in the collector system.Back Flush Filter get backwash done with the help of manual or automatic control unities.The cleaned water in the system is reversely flowed to the filters has started to backwash with the help of manual or automatic valves. The clean and pressured (min. 2.5 bar) water which reversely flowed is fill the mechanism with diaphragm and 4 unit jet water channel. The pressured water which filled in diaphragm mechanism removes the pressure on discs and the pressured water in jet water channel is flowed from inside to outside to the discs which become free and so that particles are discharged from system. This process is repeated for all other filters.System to operate as efficiently, during the backwash outlet of collector also must be provided a minimum 2.5 bar pressure.