HARIT 1"- Inch Inlet-Water Tank/Screen Filter Y Type-120Mesh/130 Micron with 1 Extra Cartridge and 1 Easy to Clean Valve HARIT screen filter is a sediments filter used to block passage of sand,silica,iron type sediments of 130 micron size from overhead tank to sanitary fixtures NOTE: SCREEN FILTER CAN NOT CONTROL CALCIUM/SALT/HARDNESS OF WATER as its not a softener or water purifier