Skip to content

Free Shipping on Most Orders

Orders over $300 ship free to the continental US. Threshold may vary by brand.

Expert Support

Talk to a specialist — not a call center.
+1 978-295-7538

30-Day Returns

Not the right machine? Return or exchange within 30 days, no hassle.

Authorized Dealer

30 pro brands sold direct. Full manufacturer warranties honored.

120-Gallon Air Compressors

120-gallon air compressors hold a large air reserve for high-demand shops running several tools at once. Two-stage simplex and duplex models, 5 to 15 HP, up to 175 PSI, in single-phase and three-phase.

Original price $25,624.00 - Original price $25,624.00
Original price
$25,624.00
$25,624.00 - $25,624.00
Current price $25,624.00

Mi-T-M AED-46315-120HM Air Compressor – 15.0 HP, 120-Gal Horizontal, 460V 3φ

Mi-T-M
In stock

AED-46315-120HM 15.0 HP Two-Stage Duplex Air Compressor The Mi-T-M AED-46315-120HM is a 120-gallon horizontal two-stage air compressor built for sh...

View full details
Original price $25,624.00 - Original price $25,624.00
Original price
$25,624.00
$25,624.00 - $25,624.00
Current price $25,624.00
Original price $25,764.00 - Original price $25,764.00
Original price
$25,764.00
$25,764.00 - $25,764.00
Current price $25,764.00

Mi-T-M AED-23315-120HM Air Compressor – 15.0 HP, 120-Gal Horizontal, 230V 3φ

Mi-T-M
In stock

AED-23315-120HM 15.0 HP Two-Stage Duplex Air Compressor The Mi-T-M AED-23315-120HM is a 120-gallon horizontal two-stage air compressor built for sh...

View full details
Original price $25,764.00 - Original price $25,764.00
Original price
$25,764.00
$25,764.00 - $25,764.00
Current price $25,764.00
Original price $27,110.00 - Original price $27,110.00
Original price
$27,110.00
$27,110.00 - $27,110.00
Current price $27,110.00

Mi-T-M AED-20315-120HM Air Compressor – 15.0 HP, 120-Gal Horizontal, 208V 3φ

Mi-T-M
In stock

AED-20315-120HM 15.0 HP Two-Stage Duplex Air Compressor The Mi-T-M AED-20315-120HM is a 120-gallon horizontal two-stage air compressor built for sh...

View full details
Original price $27,110.00 - Original price $27,110.00
Original price
$27,110.00
$27,110.00 - $27,110.00
Current price $27,110.00
Original price $21,265.00 - Original price $21,265.00
Original price
$21,265.00
$21,265.00 - $21,265.00
Current price $21,265.00

Mi-T-M ADD-46310-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 460V 3φ

Mi-T-M
In stock

ADD-46310-120HM 10.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ADD-46310-120HM is a 120-gallon horizontal two-stage air compressor built for sh...

View full details
Original price $21,265.00 - Original price $21,265.00
Original price
$21,265.00
$21,265.00 - $21,265.00
Current price $21,265.00
Original price $21,265.00 - Original price $21,265.00
Original price
$21,265.00
$21,265.00 - $21,265.00
Current price $21,265.00

Mi-T-M ADD-23310-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 230V 3φ

Mi-T-M
In stock

ADD-23310-120HM 10.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ADD-23310-120HM is a 120-gallon horizontal two-stage air compressor built for sh...

View full details
Original price $21,265.00 - Original price $21,265.00
Original price
$21,265.00
$21,265.00 - $21,265.00
Current price $21,265.00
Original price $22,152.00 - Original price $22,152.00
Original price
$22,152.00
$22,152.00 - $22,152.00
Current price $22,152.00

Mi-T-M ADD-20310-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 208V 3φ

Mi-T-M
In stock

ADD-20310-120HM 10.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ADD-20310-120HM is a 120-gallon horizontal two-stage air compressor built for sh...

View full details
Original price $22,152.00 - Original price $22,152.00
Original price
$22,152.00
$22,152.00 - $22,152.00
Current price $22,152.00
Original price $24,378.00 - Original price $24,378.00
Original price
$24,378.00
$24,378.00 - $24,378.00
Current price $24,378.00

Mi-T-M ADD-23110-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 230V 1φ

Mi-T-M
In stock

ADD-23110-120HM 10.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ADD-23110-120HM is a 120-gallon horizontal two-stage air compressor built for sh...

View full details
Original price $24,378.00 - Original price $24,378.00
Original price
$24,378.00
$24,378.00 - $24,378.00
Current price $24,378.00
Original price $15,818.00 - Original price $15,818.00
Original price
$15,818.00
$15,818.00 - $15,818.00
Current price $15,818.00

Mi-T-M ACD-46375-120HM Air Compressor – 7.5 HP, 120-Gal Horizontal, 460V 3φ

Mi-T-M
In stock

ACD-46375-120HM 7.5 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-46375-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $15,818.00 - Original price $15,818.00
Original price
$15,818.00
$15,818.00 - $15,818.00
Current price $15,818.00
Original price $15,725.00 - Original price $15,725.00
Original price
$15,725.00
$15,725.00 - $15,725.00
Current price $15,725.00

Mi-T-M ACD-23375-120HM Air Compressor – 7.5 HP, 120-Gal Horizontal, 230V 3φ

Mi-T-M
In stock

ACD-23375-120HM 7.5 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-23375-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $15,725.00 - Original price $15,725.00
Original price
$15,725.00
$15,725.00 - $15,725.00
Current price $15,725.00
Original price $16,230.00 - Original price $16,230.00
Original price
$16,230.00
$16,230.00 - $16,230.00
Current price $16,230.00

Mi-T-M ACD-20375-120HM Air Compressor – 7.5 HP, 120-Gal Horizontal, 208V 3φ

Mi-T-M
In stock

ACD-20375-120HM 7.5 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-20375-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $16,230.00 - Original price $16,230.00
Original price
$16,230.00
$16,230.00 - $16,230.00
Current price $16,230.00
Original price $15,504.00 - Original price $15,504.00
Original price
$15,504.00
$15,504.00 - $15,504.00
Current price $15,504.00

Mi-T-M ACD-23175-120HM Air Compressor – 7.5 HP, 120-Gal Horizontal, 230V 1φ

Mi-T-M
In stock

ACD-23175-120HM 7.5 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-23175-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $15,504.00 - Original price $15,504.00
Original price
$15,504.00
$15,504.00 - $15,504.00
Current price $15,504.00
Original price $15,602.00 - Original price $15,602.00
Original price
$15,602.00
$15,602.00 - $15,602.00
Current price $15,602.00

Mi-T-M ACD-46305-120HM Air Compressor – 5.0 HP, 120-Gal Horizontal, 460V 3φ

Mi-T-M
In stock

ACD-46305-120HM 5.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-46305-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $15,602.00 - Original price $15,602.00
Original price
$15,602.00
$15,602.00 - $15,602.00
Current price $15,602.00
Original price $15,409.00 - Original price $15,409.00
Original price
$15,409.00
$15,409.00 - $15,409.00
Current price $15,409.00

Mi-T-M ACD-23305-120HM Air Compressor – 5.0 HP, 120-Gal Horizontal, 230V 3φ

Mi-T-M
In stock

ACD-23305-120HM 5.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-23305-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $15,409.00 - Original price $15,409.00
Original price
$15,409.00
$15,409.00 - $15,409.00
Current price $15,409.00
Original price $15,421.00 - Original price $15,421.00
Original price
$15,421.00
$15,421.00 - $15,421.00
Current price $15,421.00

Mi-T-M ACD-20305-120HM Air Compressor – 5.0 HP, 120-Gal Horizontal, 208V 3φ

Mi-T-M
In stock

ACD-20305-120HM 5.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-20305-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $15,421.00 - Original price $15,421.00
Original price
$15,421.00
$15,421.00 - $15,421.00
Current price $15,421.00
Original price $15,220.00 - Original price $15,220.00
Original price
$15,220.00
$15,220.00 - $15,220.00
Current price $15,220.00

Mi-T-M ACD-23105-120HM Air Compressor – 5.0 HP, 120-Gal Horizontal, 230V 1φ

Mi-T-M
In stock

ACD-23105-120HM 5.0 HP Two-Stage Duplex Air Compressor The Mi-T-M ACD-23105-120HM is a 120-gallon horizontal two-stage air compressor built for sho...

View full details
Original price $15,220.00 - Original price $15,220.00
Original price
$15,220.00
$15,220.00 - $15,220.00
Current price $15,220.00
Original price $14,668.00 - Original price $14,668.00
Original price
$14,668.00
$14,668.00 - $14,668.00
Current price $14,668.00

Mi-T-M AES-46315-120HM Air Compressor – 15.0 HP, 120-Gal Horizontal, 460V 3φ

Mi-T-M
In stock

AES-46315-120HM 15.0 HP Two-Stage Simplex Air Compressor The Mi-T-M AES-46315-120HM is a 120-gallon horizontal two-stage air compressor built for s...

View full details
Original price $14,668.00 - Original price $14,668.00
Original price
$14,668.00
$14,668.00 - $14,668.00
Current price $14,668.00
Original price $14,966.00 - Original price $14,966.00
Original price
$14,966.00
$14,966.00 - $14,966.00
Current price $14,966.00

Mi-T-M AES-20315-120HM Air Compressor – 15.0 HP, 120-Gal Horizontal, 208V 3φ

Mi-T-M
In stock

AES-20315-120HM 15.0 HP Two-Stage Simplex Air Compressor The Mi-T-M AES-20315-120HM is a 120-gallon horizontal two-stage air compressor built for s...

View full details
Original price $14,966.00 - Original price $14,966.00
Original price
$14,966.00
$14,966.00 - $14,966.00
Current price $14,966.00
Original price $12,140.00 - Original price $12,140.00
Original price
$12,140.00
$12,140.00 - $12,140.00
Current price $12,140.00

Mi-T-M ADS-46310-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 460V 3φ

Mi-T-M
In stock

ADS-46310-120HM 10.0 HP Two-Stage Simplex Air Compressor The Mi-T-M ADS-46310-120HM is a 120-gallon horizontal two-stage air compressor built for s...

View full details
Original price $12,140.00 - Original price $12,140.00
Original price
$12,140.00
$12,140.00 - $12,140.00
Current price $12,140.00
Original price $12,202.00 - Original price $12,202.00
Original price
$12,202.00
$12,202.00 - $12,202.00
Current price $12,202.00

Mi-T-M ADS-23310-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 230V 3φ

Mi-T-M
In stock

ADS-23310-120HM 10.0 HP Two-Stage Simplex Air Compressor The Mi-T-M ADS-23310-120HM is a 120-gallon horizontal two-stage air compressor built for s...

View full details
Original price $12,202.00 - Original price $12,202.00
Original price
$12,202.00
$12,202.00 - $12,202.00
Current price $12,202.00
Original price $12,419.00 - Original price $12,419.00
Original price
$12,419.00
$12,419.00 - $12,419.00
Current price $12,419.00

Mi-T-M ADS-20310-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 208V 3φ

Mi-T-M
In stock

ADS-20310-120HM 10.0 HP Two-Stage Simplex Air Compressor The Mi-T-M ADS-20310-120HM is a 120-gallon horizontal two-stage air compressor built for s...

View full details
Original price $12,419.00 - Original price $12,419.00
Original price
$12,419.00
$12,419.00 - $12,419.00
Current price $12,419.00
Original price $13,492.00 - Original price $13,492.00
Original price
$13,492.00
$13,492.00 - $13,492.00
Current price $13,492.00

Mi-T-M ADS-23110-120HM Air Compressor – 10.0 HP, 120-Gal Horizontal, 230V 1φ

Mi-T-M
In stock

ADS-23110-120HM 10.0 HP Two-Stage Simplex Air Compressor The Mi-T-M ADS-23110-120HM is a 120-gallon horizontal two-stage air compressor built for s...

View full details
Original price $13,492.00 - Original price $13,492.00
Original price
$13,492.00
$13,492.00 - $13,492.00
Current price $13,492.00
Original price $22,092.00 - Original price $22,092.00
Original price
$22,092.00
$22,092.00 - $22,092.00
Current price $22,092.00

Mi-T-M AED-46315-120H Air Compressor – 15.0 HP, 120-Gal Horizontal, 460V 3φ

Mi-T-M
In stock

AED-46315-120H 15.0 HP Two-Stage Duplex Air Compressor The Mi-T-M AED-46315-120H is a 120-gallon horizontal two-stage air compressor built for shop...

View full details
Original price $22,092.00 - Original price $22,092.00
Original price
$22,092.00
$22,092.00 - $22,092.00
Current price $22,092.00
Original price $22,212.00 - Original price $22,212.00
Original price
$22,212.00
$22,212.00 - $22,212.00
Current price $22,212.00

Mi-T-M AED-23315-120H Air Compressor – 15.0 HP, 120-Gal Horizontal, 230V 3φ

Mi-T-M
In stock

AED-23315-120H 15.0 HP Two-Stage Duplex Air Compressor The Mi-T-M AED-23315-120H is a 120-gallon horizontal two-stage air compressor built for shop...

View full details
Original price $22,212.00 - Original price $22,212.00
Original price
$22,212.00
$22,212.00 - $22,212.00
Current price $22,212.00
Original price $23,422.00 - Original price $23,422.00
Original price
$23,422.00
$23,422.00 - $23,422.00
Current price $23,422.00

Mi-T-M AED-20315-120H Air Compressor – 15.0 HP, 120-Gal Horizontal, 208V 3φ

Mi-T-M
In stock

AED-20315-120H 15.0 HP Two-Stage Duplex Air Compressor The Mi-T-M AED-20315-120H is a 120-gallon horizontal two-stage air compressor built for shop...

View full details
Original price $23,422.00 - Original price $23,422.00
Original price
$23,422.00
$23,422.00 - $23,422.00
Current price $23,422.00

120-Gallon Air Compressors for High-Demand Shops

A Bigger Reserve Means Fewer Motor Cycles

A 120-gallon tank stores more compressed air than an 80-gallon unit, so the motor cycles less often and the pump keeps up when several tools draw at once. That reserve is what separates a busy multi-bay service floor from a single-operator shop: when three techs hit impact wrenches at the same time, the larger tank holds pressure while the pump catches up. Every model here is two-stage with a cast-iron pump rated to 175 PSI for continuous-duty work.

Simplex or Duplex Output

Simplex 120-gallon models run one pump and motor and cover 10 to 15 HP demand. Duplex models put two pumps and motors on the single 120-gallon tank, which doubles output for a high-demand floor and provides redundancy: if one head goes down for service, the other keeps the shop running. Duplex units with magnetic starters add auto-alternating lead and lag control so the two motors share wear evenly. For pressurized-system safety, review the OSHA compressed-gas equipment guidance.

Power and Placement

These are three-phase-friendly units; 10 HP models come in single or three-phase, and 15 HP is three-phase only. All are horizontal for a low, stable footprint and ship by freight at roughly 830 to 1,760 pounds, so plan for a dock or liftgate. Related: Air Compressors · Electric Air Compressors · 80-Gallon Air Compressors. For a high-output floor, the AED-46315 15 HP duplex compressor delivers 93 CFM at 175 PSI.

Frequently Asked Questions

How much space does a 120-gallon air compressor cover?
Tank size is about reserve capacity, not coverage. A 120-gallon unit stores enough air to run multiple tools at once without the motor short-cycling, which suits a multi-bay shop or busy service floor.
What is a duplex 120-gallon compressor?
A duplex unit mounts two separate pump-and-motor assemblies on one 120-gallon tank. They alternate or run together for higher output and redundancy, so the shop keeps running if one head needs service.
What horsepower comes on a 120-gallon compressor?
Mi-T-M 120-gallon models run 10 HP simplex, 15 HP simplex, and 5 to 15 HP duplex configurations. Higher horsepower delivers more CFM for heavier or simultaneous tool use.
Does a 120-gallon compressor need three-phase power?
Some do. The 10 HP models come in single-phase or three-phase; 15 HP models are three-phase only. Confirm your building has the right service before ordering.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare