Wika 4252901 Pressure Gauge 0-30 Psi 2 in Dial Npt Lower

Product Description

The WIKA 4252901 is a commercial-grade analog pressure gauge designed for general-purpose pressure monitoring in HVAC, plumbing, and light industrial applications. It features a 2-inch diameter dial with a 0 to 30 psi range and a 1/4-inch NPT lower-mount connection. The case is constructed from ABS (Acrylonitrile Butadiene Styrene) for durability in typical service environments, while the wetted parts are brass for compatibility with a wide range of fluid media. The gauge operates without liquid fill and reads through a plastic lens. It is installed by HVAC technicians, plumbers, and general service technicians wherever low-range pressure monitoring is required.

This gauge is suited for residential and light commercial installations where a compact, no-fill pressure gauge is needed. Common applications include monitoring supply or return pressures on hydronic heating systems, water supply lines, compressed air circuits, and similar low-pressure systems. The lower-mount NPT connection makes panel mounting or direct pipe-tee installation straightforward in tight spaces where a bottom-entry connection is practical.

Key Features

• 2-inch dial diameter for easy reading in compact installations
• 0 to 30 psi pressure range suitable for low-pressure water and air circuits
• 1/4-inch NPT lower-mount connection for direct pipe or panel installation
• Brass wetted parts for broad fluid compatibility
• ABS case construction for lightweight durability
• No-fill design reduces maintenance and eliminates fluid-leak concerns
• 3-2-3 percent of scale accuracy across the full dial range

Compatibility

Designed as an OEM-style replacement or service addition for commercial pressure gauge applications requiring a 2-inch dial, 1/4-inch NPT lower-mount connection, and a 0 to 30 psi range. WIKA model reference 111.10.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable local codes and IPC guidelines. Shut off and depressurize the system completely before removing or installing any pressure gauge. Use appropriate thread sealant on the NPT connection and tighten by hand first before using a wrench to avoid overtightening the brass fitting. Do not exceed the rated pressure range of the gauge.