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Control Valves

S127-11, S1127-11

One-Way Flow with Delayed Opening

Lead Free* Models Available


The WATTS ACV One Way Flow Altitude Valve with Delayed Opening Feature is designed to open, allowing flow into a reservoir or elevated storage tank (tank fill), and close drip tight when high water level is achieved. It controls water level by remotely sensing static tank head pressure through a field installed sensing line, and opens when the water level is below the adjustable setpoint and closes drip tight when the level is above the adjustable setpoint. The valve also has an adjustable delayed opening feature, allowing a calculated "draw-down" of water level, before opening for tank fill operation to increase water circulation through the tank.

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

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