Value Collection 115AL25VAC Vacuum Gauge 2.5 in Dial

Product Description

The VALUE COLLECTION 115AL25VAC is a glycerine-filled vacuum pressure gauge designed for monitoring negative pressure in plumbing, HVAC, and industrial service applications. It features a 2.5-inch analog dial with a measurement range of -30 to 0 inHg, providing clear readings under vacuum conditions. The stainless steel case resists corrosion and mechanical damage, while brass wetted parts and a bronze Bourdon tube make it suitable for a wide range of compatible media. Accuracy is rated at plus or minus 3-2-3 percent of scale. The glycerine fill dampens needle vibration and protects internal components from pressure spikes, improving readability in active systems.

This gauge is suited for residential and light commercial HVAC, refrigeration evacuation monitoring, plumbing system diagnostics, and general vacuum service work. The lower mount configuration with a 0.25-inch NPT threaded connection fits standard gauge ports on manifolds, vacuum pumps, and piping assemblies. Licensed HVAC technicians and plumbers are the primary installers, though experienced service professionals in adjacent trades also use this gauge type for system verification and troubleshooting.

Key Features

• Glycerine-filled case dampens needle vibration and extends gauge service life in pulsating systems
• Stainless steel case provides corrosion resistance in wet or humid environments
• Brass wetted parts and bronze Bourdon tube for durable media contact
• 2.5-inch analog dial for clear on-site readability
• Lower mount 0.25-inch NPT connection fits standard vacuum and plumbing gauge ports
• Plus or minus 3-2-3 percent of scale accuracy across the full measurement range

Compatibility

Designed as a standard lower-mount NPT vacuum gauge suitable for use with vacuum pumps, manifold sets, and piping systems that accept a 0.25-inch NPT gauge port connection.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber following applicable local codes and IFGC or IPC guidelines as appropriate. Isolate and depressurize the system before removing or installing any gauge. Apply thread sealant rated for the service media to the NPT threads, but avoid over-tightening, which can crack the gauge body. Do not exceed the rated vacuum range; exposing this gauge to positive pressure above its design limits will damage the Bourdon tube.