Ashcroft 451379S02LXLL3K Pressure Gauge 4.5 in 3000 Psi

Product Description

The ASHCROFT 451379S02LXLL3K is an analog pressure gauge built for trade and industrial service applications requiring accurate, reliable pressure readings up to 3000 psi. The gauge features a 4.5-inch dial for easy readability and a lower-mount, 1/4-inch threaded connection for direct installation into pipework, manifolds, or equipment panels. Wetted parts are stainless steel, making this gauge suitable for use with mildly corrosive media and high-pressure fluid systems. The aluminum case keeps overall weight at 2.5 pounds while providing durable housing. Accuracy is rated at 0.5 percent of scale. Licensed plumbers, HVAC technicians, and pipefitters typically install this gauge during system commissioning or as a replacement on existing pressure monitoring points.

This gauge is suited for residential and commercial plumbing systems, HVAC hydronic circuits, compressed air lines, and industrial process piping where pressures up to 3000 psi must be monitored. The dry, non-liquid-filled design simplifies installation in environments where ambient vibration is not a primary concern. The lower-mount configuration positions the connection at the 6 o-clock position on the gauge body, allowing panel-mount or direct pipe-thread installation with the dial face oriented upward for easy reading. The 4.5-inch dial size is a common specification for control panel and equipment-bay applications.

Key Features

• 4.5-inch analog dial for clear, at-a-distance pressure readings
• 0 to 3000 psi pressure range suitable for high-pressure fluid and gas systems
• Stainless steel wetted parts resist corrosion in demanding service environments
• 0.5 percent of scale accuracy for precise monitoring
• Aluminum case construction reduces weight without sacrificing protection
• Dry, no-fill design for straightforward installation where vibration is minimal
• Lower-mount, 1/4-inch threaded connection fits standard pipe fittings and manifold ports

Compatibility

Designed as an OEM-style replacement or new-installation pressure gauge for high-pressure plumbing, HVAC, compressed air, and industrial process systems using standard 1/4-inch NPT lower-mount gauge connections.

Installation Notes

Installation is typically performed by a licensed plumber, pipefitter, or HVAC technician. Shut off and depressurize the system completely before removing or installing any pressure gauge. Apply thread sealant tape or compound to the male threads per applicable plumbing codes such as the IPC or IFGC before threading the gauge into the port. Do not over-tighten the gauge body; use a wrench on the hex fitting only, not on the dial case.