Ashcroft 82142 Pressure Gauge 3.5 in Dial Npt Center Back

Product Description

The ASHCROFT 82142 is an analog pressure gauge designed for accurate pressure monitoring in mechanical and process systems. The gauge features a 3.5-inch dial with a pressure range of -30 to 300 Hg, making it suitable for both vacuum and positive pressure readings. Its stainless steel case provides durability in demanding service environments. Accuracy is rated at 1% of scale, which meets the requirements of most field service and mechanical room applications. The 1/4-inch NPT center back mount connection allows for direct panel or manifold installation. HVAC technicians, plumbers, and pipefitters commonly install this gauge during system commissioning, pressure testing, and ongoing monitoring work.

The ASHCROFT 82142 suits residential and commercial applications where a compact, dry analog gauge is needed on piping, manifolds, pressure vessels, or HVAC equipment. The center back mount orientation is well suited for panel-mounted installations where the face must be readable from the front of a control panel or equipment enclosure. The -30 to 300 Hg pressure range covers vacuum conditions as well as elevated system pressures common in hydronic heating, refrigeration piping, and compressed air systems. The gauge ships individually and is not liquid-filled, which keeps weight low and simplifies installation in vibration-free environments.

Key Features

• 3.5-inch analog dial for clear, at-a-glance pressure readings
• Pressure range of -30 to 300 Hg covers both vacuum and positive pressure service
• 1% of scale accuracy meets standard field service requirements
• Stainless steel case resists corrosion in mechanical and process environments
• 1/4-inch NPT center back mount connection for direct manifold or panel installation
• Dry (non-liquid-filled) design suited for low-vibration installations

Compatibility

Designed as an OEM-style replacement or service gauge for use on piping systems, manifolds, and mechanical equipment requiring a 1/4-inch NPT center back mount analog pressure gauge with a 3.5-inch dial.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or HVAC technician in accordance with applicable local mechanical codes. Depressurize and isolate the system before removing an existing gauge or threading the new gauge into the port. Apply thread sealant or PTFE tape to the NPT threads per standard practice, and avoid overtightening, which can crack the gauge socket. Because this gauge is not liquid-filled, it should be mounted in applications where significant vibration is not present, as vibration can reduce service life and accuracy.