The Castair G151860U is a 1/8-inch NPT bottom-mount pressure gauge with a 1.5-inch dial face, reading 0 to 60 PSI. Priced at $11.01, this is the bottom-mount, low-range version of Cast Air's 1.5-inch gauge — the port exits from the base of the gauge housing for vertical installation off horizontal fittings.
Like the G151860B, this gauge is calibrated for low-pressure monitoring rather than tank or supply line pressure. The 0-60 PSI scale provides the resolution you need when monitoring regulated downstream pressure — whether that is a regulator set for air tools, a spray gun station, or a pneumatic control circuit. At 60 PSI full scale, a 5 PSI adjustment at the regulator is clearly visible on the dial rather than nearly imperceptible on a wide-range gauge.
Key Features
- 1/8 inch NPT connection — fits standard regulator gauge ports, manifold fittings, and small system taps
- Bottom-mount configuration — port exits from the base for upright installation off horizontal fittings
- 1.5-inch dial — compact gauge for confined spaces
- 0-60 PSI range — appropriate for regulated downstream pressure monitoring
- Genuine Cast Air component — matched replacement for Cast Air regulator and system installations
Technical Specifications
- Part Number: G151860U
- Connection: 1/8 inch NPT
- Mount: Bottom mount
- Dial Size: 1.5 inch
- Range: 0-60 PSI
Which Gauge Do You Need?
Cast Air's 1.5-inch gauge lineup covers four combinations of mount type and range: back-mount 0-160 PSI (G151816B), bottom-mount 0-160 PSI (G151816U), back-mount 0-60 PSI (G151860B), and bottom-mount 0-60 PSI (this gauge, G151860U). Choose the 0-60 PSI range for regulated low-pressure monitoring. Choose bottom-mount when your gauge port is horizontal and the gauge needs to stand upright. If in doubt, call us and describe your installation.
Applications
- Downstream regulator pressure monitoring for air tool stations
- Spray gun and paint booth regulator outlet gauges
- Low-pressure pneumatic system pressure indication
- Replacement gauge on Cast Air regulator assemblies
Why Buy From OEM Diagnostic Tools?
We have been supplying compressed air components since 2016. We stock genuine Cast Air gauges and can confirm the correct part before you order. Free shipping, full warranty, tech support at 866-217-0063.
Call 866-217-0063 for quick answers and help!



