The Castair G212P50 is a 2 HP single-stage portable electric air compressor with a 20-gallon tank. It runs on 115V single-phase at 15 amps, delivers 10.4 CFM free air delivery and 6.5 CFM at 100 PSI, and shuts off at 125 PSI. The portable design, 115V operation, and 175-lb shipped weight put this in the category of compressors that go where the work is — large service bays, mobile shops, or any location where you need more air than a small portable can provide but still need to run on standard outlet power. Factory-mounted regulator with gauge and quick coupler are included.
Who This Compressor Is For
The G212P50 is the working shop's portable unit. It delivers more CFM than the G15115VP30 (6.5 vs. 4.8 at 100 PSI) while still running on 115V — which matters when you need to move the compressor to a location where 230V is not available. The 20-gallon tank provides adequate stored volume for tire service, impact work, and general pneumatic tools without constant pump cycling. The factory-installed regulator, gauge, and quick coupler mean you can run tools immediately without adding fittings.
Key Specifications
- Model: G212P50
- Motor: 2 HP
- Stage: Single
- Tank Capacity: 20 gallons, portable style
- Pump RPM: 1,380
- Free Air Delivery (0 PSI): 10.4 CFM
- Delivery at 100 PSI: 6.5 CFM
- Cutout Pressure: 125 PSI (factory set, single-stage)
- Voltage / Amperage: 115V / 15 amps
- Dimensions (L x W x H): 33" x 19" x 30"
- Shipped Weight: 175 lbs
- Motor Type: 1-phase, 3,450 RPM motor with overload protection
- Starter: No magnetic starter required
- Included: Factory-mounted regulator with gauge and quick coupler
Pump and Unit Features
- Belt-driven, oil-lubricated cast iron pump: Runs at 1,380 RPM for quiet, long-life operation versus direct-drive alternatives
- Automotive-type paper element intake filter: Filters incoming air and quiets intake noise
- Easy-read oil sight glass: Check oil level without removing the fill cap
- Powder-coated ASME tank: Corrosion-resistant finish; ASME-rated tank construction
- Copper discharge and unloader tube: Stronger than steel; better heat dissipation from the discharge line
- Bleeder pressure switch: Unloaded start reduces motor stress every time the compressor kicks on
- Overload protection: Built-in motor overload; no magnetic starter required
- Factory-mounted regulator, gauge, and quick coupler: Ready to use out of the box
- Portable design: Built for movement between work areas
Garage Series Lineup
- G15115VP30 — 1.5 HP, 15-gal v-port, 115V/12A, 4.8 CFM @ 100 PSI, 150 lbs shipped
- G212P50 — 2 HP, 20-gal portable, 115V/15A, 6.5 CFM @ 100 PSI, 175 lbs shipped (this model)
- G3516VS75 — 3.5 HP, 60-gal vertical, 230V/15A, 11.5 CFM @ 100 PSI, 250 lbs shipped
When Does a Shop Need This vs. Stepping Up or Down
- G212P50 is the right choice if: you need portability, 115V operation, and more sustained output than the G15115VP30 (6.5 vs. 4.8 CFM at 100 PSI)
- Step down to G15115VP30 if: portability is not required, you have a fixed install location, and 4.8 CFM at 100 PSI covers your demand at lower cost
- Step up to G3516VS75 if: you have 230V available and need 11.5 CFM at 100 PSI for heavier continuous tool use — the 230V requirement is a real constraint, but the performance jump is significant
- The G212P50 runs on a 15-amp, 115V circuit — confirm your outlet and extension cord (if used) are rated for 15A continuous. A 15A breaker tripping repeatedly means you need 230V or a smaller tool load.
Factory-Mounted Options Available
- Air Operated Auto Drain: #ADVSM
- Auto Drain: #SDV03M
- Belt Guard Aftercooler: #BGAC1M
- Right From the Start Kit: #RFS001
- Vibration Pads 4x4x1" (set of 4): #VP1004
Why Buy From OEM Diagnostic Tools?
OEM Diagnostic Tools has supplied professional shop equipment and components since 2016. We carry Castair compressors so shops get a durable, repairable, cast-iron unit without the big-box alternative. Free shipping on qualifying orders, free tech support at 866-217-0063, and full manufacturer warranty. Call us if you need help comparing the G212P50 against other models for your specific air demand and shop setup.
Call 866-217-0063 for quick answers and help!
