Ashcroft 662876002658 Pressure Gauge 0-100 Psi 3.5 in

Product Description

The ASHCROFT 662876002658 is a commercial analog pressure gauge designed for monitoring system pressure in HVAC, plumbing, and industrial piping applications. It features a 3.5-inch thermoplastic case with a polycarbonate lens and a bronze Bourdon tube movement. The gauge reads 0 to 100 psi with a 3-2-3 percent of scale accuracy rating and connects via a 0.25-inch lower-mount NPT fitting. Its dry, non-liquid-filled design keeps installation straightforward. Licensed HVAC technicians and plumbers install this gauge on equipment such as boilers, compressors, water lines, and refrigeration circuits where a clear, readable dial and reliable accuracy are required.

This gauge is suited for commercial and residential service work where a standard 3.5-inch analog gauge is specified. The lower-mount NPT connection makes it compatible with typical tee fittings and gauge ports found on boiler supply lines, pump discharge headers, air compressor tanks, and HVAC hydronic systems. It is a dry gauge and is not intended for applications requiring dampening of pressure spikes, where a liquid-filled gauge would be the appropriate choice. The black dial and analog readout provide clear visibility in mechanical room installations.

Key Features

• 3.5-inch dial diameter for clear, at-a-distance readings in mechanical rooms
• 0 to 100 psi range with 3-2-3 percent of scale accuracy
• Bronze Bourdon tube for durability in standard water and air pressure service
• Thermoplastic case with polycarbonate lens resists impact and corrosion
• 0.25-inch lower-mount NPT connection fits standard gauge ports and tee fittings
• Certified to CRN, UL252, and UL404 standards

Compatibility

Designed as an OEM-style replacement or direct-install commercial pressure gauge for residential and light commercial HVAC, plumbing, and compressed air systems requiring a 0.25-inch lower-mount NPT gauge port and a 0 to 100 psi measurement range.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified mechanic in accordance with local codes and applicable ASME and IFGC requirements. Shut down and depressurize the system completely before removing or installing any gauge. Apply thread sealant tape or pipe dope to the NPT threads and tighten to snug with an appropriate wrench — do not overtighten the thermoplastic case. Verify system pressure is within the 0 to 100 psi operating range before returning the system to service.