Ashcroft 662876118960 Pressure Gauge 300 Psi Npt

Product Description

The ASHCROFT 662876118960 is an analog pressure gauge designed for monitoring system pressure in HVAC, plumbing, and industrial piping applications. It features a 3.5-inch dial for clear readability and a working range of 0 to 300 psi. The steel case provides durable protection in demanding service environments. It mounts via a 1/4-inch NPT center back connection, making it compatible with standard pipe tee fittings and manifold ports. Licensed HVAC technicians, plumbers, and pipefitters install this gauge as part of routine system instrumentation, pressure testing, and ongoing monitoring setups.

This gauge is suited for residential and light commercial applications where a compact, reliable analog pressure indicator is required. Typical installations include boiler systems, chilled water loops, compressed air lines, refrigerant-side manifolds where pressure-only reading is needed, and water supply piping. The 3.5-inch dial diameter makes it practical for panel-mount or direct pipe-mount installs where technicians need a quick visual pressure reference without electronic sensing equipment.

Key Features

• 0 to 300 psi pressure range suitable for a wide variety of HVAC and plumbing system pressures
• 3.5-inch analog dial for clear, at-a-glance pressure readings
• 1/4-inch NPT center back mount for straightforward inline or manifold installation
• Steel case construction for durability in mechanical room and field environments
• Compact form factor fits standard gauge ports and panel cutouts

Compatibility

Designed as an OEM-style replacement or new-install pressure gauge for systems equipped with 1/4-inch NPT gauge ports, including boilers, air compressors, water supply lines, and HVAC hydronic systems requiring analog pressure monitoring up to 300 psi.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or pipefitter following applicable local codes and ASME B40.100 gauge installation guidelines. Depressurize and isolate the system fully before removing an existing gauge or threading in the new one. Apply appropriate thread sealant to the NPT threads and hand-tighten before using a wrench to seat the connection — do not overtighten, as this can crack the gauge socket. Verify zero reading before returning the system to service pressure.