Ashcroft 81379XLL Pressure Gauge 2.5 in 30-0-150 Psi

Product Description

The ASHCROFT 81379XLL is an analog pressure gauge built for accurate pressure monitoring across a 30-0-150 psi compound range. The 2.5-inch dial provides a clear, readable display in the field. The stainless steel case offers durability in demanding environments, while the bronze wetted parts suit a wide range of fluid and gas applications. Accuracy is rated at 1 percent of full scale. The center back mount configuration allows direct panel or pipe installation with minimal projection. This gauge is installed by HVAC technicians, plumbers, and industrial service professionals who need reliable pressure indication at a system connection point.

This gauge is suited for use in residential and light commercial plumbing systems, HVAC hydronic systems, compressed air lines, and similar fluid or gas service applications. The center back mount design is commonly used where the gauge mounts flush to a panel or bracket. The 1/4-inch thread connection fits standard NPT fittings found throughout plumbing and HVAC piping systems. The compound range of 30-0-150 psi makes it appropriate for applications where both vacuum and positive pressure monitoring are required.

Key Features

• Compound pressure range: 30 in-Hg vacuum to 150 psi positive
• 2.5-inch analog dial for clear field readability
• 1 percent of full-scale accuracy
• Stainless steel case for corrosion resistance
• Bronze wetted parts compatible with common fluid and gas media
• Center back mount with 1/4-inch NPT thread connection
• Dry gauge, non-liquid-filled construction

Compatibility

Designed as an OEM-style replacement or new-install pressure gauge for residential and commercial plumbing, HVAC hydronic, and compressed air systems requiring a 1/4-inch center back mount analog gauge.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified service professionals. Shut off system pressure and depressurize the line completely before removing or installing any gauge. Use appropriate thread sealant tape or compound on the NPT threads and tighten to fitting manufacturer recommendations using a wrench on the gauge hex, not the dial case. Verify that the system pressure range does not exceed the gauge maximum rating during operation.