Wika 9318178 Pressure Gauge 0-100 Psi 2.5 in Dial Back Mount

Product Description

The WIKA 9318178 is a glycerine-filled industrial pressure gauge designed for continuous pressure monitoring in demanding fluid and gas systems. It features a 2.5-inch analog dial with a 0 to 100 psi range and delivers 1.5% of scale accuracy. The brass case and copper alloy wetted parts provide solid corrosion resistance in typical water, oil, and compatible refrigerant service applications. A 1/4-inch NPT back-mount connection simplifies installation on pipes, manifolds, and equipment panels. Licensed HVAC technicians, plumbers, and industrial maintenance personnel regularly use this gauge for system diagnostics and pressure verification tasks.

This gauge is suited for residential and light commercial applications where a compact, reliable pressure-reading instrument is required. Common install scenarios include boiler systems, compressed air lines, hydraulic circuits, chiller and refrigeration secondary loops, and plumbing service panels. The glycerine fill dampens needle vibration caused by pressure pulsation, making it appropriate for pump discharge points and reciprocating compressor outlets where fluctuating pressures are common. The back-mount configuration is especially practical in panel-mount or pipe-stub installations where front or lower connections are not accessible.

Key Features

• Glycerine liquid fill dampens needle vibration and protects internal movement from pulsation and shock
• 2.5-inch analog dial provides clear, at-a-glance pressure readings
• 1.5% of scale accuracy supports reliable diagnostic and commissioning use
• Brass case with copper alloy wetted parts resists corrosion in water, oil, and compatible fluid service
• 1/4-inch NPT back-mount thread fits standard pipe and manifold connections
• Acrylic lens protects dial face while maintaining readability

Compatibility

Designed as an OEM-style replacement or direct-install industrial pressure gauge for systems using 1/4-inch NPT back-mount connections with a 0 to 100 psi operating range.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified mechanical tradesperson. Depressurize and isolate the system fully before removing an existing gauge or installing this unit. Apply thread sealant or PTFE tape to the NPT threads per standard practice, and tighten to the fitting by hand before using a wrench on the hex of the gauge body — never use the dial case as a wrench grip. Verify that the system fluid and pressure range are compatible with copper alloy wetted parts before placing the gauge in service.