Ashcroft 82135 Vacuum Gauge 3.5 in Dial 1/4 Npt Back Mount

Product Description

The ASHCROFT 82135 is an analog vacuum pressure gauge designed for measuring negative pressure in mechanical systems. It features a 3.5-inch dial for easy at-a-glance reading and a 1/4-inch NPT center back mount connection. The gauge covers a pressure range of 30 inches Hg to 0, making it suitable for vacuum measurement in HVAC, refrigeration, plumbing, and light industrial applications. Accuracy is rated at 1 percent of scale, and the stainless steel case provides durability in demanding service environments. This is a dry gauge with no liquid fill.

This gauge is commonly installed in residential and commercial HVAC systems, refrigeration lines, plumbing service setups, and vacuum pump monitoring applications. The center back mount configuration allows for panel or wall mounting where the process connection enters from the rear of the gauge body. It is installed by HVAC technicians, plumbers, and mechanical contractors who need a reliable vacuum indicator in a compact, readable format.

Key Features

• 3.5-inch analog dial for clear, readable vacuum measurements
• Pressure range: 30 inches Hg to 0 (full vacuum to atmospheric)
• 1/4-inch NPT center back mount connection for panel or wall installation
• Stainless steel case for corrosion resistance in harsh environments
• 1 percent of scale accuracy for reliable field readings
• Dry gauge construction with no liquid fill

Compatibility

Designed as an OEM-style replacement or direct-install vacuum gauge for mechanical systems requiring a 1/4-inch NPT center back mount connection and a 30 inches Hg to 0 pressure range.

Installation Notes

Installation is typically performed by a licensed HVAC technician, plumber, or qualified mechanical contractor. Before installing or replacing the gauge, isolate and depressurize the system completely. Use appropriate thread sealant on the NPT connection and avoid overtightening, which can damage the gauge body or fitting. Verify that the process pressure range does not exceed the gauge rating before bringing the system back online.