Ashcroft 94342 Pressure Gauge 400 Psi 3.5 in Lower Mount

Product Description

The ASHCROFT 94342 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 face calibrated from 0 to 400 psi, a lower-mount 1/4-inch NPT connection, and a stainless steel case for durability in demanding environments. The gauge delivers 1% of scale accuracy, making it suitable for applications where reliable pressure readings are critical. Licensed tradespeople use this gauge to monitor system pressures on pumps, compressors, boilers, and fluid handling systems. It ships as a single unit and requires no liquid fill.

The ASHCROFT 94342 is well suited for residential and light commercial HVAC, hydronic heating, refrigeration, and general plumbing service. Its lower-mount NPT connection allows direct installation into pipe tees, manifolds, or gauge ports without additional adapters in most standard configurations. The 3.5-inch dial provides clear readability in tight mechanical spaces. HVAC technicians, plumbers, and pipefitters commonly install this gauge during system commissioning, pressure testing, and ongoing monitoring of closed-loop and open-loop systems.

Key Features

• 0 to 400 psi pressure range with 1% of scale accuracy
• 3.5-inch analog dial for clear, at-a-glance pressure readings
• Lower-mount 1/4-inch NPT connection for direct pipe installation
• Stainless steel case for corrosion resistance in wet or harsh environments
• Dry (non-liquid-filled) design for standard-duty pressure monitoring

Compatibility

Designed as an OEM-style replacement or service gauge for systems using a standard 1/4-inch lower-mount NPT gauge port rated to 400 psi.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or pipefitters. Always depressurize and isolate the system before removing or installing a pressure gauge. Use thread sealant tape or pipe dope rated for the fluid type and pressure range on the NPT threads. Do not exceed the rated 400 psi maximum pressure, and verify gauge orientation matches the lower-mount configuration before tightening.