The Castair G15115VP30 is a 1.5 HP single-stage electric garage air compressor with a 15-gallon v-port style tank, running on 115V single-phase power at 12 amps. It delivers 10.0 CFM free air delivery and 4.8 CFM at 100 PSI, and shuts off at 125 PSI. At 150 lbs shipped weight and 22" x 18" x 40" overall dimensions, this is a compact, light-duty shop compressor sized for a single bay garage, small body shop, or home workshop where 115V outlet power is the only option.
Who This Compressor Is For
The G15115VP30 fits shops that need a reliable compressor for intermittent use on a standard 115V household or light commercial circuit. The 12-amp draw stays within the capacity of a 15-amp breaker with some headroom. The 15-gallon tank provides enough stored volume for tire inflation, blowguns, impact drivers, and general-purpose air tools without constant pump cycling. This is not a high-demand production compressor — it is for shops where the air demand is moderate and outlet power is limited to 115V.
Key Specifications
- Model: G15115VP30
- Motor: 1.5 HP
- Stage: Single
- Tank Capacity: 15 gallons, v-port style
- Pump RPM: 1,200
- Free Air Delivery (0 PSI): 10.0 CFM
- Delivery at 100 PSI: 4.8 CFM
- Cutout Pressure: 125 PSI (factory set, single-stage)
- Voltage / Amperage: 115V / 12 amps
- Dimensions (L x W x H): 22" x 18" x 40"
- Shipped Weight: 150 lbs
- Motor Type: 1-phase, 3,450 RPM motor with overload protection
- Starter: No magnetic starter required
Pump and Unit Features
- Slow-running belt-driven pump: Pump runs at 1,200 RPM — significantly slower than direct-drive pumps — for quieter operation and longer pump life
- Oil-lubricated cast iron pump: Cast iron construction throughout; oil-lubricated for durability and repairability
- Automotive-type intake filter: Paper element filter silences intake noise and removes particulates from incoming air
- Easy-read oil sight glass: Check oil level at a glance without removing the fill cap
- Powder-coated ASME tank: Factory powder-coated for corrosion resistance; ASME-rated for safety compliance
- Copper discharge and unloader tube: Stronger than steel tube at this application; increases heat dissipation from the discharge line
- Bleeder pressure switch: Load-less start — the pump starts unloaded every time, reducing motor stress
- Overload protection: Built-in motor overload protection; no magnetic starter required
- Four feet on stationary base: Stable four-point mounting on all stationary models
- Rigid metal belt guard: Protects the belt and pulley from contact and debris
Garage Series Lineup — Choosing the Right Model
Castair's Garage Series covers three models for single-phase electric operation:
- 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
- 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
- G15115VP30 is the right choice if: you only have 115V power available, your air demand is low (tire service, occasional impact use, blow-off), and you need a compact footprint
- Step up to G212P50 if: you need 6.5 CFM at 100 PSI for more sustained tool use, or you need the portability of the 20-gallon model
- Step up to G3516VS75 if: you have 230V available and your demand justifies 11.5 CFM at 100 PSI — this is the serious shop unit in the Garage Series
- Consider the Commercial Series (C513HA8 and up, starting at 5 HP, 230V) if you run air tools continuously throughout the day
The G15115VP30's 4.8 CFM at 100 PSI is honest output for a 1.5 HP single-stage on 115V. Do not try to run high-demand air tools — spray guns with 8-12 CFM requirements, heavy-duty air ratchets — continuously from this unit. It is correctly sized for intermittent use.
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 can get a reliable, repairable, cast-iron unit without going through big-box channels. Free shipping on qualifying orders, free tech support at 866-217-0063, and full manufacturer warranty. Call us if you need help selecting the right compressor for your shop's air demand and power supply.
Call 866-217-0063 for quick answers and help!
