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 $17,709.00 - Original price $17,709.00
Original price
$17,709.00
$17,709.00 - $17,709.00
Current price $17,709.00

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

Mi-T-M
In stock

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

View full details
Original price $17,709.00 - Original price $17,709.00
Original price
$17,709.00
$17,709.00 - $17,709.00
Current price $17,709.00
Original price $17,720.00 - Original price $17,720.00
Original price
$17,720.00
$17,720.00 - $17,720.00
Current price $17,720.00

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

Mi-T-M
In stock

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

View full details
Original price $17,720.00 - Original price $17,720.00
Original price
$17,720.00
$17,720.00 - $17,720.00
Current price $17,720.00
Original price $18,478.00 - Original price $18,478.00
Original price
$18,478.00
$18,478.00 - $18,478.00
Current price $18,478.00

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

Mi-T-M
In stock

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

View full details
Original price $18,478.00 - Original price $18,478.00
Original price
$18,478.00
$18,478.00 - $18,478.00
Current price $18,478.00
Original price $20,744.00 - Original price $20,744.00
Original price
$20,744.00
$20,744.00 - $20,744.00
Current price $20,744.00

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

Mi-T-M
In stock

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

View full details
Original price $20,744.00 - Original price $20,744.00
Original price
$20,744.00
$20,744.00 - $20,744.00
Current price $20,744.00
Original price $13,194.00 - Original price $13,194.00
Original price
$13,194.00
$13,194.00 - $13,194.00
Current price $13,194.00

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

Mi-T-M
In stock

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

View full details
Original price $13,194.00 - Original price $13,194.00
Original price
$13,194.00
$13,194.00 - $13,194.00
Current price $13,194.00
Original price $13,154.00 - Original price $13,154.00
Original price
$13,154.00
$13,154.00 - $13,154.00
Current price $13,154.00

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

Mi-T-M
In stock

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

View full details
Original price $13,154.00 - Original price $13,154.00
Original price
$13,154.00
$13,154.00 - $13,154.00
Current price $13,154.00
Original price $13,531.00 - Original price $13,531.00
Original price
$13,531.00
$13,531.00 - $13,531.00
Current price $13,531.00

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

Mi-T-M
In stock

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

View full details
Original price $13,531.00 - Original price $13,531.00
Original price
$13,531.00
$13,531.00 - $13,531.00
Current price $13,531.00
Original price $13,055.00 - Original price $13,055.00
Original price
$13,055.00
$13,055.00 - $13,055.00
Current price $13,055.00

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

Mi-T-M
In stock

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

View full details
Original price $13,055.00 - Original price $13,055.00
Original price
$13,055.00
$13,055.00 - $13,055.00
Current price $13,055.00
Original price $12,852.00 - Original price $12,852.00
Original price
$12,852.00
$12,852.00 - $12,852.00
Current price $12,852.00

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

Mi-T-M
In stock

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

View full details
Original price $12,852.00 - Original price $12,852.00
Original price
$12,852.00
$12,852.00 - $12,852.00
Current price $12,852.00
Original price $12,746.00 - Original price $12,746.00
Original price
$12,746.00
$12,746.00 - $12,746.00
Current price $12,746.00

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

Mi-T-M
In stock

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

View full details
Original price $12,746.00 - Original price $12,746.00
Original price
$12,746.00
$12,746.00 - $12,746.00
Current price $12,746.00
Original price $12,933.00 - Original price $12,933.00
Original price
$12,933.00
$12,933.00 - $12,933.00
Current price $12,933.00

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

Mi-T-M
In stock

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

View full details
Original price $12,933.00 - Original price $12,933.00
Original price
$12,933.00
$12,933.00 - $12,933.00
Current price $12,933.00
Original price $12,307.00 - Original price $12,307.00
Original price
$12,307.00
$12,307.00 - $12,307.00
Current price $12,307.00

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

Mi-T-M
In stock

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

View full details
Original price $12,307.00 - Original price $12,307.00
Original price
$12,307.00
$12,307.00 - $12,307.00
Current price $12,307.00
Original price $12,629.00 - Original price $12,629.00
Original price
$12,629.00
$12,629.00 - $12,629.00
Current price $12,629.00

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

Mi-T-M
In stock

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

View full details
Original price $12,629.00 - Original price $12,629.00
Original price
$12,629.00
$12,629.00 - $12,629.00
Current price $12,629.00
Original price $10,398.00 - Original price $10,398.00
Original price
$10,398.00
$10,398.00 - $10,398.00
Current price $10,398.00

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

Mi-T-M
In stock

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

View full details
Original price $10,398.00 - Original price $10,398.00
Original price
$10,398.00
$10,398.00 - $10,398.00
Current price $10,398.00
Original price $10,044.00 - Original price $10,044.00
Original price
$10,044.00
$10,044.00 - $10,044.00
Current price $10,044.00

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

Mi-T-M
In stock

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

View full details
Original price $10,044.00 - Original price $10,044.00
Original price
$10,044.00
$10,044.00 - $10,044.00
Current price $10,044.00
Original price $10,170.00 - Original price $10,170.00
Original price
$10,170.00
$10,170.00 - $10,170.00
Current price $10,170.00

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

Mi-T-M
In stock

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

View full details
Original price $10,170.00 - Original price $10,170.00
Original price
$10,170.00
$10,170.00 - $10,170.00
Current price $10,170.00
Original price $11,313.00 - Original price $11,313.00
Original price
$11,313.00
$11,313.00 - $11,313.00
Current price $11,313.00

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

Mi-T-M
In stock

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

View full details
Original price $11,313.00 - Original price $11,313.00
Original price
$11,313.00
$11,313.00 - $11,313.00
Current price $11,313.00
Original price $542.99 - Original price $542.99
Original price
$542.99
$542.99 - $542.99
Current price $542.99

Mi-T-M IX-0032 Tank Drain, 120 Gallon

Mi-T-M
In stock

Tank Drain, 120 Gallon. Genuine Mi-T-M factory part. Check fitment against your equipment's parts diagram or operator manual before ordering.

Original price $542.99 - Original price $542.99
Original price
$542.99
$542.99 - $542.99
Current price $542.99

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