The flush valve from Netafim is used to automatically flush the lines of a drip system at the start of each irrigation cycle. Installed at the end of each drip line or drip lateral, the flush valve releases approximately one gallon of water each time the zone is turned on. If installing an automatic flush valve, make sure to cover it with an 8” irrigation box. We suggest observing the flushing operation after the completion of the installation to ensure that each valve is flushing properly, and then to repeat this observation at the beginning of each irrigation season. Check the pressure and compare to the last maintenance inspection.