Value Collection 116AL25V30 Compound Pressure Gauge 30 Psi

Product Description

The VALUE COLLECTION 116AL25V30 is a liquid-filled compound pressure gauge designed for measuring both positive pressure and vacuum in a single instrument. The gauge reads from -30 inches Hg vacuum to 0 to 30 psi, making it suitable for systems that cycle through both negative and positive pressure conditions. The 2.5-inch analog dial provides a clear, easy-to-read display, while the glycerine fill dampens needle vibration and protects internal components in pulsating service. The stainless steel case and fully stainless steel wetted parts deliver corrosion resistance in wet or chemically active environments. Licensed HVAC technicians, plumbers, and industrial service techs are the typical installers.

This compound gauge fits applications where both vacuum and positive pressure monitoring are required. Typical uses include refrigeration and HVAC system diagnostics, boiler and hydronic loop service, pump inlet monitoring, and plumbing pressure testing. The lower-mount NPT connection allows direct inline installation on pipes, manifolds, or test ports oriented vertically. The liquid-fill construction makes it well suited for vibrating equipment such as pumps and compressors where a dry gauge would lose accuracy quickly.

Key Features

• Compound range: -30 inches Hg to 0 to 30 psi on a single dial
• Glycerine liquid fill dampens vibration and protects the Bourdon tube during pulsating service
• Stainless steel case and stainless steel wetted parts for corrosion resistance
• Plus or minus 3-2-3 percent of scale accuracy across the full range
• 2.5-inch analog dial with lower 1/4-inch NPT threaded connection for direct pipe mounting

Compatibility

Designed as a standard replacement or add-on compound pressure gauge for any system using a 1/4-inch NPT lower-mount gauge port requiring a 0 to 30 psi range with vacuum capability.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified service professional familiar with pressurized systems. Depressurize and isolate the system completely before removing an existing gauge or installing this unit. Apply thread sealant appropriate for the service fluid to the NPT threads, and tighten using a wrench on the hex fitting only — do not apply torque through the gauge case or dial. Verify the pressure range of the system does not exceed the gauge maximum before returning the system to service.