How various types of pre-filters work
The pre-filter is usually a "T" type structure. The left and right ends of the "one horizontal" position above are the inlet and outlet. The "one vertical" position below is the cylindrical filter inside the fuselage and the inside, and the lowermost end is the sewage outlet, which is controlled by a valve to open and close. Usually installed in the water meter of the water inlet pipe to ensure that a large amount of sediment impurities generated in the pipe network will not cause harm to the hu...