Ashcroft 94581XLL Pressure Gauge 2.5 in 0-100 Psi Lower Mount

Product Description

The ASHCROFT 94581XLL is an analog pressure gauge designed for accurate pressure monitoring in plumbing, HVAC, and industrial service applications. It features a 2.5-inch dial with a 0 to 100 psi range and delivers 1 percent of scale accuracy. The stainless steel case provides corrosion resistance in demanding environments, while bronze wetted parts make it suitable for a broad range of fluid media. The lower-mount, 0.25-inch NPT connection allows direct installation into process lines or equipment ports. This is a dry-fill gauge with no liquid filler. Licensed plumbers, HVAC technicians, and pipefitters are the primary installers.

This gauge is suited for residential and light commercial applications where reliable pressure indication is required. Typical uses include monitoring supply pressure on water systems, boiler loops, compressed air lines, and hydronic heating circuits. The lower-mount configuration positions the dial face upward for easy in-line reading when the gauge is installed at the base of a riser or directly into a tee fitting. The compact 2.5-inch dial is readable in tight equipment rooms and mechanical spaces.

Key Features

• 0 to 100 psi pressure range suitable for water, air, and fluid service lines
• 1 percent of scale accuracy for reliable field readings
• 2.5-inch analog dial for clear, direct reading
• Stainless steel case resists corrosion in wet or humid environments
• Bronze wetted parts compatible with a wide range of media
• Dry gauge, no liquid filler — no risk of filler contamination or leakage
• Lower-mount 0.25-inch NPT connection for direct in-line installation

Compatibility

Designed as an OEM-style replacement or new-installation pressure gauge for residential and commercial plumbing, HVAC, and fluid-handling systems requiring a 0.25-inch NPT lower-mount connection and a 0 to 100 psi measurement range.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off and depressurize the system completely before removing or installing any gauge. Apply thread sealant tape or compound to the NPT threads per local plumbing code before threading the gauge into the fitting. Do not over-tighten; use a wrench on the hex body only and avoid applying torque through the case or dial.