Ashcroft 83191 Pressure Gauge 300 Psi 3.5 in Dial Npt

Product Description

The ASHCROFT 83191 is an analog pressure gauge designed for accurate pressure monitoring in mechanical, HVAC, plumbing, and industrial service applications. It features a 3.5-inch dial with a measurement range of 0 to 300 psi and delivers 1% of scale accuracy, making it suitable for applications where reliable pressure readings are critical. The stainless steel case provides corrosion resistance in demanding environments. Mounting is via a 1/4-inch NPT center back connection, allowing direct installation into pipework or panel-mounted assemblies. Licensed plumbers, HVAC technicians, and pipefitters commonly install this type of gauge during system commissioning and routine maintenance.

This gauge is appropriate for use in residential and commercial systems where a standard analog pressure gauge is required. Typical installation scenarios include boiler systems, compressed air lines, water supply systems, and HVAC refrigerant or fluid circuits requiring continuous pressure indication. The center back mount configuration suits panel and wall-mounted piping arrangements where face-forward visibility is needed. The dry, non-liquid-filled design keeps installation straightforward with no fluid handling required during fitting.

Key Features

• 0 to 300 psi pressure range for a wide variety of mechanical and HVAC system applications
• 1% of scale accuracy for reliable, repeatable pressure readings
• 3.5-inch analog dial for clear, easy-to-read indication at a distance
• Stainless steel case for corrosion resistance in harsh or wet environments
• 1/4-inch NPT center back mount for direct inline or panel installation
• Dry gauge construction — no liquid fill required

Compatibility

Designed as an OEM-style replacement or new-installation pressure gauge for systems requiring a 1/4-inch NPT center back mount analog gauge rated to 300 psi.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified HVAC technician in accordance with applicable local codes and ASME B40.100 gauge installation standards. Isolate and depressurize the system fully before removing any existing gauge or fitting the new gauge. Use thread sealant tape or compound rated for the system fluid and pressure range on all NPT connections. Do not over-tighten the NPT fitting, as this may damage the gauge socket or distort readings.