Ashcroft 451279S02LXLL5K Pressure Gauge 4.5 in 5000 Psi

Product Description

The ASHCROFT 451279S02LXLL5K is an analog pressure gauge designed for accurate pressure monitoring in industrial, mechanical, and process systems. It features a 4.5-inch dial for clear readability and covers a pressure range of 0 to 5000 psi with an accuracy of 0.5 percent of scale. The thermoplastic case provides resistance to corrosion and impact in demanding environments. Mounted from the lower connection, it fits standard panel and pipe installations. This gauge ships dry — no liquid fill — making it straightforward to install and service. Licensed plumbers, HVAC technicians, and mechanical contractors typically specify this type of gauge for high-pressure applications.

This gauge is suited for residential and commercial applications where reliable pressure indication is required on water, air, gas, or hydraulic circuits operating up to 5000 psi. The lower-mount configuration positions the 1/4-inch threaded connection at the base of the gauge, allowing direct installation into piping or manifold taps without additional fittings in most standard setups. The 4.5-inch dial diameter makes it well-suited for panel mounting where at-a-glance pressure readings are needed from a short distance.

Key Features

• 4.5-inch analog dial for clear at-a-distance pressure readings
• 0 to 5000 psi pressure range covers high-pressure service applications
• 0.5 percent of scale accuracy for reliable process monitoring
• Lower-mount configuration with 1/4-inch threaded connection
• Thermoplastic case resists corrosion without the added weight of metal housings
• Dry gauge — no liquid fill required, simplifying installation and disposal

Compatibility

Designed as an OEM-style replacement or direct-install pressure gauge for systems requiring a lower-mount, 1/4-inch threaded analog gauge with a 4.5-inch dial rated to 5000 psi.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or mechanical technician familiar with high-pressure systems. Always depressurize and isolate the line before removing an existing gauge or threading in a new one. Apply thread sealant or PTFE tape to the male threads per applicable IPC or ASME B31 guidelines — do not overtighten, as thermoplastic-bodied gauges can crack under excessive torque. Verify the system operating pressure does not exceed the gauge full-scale rating of 5000 psi.