Inlet is 3/4" female hose thread and outlet is 3/4" male hose thread. Filter is installed between the hose vacuum breaker and the drip regulator and protects drip emitters from rust, sand and other impurities that may clog them. The poly screen is easily removed for cleaning by unscrewing the female hose end of the filter. Drip emitters are less likely to clog if you install proper filtration.
