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Automatic Control Valves



Altitude Pilot

Lead Free* Models Available


1/8 in NPT Actuation Ports ( 1/4 in NPT Sense Line Port)


The Model 27 Altitude Pilot is a hydraulically operated, diaphragm actuated, spring loaded 3-port pilot designed to open or close based upon static tank head pressure versus an adjustable spring setting. It directly monitors tank head pressure by a contractor field installed Sensing Line. The large diaphragm area causes the Model 27 to be sensitive to slight changes in tank head pressure.

The Model 27 Altitude Pilot works in conjunction with a 3-Way Accelerator Pilot (Model 22 or Model 22-1) to open and close the Main Valve.

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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.