U.S. Elettrovalvola Elettrica Solida 3/4 Pollici 110V AC Acciaio Inox N/O
3/4" Solenoid Valve - 110/220V AC Stainless Steel Normally Open Solenoid Valve, Viton Seal. Pilot-operated solenoid valves work by first opening a small pilot valve when energized, which then uses system pressure to operate the main valve.