Key Benefits Precision Calibration: Designed for an exact 2-7 PSI operating range to maintain tight control over valve positioning

For high-pressure steam applications exceeding this limit

allow for precise height adjustments tailored to specific boiler vessel requirements

For contractors managing large-scale air distribution

Can I use this for corrosive refrigerants

McDonnell & Miller 42S-N Controller Els PW 17895 Key Benefits Precision Calibration: DesignedMcDonnell & Miller?42S N Combination Low Water Cut Off and Pump Controller with SPST Snap Action Switches and Glass Connector for Steam Boilers (Part Number 129802) This item is not qualify for free shipping.