The Castair G201420B is a 1/4-inch NPT back-mount pressure gauge with a 2-inch dial face, reading 0 to 200 PSI. Priced at $11.86, this gauge moves up from the 1/8-inch NPT, 1.5-inch dial gauges to a larger, more readable format with a higher-pressure range — suitable for monitoring tank and supply pressures on higher-pressure compressor systems.
The 1/4-inch NPT connection is the most common gauge port size on shop compressor tanks, pressure switches, manifolds, and larger regulators. The 2-inch dial is noticeably more readable than the 1.5-inch format across a shop floor or in a compressor room — you can read it without getting close to the gauge. The 0-200 PSI range covers standard shop air systems running 90-150 PSI with headroom for higher-pressure applications.
Key Features
- 1/4 inch NPT connection — the most common gauge port thread size on shop compressor tanks and systems
- Back-mount configuration — port exits from the rear for panel mounting or flush installation
- 2-inch dial — larger, more readable face than the 1.5-inch gauges
- 0-200 PSI range — covers standard shop and industrial compressed air supply pressure with margin
- Genuine Cast Air replacement component — correct specification for Cast Air system applications
Technical Specifications
- Part Number: G201420B
- Connection: 1/4 inch NPT
- Mount: Back mount
- Dial Size: 2 inch
- Range: 0-200 PSI
Back Mount vs. Bottom Mount
Back mount (this gauge): the port enters from the rear of the housing. Install where the gauge mounts against a panel or bracket face with the dial visible from the front. Bottom mount (G201420U): port exits from the base, gauge stands upright off a horizontal fitting. Look at your gauge port orientation before ordering. The fitting is the same 1/4 inch NPT on both — only the mount direction differs.
Applications
- Compressor tank pressure gauge replacement on mid-size shop compressors
- Pressure switch line gauge for compressed air systems
- Panel-mounted supply pressure indicators
- Regulator inlet pressure monitoring on higher-flow systems
Why Buy From OEM Diagnostic Tools?
We have been supplying compressed air components since 2016. We stock the full Cast Air gauge lineup and can confirm the correct part for your application. Free shipping, full warranty, tech support at 866-217-0063.
Call 866-217-0063 for quick answers and help!
