Ashcroft 83228 Pressure Gauge 3.5 in Dial Npt Lower Mount

Product Description

The ASHCROFT 83228 is a liquid-filled analog pressure gauge designed for accurate pressure monitoring in HVAC, plumbing, and industrial service applications. It features a 3.5-inch dial with a pressure range of -30 to 150 psi and delivers 1% of scale accuracy. The stainless steel case provides corrosion resistance in demanding environments. The liquid-filled design dampens needle vibration, making readings easier to take on systems with pulsating pressure. The 1/4-inch NPT lower mount connection allows direct installation into standard pipe fittings. Licensed mechanical, HVAC, and plumbing technicians regularly use this gauge for system diagnostics, commissioning, and maintenance tasks.

This gauge suits residential and light commercial applications where reliable pressure readings are required. Common install scenarios include boiler systems, chilled water loops, compressed air lines, refrigeration manifolds, and hydronic heating and cooling systems. The lower mount orientation positions the dial face upward or outward for easy reading once the gauge is installed inline or on a manifold. The liquid fill helps stabilize the pointer under fluctuating or pulsating system pressures, reducing wear on internal movement components over time.

Key Features

• 3.5-inch analog dial for clear, at-a-glance pressure readings
• Pressure range of -30 to 150 psi covers vacuum and positive pressure service
• 1% of scale accuracy for reliable diagnostic and commissioning use
• Liquid-filled design dampens pointer vibration on pulsating systems
• Stainless steel case resists corrosion in wet or outdoor environments
• 1/4-inch NPT lower mount connection fits standard pipe and manifold ports

Compatibility

Designed as an OEM-style replacement or direct-install gauge for residential and light commercial systems using 1/4-inch NPT lower mount gauge connections, including boiler, hydronic, HVAC, and compressed air applications.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or pipefitter. Shut down and depressurize the system fully before removing an existing gauge or threading in this unit. Apply thread sealant tape or paste rated for the service fluid and pressure range to the NPT threads before installation. Follow applicable local codes and standards, including IPC and IFGC guidelines, when installing gauges on gas or hydronic systems.