The threaded Brass Water Pre-Filter is installed in the front section of the pipeline and placed behind the tap water meter, which can ensure that the rust and impurities suspended in the pipe network will not cause harm to the human body, and will play a positive role in protecting the domestic water heater, solar energy, washing machine, water purifier, pipe network, valves and other aquatic products, greatly extending the service life and quality. It can remove more than 98% of the plankton, seaweed, rust, sediment and other large particles in the water.