Ashcroft 82120 Pressure Gauge 2.5 in Dial Npt Center Back

Product Description

The ASHCROFT 82120 is an analog pressure gauge designed for accurate system pressure monitoring in HVAC, plumbing, and industrial service applications. It features a 2.5-inch dial with a dual-scale range of -30 to 0 to 60 inches Hg, allowing technicians to read both vacuum and positive pressure on a single instrument. The stainless steel case provides corrosion resistance in demanding environments. Accuracy is rated at 1 percent of full scale, making it suitable for diagnostic and commissioning work where reliable readings are required. The 1/4-inch NPT center back mount connection simplifies panel or manifold installation.

This gauge is appropriate for residential and light commercial HVAC systems, refrigeration service, plumbing pressure testing, and general fluid or gas line monitoring. The center back mount configuration is a common choice for panel-mounted gauge installations and manifold assemblies. The non-liquid-filled design keeps weight low and suits standard indoor service conditions where vibration and pulsation are minimal. Licensed HVAC technicians, plumbers, and refrigeration mechanics are the typical installers and end users of this gauge.

Key Features

• Dual-scale vacuum and pressure range: -30 to 0 to 60 inches Hg
• 1 percent of full-scale accuracy for reliable diagnostic readings
• 2.5-inch analog dial for clear, at-a-distance readability
• Stainless steel case for corrosion resistance in service environments
• 1/4-inch NPT center back mount for straightforward panel or manifold installation
• Non-liquid-filled construction suitable for standard indoor service conditions

Compatibility

Designed as an OEM-style replacement or service gauge for systems using 1/4-inch NPT center back mount pressure ports, typical of residential and light commercial HVAC, refrigeration, and plumbing applications.

Installation Notes

Installation should be performed by a licensed HVAC technician, plumber, or qualified service professional. Isolate and depressurize the system fully before removing or installing any pressure gauge. Apply thread sealant or PTFE tape to the NPT threads per standard plumbing and HVAC practice, taking care not to over-tighten and damage the gauge body. Consult applicable local codes, including IPC and IFGC, for pressure testing requirements specific to the system type being serviced.