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
40+ 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.

Filters

from Original price
Original price
$14,728.00
from $14,728.00
Current price $14,728.00

Mi-T-M AED-46315-120H Duplex Compressor – 93.0 CFM @ 175 PSI, 120-Gal, 460V 3Ø

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
from Original price
Original price
$14,728.00
from $14,728.00
Current price $14,728.00
from Original price
Original price
$14,808.00
from $14,808.00
Current price $14,808.00

Mi-T-M AED-23315-120H Duplex Compressor – 93.0 CFM @ 175 PSI, 120-Gal, 230V 3Ø

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
from Original price
Original price
$14,808.00
from $14,808.00
Current price $14,808.00
from Original price
Original price
$15,615.00
from $15,615.00
Current price $15,615.00

Mi-T-M AED-20315-120H Duplex Compressor – 93 CFM @ 175 PSI, 120-Gal Horizontal

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
from Original price
Original price
$15,615.00
from $15,615.00
Current price $15,615.00
from Original price
Original price
$11,806.00
from $11,806.00
Current price $11,806.00

Mi-T-M ADD-46310-120H Duplex Compressor – 68.4 CFM @ 175 PSI, 120-Gal, 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
from Original price
Original price
$11,806.00
from $11,806.00
Current price $11,806.00
from Original price
Original price
$11,814.00
from $11,814.00
Current price $11,814.00

Mi-T-M ADD-23310-120H Duplex Compressor – 68.4 CFM @ 175 PSI, 120-Gal, 230V 3Ø

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
from Original price
Original price
$11,814.00
from $11,814.00
Current price $11,814.00
from Original price
Original price
$12,319.00
from $12,319.00
Current price $12,319.00

Mi-T-M ADD-20310-120H Duplex Compressor – 68.4 CFM @ 175 PSI, 120-Gal, 200V 3Ø

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
from Original price
Original price
$12,319.00
from $12,319.00
Current price $12,319.00
from Original price
Original price
$13,830.00
from $13,830.00
Current price $13,830.00

Mi-T-M ADD-23110-120H Duplex Compressor – 68.4 CFM @ 175 PSI, 120-Gal, 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
from Original price
Original price
$13,830.00
from $13,830.00
Current price $13,830.00
from Original price
Original price
$8,796.00
from $8,796.00
Current price $8,796.00

Mi-T-M ACD-46375-120H Duplex Compressor – 46.4 CFM @ 175 PSI, 120-Gal, 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
from Original price
Original price
$8,796.00
from $8,796.00
Current price $8,796.00
from Original price
Original price
$8,770.00
from $8,770.00
Current price $8,770.00

Mi-T-M ACD-23375-120H Duplex Compressor – 46.4 CFM @ 175 PSI, 120-Gal, 230V 3Ø

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
from Original price
Original price
$8,770.00
from $8,770.00
Current price $8,770.00
from Original price
Original price
$9,021.00
from $9,021.00
Current price $9,021.00

Mi-T-M ACD-20375-120H Duplex Compressor – 46.4 CFM @ 175 PSI, 120-Gal Horizontal

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
from Original price
Original price
$9,021.00
from $9,021.00
Current price $9,021.00
from Original price
Original price
$8,704.00
from $8,704.00
Current price $8,704.00

Mi-T-M ACD-46305-120H Duplex Compressor – 36.0 CFM @ 175 PSI, 120-Gal, 460V 3Ø

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
from Original price
Original price
$8,704.00
from $8,704.00
Current price $8,704.00
from Original price
Original price
$8,568.00
from $8,568.00
Current price $8,568.00

Mi-T-M ACD-23305-120H Duplex Compressor – 36.0 CFM @ 175 PSI, 120-Gal, 230V 3Ø

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
from Original price
Original price
$8,568.00
from $8,568.00
Current price $8,568.00
from Original price
Original price
$8,498.00
from $8,498.00
Current price $8,498.00

Mi-T-M ACD-20305-120H Duplex Compressor – 36.0 CFM @ 175 PSI, 120-Gal, 200V 3Ø

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
from Original price
Original price
$8,498.00
from $8,498.00
Current price $8,498.00
from Original price
Original price
$8,622.00
from $8,622.00
Current price $8,622.00

Mi-T-M ACD-23105-120H Duplex Compressor – 36.0 CFM @ 175 PSI, 120-Gal, 230V 1Ø

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
from Original price
Original price
$8,622.00
from $8,622.00
Current price $8,622.00
from Original price
Original price
$8,205.00
from $8,205.00
Current price $8,205.00

Mi-T-M AES-46315-120H Simplex Compressor – 46.5 CFM @ 175 PSI, 120-Gal, 460V 3Ø

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
from Original price
Original price
$8,205.00
from $8,205.00
Current price $8,205.00
from Original price
Original price
$8,420.00
from $8,420.00
Current price $8,420.00

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
from Original price
Original price
$8,420.00
from $8,420.00
Current price $8,420.00
from Original price
Original price
$6,932.00
from $6,932.00
Current price $6,932.00

Mi-T-M ADS-46310-120H Simplex Compressor – 34.2 CFM @ 175 PSI, 120-Gal, 460V 3Ø

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
from Original price
Original price
$6,932.00
from $6,932.00
Current price $6,932.00
from Original price
Original price
$6,696.00
from $6,696.00
Current price $6,696.00

Mi-T-M ADS-23310-120H Simplex Compressor – 34.2 CFM @ 175 PSI, 120-Gal, 230V 3Ø

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
from Original price
Original price
$6,696.00
from $6,696.00
Current price $6,696.00
from Original price
Original price
$6,780.00
from $6,780.00
Current price $6,780.00

Mi-T-M ADS-20310-120H Simplex Compressor – 34.2 CFM @ 175 PSI, 120-Gal, 200V 3Ø

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
from Original price
Original price
$6,780.00
from $6,780.00
Current price $6,780.00
from Original price
Original price
$7,542.00
from $7,542.00
Current price $7,542.00

Mi-T-M ADS-23110-120H Simplex Compressor – 34.2 CFM @ 175 PSI, 120-Gal, 230V 1Ø

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
from Original price
Original price
$7,542.00
from $7,542.00
Current price $7,542.00

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