Ashcroft 80252XLL Pressure Gauge 4.5 in Dial 30-0-30 Psi

Product Description

The ASHCROFT 80252XLL is an analog pressure gauge designed for industrial and mechanical service applications where accurate pressure monitoring is required. The gauge features a 4.5-inch aluminum case dial, stainless steel wetted parts, and a rear flange mount configuration. It covers a compound pressure range of 30 to 0 to 30 psi, making it suitable for systems that require both vacuum and positive pressure readings. Accuracy is rated at 0.5% of scale. This gauge is installed by licensed plumbers, HVAC technicians, and mechanical contractors in process piping, HVAC systems, and utility mechanical rooms.

This gauge is well suited for residential and commercial mechanical applications where a rear flange mount is needed for panel or wall-mounted installations. The compound range supports use on systems where pressure can swing below atmospheric, such as suction lines, vacuum systems, or hydronic loops. The 0.5-inch thread connection provides a standard fitting interface. The gauge ships dry with no liquid fill, keeping it compatible with environments where fluid contamination or freezing of fill media is a concern.

Key Features

• Compound pressure range: 30 to 0 to 30 psi for vacuum and positive pressure monitoring
• 4.5-inch analog dial for easy reading at distance
• Stainless steel wetted parts for corrosion resistance in demanding service
• Aluminum case construction reduces overall weight
• Rear flange mount for secure panel or surface mounting
• No liquid fill — avoids freeze damage and fill fluid contamination concerns
• 0.5% of scale accuracy for reliable readings

Compatibility

Designed as an OEM-style replacement or direct installation gauge for mechanical piping systems requiring a rear flange mount, 0.5-inch threaded connection, and 4.5-inch dial in compound psi service.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or industrial pipefitter. Isolate and depressurize the system fully before removing any existing gauge or fittings. Apply appropriate thread sealant to the male threads per local plumbing code requirements — do not overtighten, as this can damage the gauge socket. Verify the flange mounting surface is flat and secure before final tightening.