Ashcroft 86466 Pressure Gauge 0-400 Psi 8.5 in Dial Lower Npt

Product Description

The ASHCROFT 86466 is an analog pressure gauge designed for accurate pressure measurement in industrial, commercial, and mechanical systems. It features an 8.5-inch aluminum case dial with a measurement range of 0 to 400 psi and a glass lens for clear readability. The gauge uses a bronze Bourdon tube internally and connects via a 0.25-inch NPT lower-mount fitting. Accuracy is rated at 0.25 percent of scale, making it suitable for applications where reliable pressure readings are critical. Licensed HVAC technicians, plumbers, and pipefitters commonly specify this gauge for high-visibility panel and pipe installations.

This gauge is well suited for use in commercial HVAC systems, plumbing distribution lines, compressed air systems, and industrial process piping where a large-dial, lower-mount configuration is required. The 8.5-inch dial size allows easy reading at a distance, making it a practical choice for equipment rooms, boiler rooms, and mechanical skids. The lower-mount NPT connection simplifies installation on vertical pipe runs and manifold blocks.

Key Features

• 8.5-inch aluminum case dial for high-visibility pressure reading
• 0 to 400 psi range with 0.25 percent of scale accuracy
• Bronze Bourdon tube construction for reliable pressure sensing
• 0.25-inch NPT lower-mount connection for vertical pipe installation
• Glass lens for clear, durable dial protection
• CRN certified for use in applicable jurisdictions

Compatibility

Designed as a direct-fit analog pressure gauge for systems requiring a lower-mount, 0.25-inch NPT connection with an 8.5-inch dial and a 0 to 400 psi measurement range. Verify system pressure range and connection size before installation.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified HVAC technician in accordance with applicable local mechanical codes. Shut off and depressurize the system fully before removing or installing any pressure gauge. Use appropriate thread sealant on NPT connections and avoid overtightening, which can damage the gauge body or fitting. Confirm the system operating pressure falls within the 0 to 400 psi rated range before commissioning.