Product Overview

The American Granby PO-30 is a bottom-mount vacuum gauge for observing suction conditions in compatible pool, filter, and service equipment. Its 0-30 HG scale can help a technician compare current readings with normal system behavior, identify a changing filter condition, or investigate restricted flow and suction-side performance. It is also a practical replacement when an existing pool-equipment gauge becomes damaged or difficult to read.

The gauge uses a 2 in. face and a standard 1/4 in. NPT brass fitting. Before ordering, confirm that the equipment requires a vacuum gauge rather than a pressure gauge, that the scale is appropriate, and that the bottom connection and available clearance match the installation.

Key Features:

• 0-30 HG vacuum range
• 2 in. gauge face
• Bottom-mount configuration
• 1/4 in. NPT brass connection
• Designed for compatible pool-equipment service

Common Uses:

• Pool filter monitoring
• Suction-side troubleshooting
• Vacuum checks during equipment service
• Replacement of a worn gauge

Technical Specifications:

• Gauge Size: 2 in.
• Range: 0-30 HG
• Connection: 1/4 in. NPT brass fitting
• Mount: Bottom

Installation Notes:

Depressurize the equipment before replacement. Use suitable thread sealing and install without twisting or stressing the gauge case.

FAQ:

Does this gauge measure pressure?
It is identified as a vacuum gauge with a 0-30 HG scale.

What connection does it use?
A 1/4 in. NPT brass fitting.

Why Buy From Big Frog Supply?

Big Frog Supply provides clear product information, helpful support, and convenient online ordering for pool-equipment service parts.