Aquatec’s ESO 460 is a normally closed, precision solenoid valve that positively shut off feed water. Activated by a pressure switch to either open or close at predetermined holding tank pressure settings. The ESO Series can either be used independently or mounted inline on the inlet side of a pump. Our ESO Series also includes amodular connector for plug-and-play integration with Aquatec’s other system components.The ESO 460 Series is a conventional, 24VAC solenoid valve. Patented,energy saving 24V coil,which operates without heat build-up or AC coil noise. All integrated control circuitry is hermetically sealed for extended life and maximum reliability under severe operating conditions. The ESO DC100 can be powered by either AC or DC voltage.