Filtration is a key component of any rainwater harvesting system. For those looking to filter to drinking water standards, or for those using rainwater for non-potable applications, we recommend installing our filter housings with this 20 micron filter element. If you are looking to install to drinking water standards, see our drinking water filtration guide for complete list of recommended components. Filter would be installed after the pump and after the pressure tank but before point-of-use. Use 3/4" MPT connections when installing filter housing. Filter change is recommended every 3-4 months, or when there's a noticeable drop in water pressure.