Engineered to handle the dirtiest water, these reliable valves offer a straight-through flow pattern, reducing the risk of failure due to trapped debris. The unique tilted diaphragm creates a better flow path than traditional globe-style electric valves by decreasing friction loss and increasing flow rate. ProSeries 100 valves have a self-cleaning screen - the straight flow path allows debris to move through and the water flow cleans the diaphragm filter screen. An optional manual flow control precisely adjusts flow to the zone. The removable handle prevents tampering. The captured plunger solenoid allows easy removal when servicing – avoiding loss of internal parts. Epoxy encapsulated solenoid design ensures longevity. This is the 1" thread.