Double-filtered pilot-flow design for maximum reliability. Balanced-pressure diaphragm for long life. External bleed to manually flush system of dirt and debris during installation and system start-up. Internal bleed for spray-free manual operation. Energy-efficient, low-power encapsulated solenoid with captured plunger and 90-mesh (200 micron) solenoid filter. Buna-N diaphragm with self-cleaning 90 mesh (200 micron) pilot water filter and captive spring. Operates in low-flow and Xerigation? applications when the RBY filter is installed upstream. 1.25" (3,2 cm) stainless steel phillips head screws. Slip-by-slip configuration for low-cost, solvent-weld installations.