Ashcroft 94340 Pressure Gauge 200 Psi 3.5 in Dial Lower Mount

Product Description

The ASHCROFT 94340 is an analog pressure gauge built for trade and industrial service applications requiring accurate, readable pressure measurement. It features a 3.5-inch dial face with a measurement range of 0 to 200 psi and a 1 percent of scale accuracy rating. The stainless steel case offers corrosion resistance in demanding environments. Mounting is via a lower 1/4-inch NPT threaded connection, making it compatible with standard pipe fittings used across HVAC, plumbing, and mechanical systems. The gauge is dry (non-liquid-filled), keeping the design straightforward for general-purpose use. HVAC technicians, plumbers, and pipefitters regularly specify this type of gauge for pressure monitoring on system test points, manifolds, and service panels.

The ASHCROFT 94340 is suited for residential and light commercial applications where a reliable, easy-to-read panel or line-mounted pressure gauge is required. Common installations include boiler systems, air compressor lines, water supply lines, pump discharge lines, and HVAC refrigerant or hydronic system test ports. The lower mount NPT connection allows direct inline or panel installation using standard 1/4-inch NPT fittings widely available in plumbing and mechanical supply. No special adapters are required when the system uses standard NPT pipe threads.

Key Features

• 3.5-inch analog dial for clear, at-a-glance pressure readings
• 0 to 200 psi measurement range suitable for a wide range of system pressures
• 1 percent of scale accuracy for reliable pressure monitoring
• Stainless steel case resists corrosion in wet or chemically active environments
• Lower mount 1/4-inch NPT connection for direct inline or panel installation
• Dry (non-liquid-filled) construction for straightforward general-purpose service

Compatibility

Designed as a general-purpose analog pressure gauge for systems using standard 1/4-inch NPT lower-mount connections, including HVAC, plumbing, and mechanical piping applications.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or pipefitter. Always depressurize and isolate the system before removing or installing a pressure gauge. Apply an appropriate thread sealant or PTFE tape to the NPT threads before installation, and tighten to hand-tight plus a controlled turn using a wrench — avoid over-tightening, which can crack the gauge socket or distort threads. Verify the gauge range is appropriate for the system operating pressure before placing the system back in service.