Wika 4253027 Pressure Gauge 0-30 Psi 2.5 in Dial Npt Lower

Product Description

The WIKA 4253027 is a commercial-grade analog pressure gauge designed for general-purpose pressure monitoring in plumbing, HVAC, and light industrial systems. It features a 2.5-inch dial with a 0 to 30 psi range and a 1/4-inch NPT lower-mount connection, making it straightforward to install inline or on a port fitting. The ABS case houses brass wetted parts, offering corrosion resistance in common water and air service applications. Accuracy is rated at 3-2-3 percent of scale, which meets standard commercial requirements. The plastic lens keeps weight low at 0.2 pounds. Plumbers, HVAC technicians, and mechanical contractors routinely use this gauge for system commissioning and ongoing pressure verification.

This gauge is suited for residential and light commercial applications where a compact, no-fill dial gauge is needed. Typical installations include domestic water systems, compressed air lines, hydronic heating circuits, and pool or spa equipment plumbing. The lower-mount NPT connection allows direct port mounting on pipes, manifolds, tees, and pressure taps without additional fittings in most cases. The single-scale analog dial provides a clear, at-a-glance pressure reading without requiring power or instrumentation.

Key Features

• 0 to 30 psi pressure range on a single analog scale
• 2.5-inch dial diameter for easy reading at close range
• 1/4-inch NPT lower-mount connection for direct port installation
• Brass wetted parts for compatibility with water and air service
• ABS case with plastic lens — lightweight at 0.2 pounds
• 3-2-3 percent of scale accuracy meets commercial gauge standards
• Dry, no-fill design — no liquid fill to manage or contain

Compatibility

Designed as a standard commercial replacement or new-installation pressure gauge for systems with 1/4-inch NPT lower-mount ports operating within a 0 to 30 psi range.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off system pressure and bleed the line before removing or installing any gauge. Apply thread sealant or PTFE tape to the NPT threads per local plumbing code — hand-tighten first, then wrench-tighten with care to avoid cracking the ABS case. Do not over-torque the connection or use the gauge body as a lever point.