Ashcroft 80300XLL Pressure Gauge 4.5 in Dial Center Back Mount

Product Description

The ASHCROFT 80300XLL is an analog pressure gauge designed for accurate pressure monitoring in mechanical and process systems. Featuring a 4.5-inch dial, this gauge delivers a wide 30 to 0 to 300 psi pressure range with 0.5% of scale accuracy. The aluminum case keeps the instrument lightweight, while bronze wetted parts provide solid resistance to corrosion in typical fluid and gas service. The center back mount configuration positions the gauge flush against panels or manifolds for clean, professional installations. This instrument is suited for HVAC, plumbing, and light industrial applications where reliable pressure indication is required by licensed technicians and service professionals.

This gauge is commonly installed in residential and commercial HVAC systems, hydronic heating circuits, compressed air lines, and general plumbing pressure monitoring points. The center back mount suits panel-mounted gauge assemblies and is compatible with standard 1/4-inch threaded connections found on most service ports, manifolds, and pressure taps in the trade. The no-fill, dry-dial design makes it appropriate for environments where liquid-filled gauges are not required or desired. Technicians use this gauge for both permanent installation and periodic pressure-testing setups.

Key Features

• 4.5-inch analog dial for clear, at-a-glance pressure readings
• Pressure range of 30 to 0 to 300 psi suits a wide variety of service applications
• 0.5% of scale accuracy for reliable, repeatable readings
• Aluminum case reduces overall weight without sacrificing durability
• Bronze wetted parts resist corrosion in water, air, and compatible fluid service
• Center back mount supports flush panel installation with a clean appearance
• Dry, no-fill design simplifies handling and disposal requirements

Compatibility

Designed as an OEM-style replacement or direct-install pressure gauge for systems using standard 1/4-inch center back mount connections in HVAC, plumbing, and light industrial applications.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Isolate and depressurize the system before removing or installing any pressure gauge. Apply appropriate thread sealant to the 1/4-inch male connection per the system manufacturer and applicable IPC or IFGC guidelines. Do not over-tighten the threaded connection, as this can damage the gauge socket or the mating fitting.