- Tap filter serves as a pre-filter after the water meter and before the drinking water purifier in the home supply. It helps reduce blockages in heating pipes and washing machines, extending their service life. It effectively removes deposits, rust, sediment and other large molecular contaminants in hard water. - 100% SAFE MATERIALS - BPA FREE. 40 micron food grade stainless steel mesh prevents particles larger than 40 micron from entering your home. The valve head is brass. The explosion-proof transparent filter housing, made of aircraft polymer, withstands burst pressure over 725 psi (5 MPa) and provides frost protection and water impact resistance. - Convenient to use - After installation, open the shut-off valve to drain wastewater. It filters and releases the waste water automatically. No professional instructions are required; wastewater draining takes about 30 seconds and begins initial filtration of tap water. The housing has internal and external threads for easy installation. - Rinse and reuse - The filter is reusable and should be cleaned regularly. Simply open the bottom valve, and the pre-filter will automatically clean the sediment filter. Cleaning frequency depends on water consumption, sand content and water hardness. - Applications - Use as a pre-filter for drinking water before the purifier; protect household appliances such as heating pipes and washing machines from deposits and rust; suitable for hard water areas to reduce deposits in pipes and fixtures.