Ashcroft 82127 Pressure Gauge 2.5 in Dial Npt Center Back

Product Description

The ASHCROFT 82127 is an analog pressure gauge designed for precise vacuum and compound pressure measurement in HVAC, refrigeration, plumbing, and industrial service applications. It features a 2.5-inch dial with a range of -30 to 0 to 30 inches Hg, making it suitable for reading both vacuum and low-pressure conditions on a single instrument. The stainless steel case provides corrosion resistance in demanding environments. Liquid-filled construction dampens needle vibration for stable readings under pulsating system pressures. Accuracy is rated at 1 percent of scale, appropriate for field diagnostics and system commissioning. A licensed technician or journeyman plumber is the typical installer.

This gauge is used in residential and light commercial applications where vacuum or compound pressure readings are required. Common install scenarios include HVAC refrigerant system monitoring, boiler and hydronic system pressure checks, and plumbing pressure testing. The 1/4-inch NPT center back mount connection allows direct panel or manifold installation, keeping the dial face forward and readable without offset fittings. Its compact 2.5-inch dial suits both tight equipment rooms and portable test rigs.

Key Features

• Compound range: -30 to 0 to 30 inches Hg for vacuum and positive pressure measurement on a single dial
• Liquid-filled case dampens needle flutter under pulsating or vibrating system pressures
• Stainless steel case resists corrosion in wet, chemical, and outdoor environments
• 1 percent of scale accuracy for reliable field measurement and system commissioning
• 1/4-inch NPT center back mount for direct panel or manifold installation
• Analog dial with 2.5-inch face for clear, direct reading in the field

Compatibility

Designed as an OEM-style replacement or upgrade gauge for systems requiring a 1/4-inch NPT center back mount compound vacuum gauge with a 2.5-inch dial face.

Installation Notes

Installation is typically performed by a licensed HVAC technician, plumber, or refrigeration mechanic. Isolate and depressurize the system before removing any existing gauge or fitting. Apply an appropriate thread sealant compatible with the process fluid to the NPT threads before installation. Do not overtighten the NPT connection, as stainless steel fittings can gall if excessive torque is applied.