Wika 4282918 Pressure Gauge 0-100 Psi 2.5 in Dial Lower Mount

Product Description

The WIKA 4282918 is a liquid-filled analog pressure gauge designed for accurate pressure monitoring in gas and liquid service applications. Filled with glycerine to dampen needle vibration and protect internal components, it features a 2.5-inch dial with a single-scale range of 0 to 100 psi and an accuracy rating of plus or minus 2.5 percent of scale. The stainless steel case and stainless steel wetted parts provide corrosion resistance in demanding service environments. A 1/4-inch NPT lower-mount connection allows direct inline or panel installation. HVAC technicians, plumbers, and industrial service professionals install this gauge to verify system pressure during commissioning, service, and diagnostics.

This gauge is suited for residential and light commercial applications where reliable pressure indication is required on gas or liquid systems. The glycerine fill makes it a strong choice for installations with pump-induced pulsation or mechanical vibration that would cause an unfilled gauge to read erratically. The lower-mount NPT configuration fits standard threaded ports on piping, manifolds, and pressure test assemblies commonly found in HVAC refrigerant circuits, hydronic heating systems, water supply lines, and pool and spa equipment.

Key Features

• Glycerine-filled case dampens vibration and pulsation for stable needle reading
• 0 to 100 psi single-scale range with analog dial display
• 2.5-inch dial diameter for clear readability in tight service locations
• Stainless steel case (304 grade) and stainless steel wetted parts for corrosion resistance
• 1/4-inch NPT lower-mount connection for standard inline installation
• Suitable for both gaseous and liquid media service

Compatibility

Designed as an OEM-style replacement or service gauge for gas and liquid pressure monitoring applications requiring a 1/4-inch NPT lower-mount fitting and a 0 to 100 psi range. WIKA model number 233.55.

Installation Notes

Installation is typically performed by a licensed plumber, HVAC technician, or qualified service professional. Isolate and depressurize the system completely before removing an existing gauge or installing this unit into a pressurized port. Apply an appropriate thread sealant to the NPT threads per local plumbing code requirements; do not overtighten, as stainless fittings are susceptible to galling. Confirm the pressure range of the system does not exceed 100 psi before commissioning.