How to Pick the Perfect Twin-Stack Compressor
Twin stack air compressors, also known as double stack air compressors, have two...
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Recommended Accessories
Expert Recommended Accessories
Selected by Melissa, our Expert
Required Accessories
9
These accessories are required to properly setup/install this product.
Optional Accessories
10
Features
Grade
Contractor
Style
Twin Stack
CFM
4.4
Tank Size
4.5
Ingersoll Rand 2-HP 4-Gallon Contractor Twin Stack Air Compressor
Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."
- Cast-Iron Construction
- Designed for the toughest 100% continuous duty applications
- Oil-Lube Pump
- Has double the life of similar oil-free pumps
- Job Site Uses
- Great for trim, roofing, decking, framing, sheathing, etc
- 4-Gallon Twin Stack Tank
- Convenient and efficient air storage system
- Cold Season Ready
- All season select lubricant and low amp draw
- Lightweight and Compact
- Easily transport this unit from job site to job site
California residents see
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
For more information go to: www.p65Warnings.ca.gov
Specifications
P1IU-A9
General Information
Product Category
Air Compressor - Portable
Motor
Voltage
120 Volt AC
Phase
1-Phase
dBA
dBA
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB.
79
Magnetic Starter
Magnetic Starter
The Magnetic Starter is the "thinking cap" for the motor of the air compressor. Magnetic starters are electromagnetically operated switches that provide a safe method for certain motors to be started under a large motor load.
No
Amp Draw
15
Engine
HP
2
Pump
CFM
CFM
Cubic Feet Per Minute, which indicates the compressor's flow rate - or the amount of air that a compressor can produce at a given pressure level. Typically compressors that have higher CFM ratings are able to provide more air, which makes them ideal for larger applications
4.4
CFM Rated @
90 PSI
Pump Material
Aluminum w/ Cast Iron Sleeve
Max PSI
Max PSI
PSI, or Pounds Per Square Inch, measures the amount of pressure placed on a square inch of space. In compressor terms, PSI is the amount of force that an air compressor can deliver
135 PSI
Oil Sight Glass
No
Pump Type
Single-Stage
After Cooler
After Cooler
An aftercooler is a mechanical heat exchanger designed to remove the heat and moisture of compression from a compressed air stream so the air is cool and dry enough for use in air-operated equipment. A compressed air aftercooler has three primary functions: Cool the air discharged from the air compressor
No
Pump Drive
Direct Drive
Oil Type
Oil Lubricated
Oil System
Splash Lubricated
Pump Low Oil Shut-off
Pump Low Oil Shut-off
Prevents the air compressor from operating or restarting without an adequate amount of oil in the compressor
No
Tank
Tank Size
4.5 Gallons
Tank Outlet
1/4 Inch
Electronic Drain Valve
Electronic Drain Valve
The inexpensive and reliable electric drain valve (EDV) automatically removes condensate from your air system. It has an integral strainer to prevent clogging and saves time and money by eliminating the need for manual draining
No
Tank Orientation
Horizontal
Accessories
Pressure Gauge
Yes
Air Dryer
No
Overview
Product Category
Air Compressor - Portable
Weight
77 Pounds
Certification
CSA
Consumer Warranty
1 Year
Commercial Warranty
1 Year
Product Length
19 Inches
Product Width
19 Inches
Product Height
19 Inches
Power Type
Electric
UPC
678384729499
Reviews
(30)
Ingersoll Rand P1IU-A9 Reviews & Ratings
Customer Rating
4.67
(29 Ratings)
5
(23)
(23)4(3)
(3)3(2)
(2)2(1)
(1)1(0)
(0)
An Ingersoll Rand compressor speaks for itself with a reputation for durability and reliability; this unit is no exception. The 2-HP 4-Gallon Contractor Twin Stack is great for various jobs such as trim, roofing, decking, framing, sheathing, etc.
The 120V electric motor gives you 4.4 CFM at 90 PSI. The wrap-around design protects the motor and pump. This unit is plumbed to run 2 hoses at once with a separate gauges for each hose, doubling your productivity by letting 2 people work at once or keeping 2 tools ready for use.
The durable cast iron cylinder and rugged pump ensure long service life for you.
The 120V electric motor gives you 4.4 CFM at 90 PSI. The wrap-around design protects the motor and pump. This unit is plumbed to run 2 hoses at once with a separate gauges for each hose, doubling your productivity by letting 2 people work at once or keeping 2 tools ready for use.
The durable cast iron cylinder and rugged pump ensure long service life for you.
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Packs A Punch For Its Size
By Josh Z
IL
Review Posted 03/17/2023
This little unit really works well. It holds up to tough jobs and continuous use. I use it for my projects around the house. But most impressively, I had once used it for weeks in an application that required continuous air pressure for 3 weeks straight. For this the compressor ran for one minute and then was able to rest for one minute. It ran like this for 3 entire weeks without issue. The only maintenance I did during this time was drain the water out of the tanks, and check the oil level. But, as other have pointed out, this is heavy, and this should be taken into consideration. I am a larger man and i struggle throwing this around. I would recommend having a dolly handy if you plan on moving this around allot.
Josh Z Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
4/5
Pros:
I'd Buy It Again, Easy To Store
Cons:
Heavy, Expensive
Very Well Designed And Built
By Wayne G.
Spokane, Washington
Purchased 03/19/2020 |
Review Posted 04/11/2020
Perfect size for a hobby air compressor. Better product than I expected.
Wayne G. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
4/5
4/5
Pros:
Easy To Use, Id Buy It Again, High Quality, Exceeded Expectations
Cons:
No negative issues
It's One Of The Best Air Compressors I Ever Had
By Karl P.
Mulliken, Michigan
Purchased 09/05/2014 |
Review Posted 10/05/2018
It's a very good compressor, I love it. Easy to use and recovers quickly - no problems with this one.
Karl P. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Pros:
Easy To Use, Price, Fast, Features
Bought It- Now Selling it.
By Joe H.
Gardnerville, Nevada
Review Posted 07/26/2017
Heavy and cheaply made are the first things that come to mind with this compressor. Within a month of owning this compressor the air filter, made of plastic and plastic inlet nipple snapped off. had to order a new one.
Then a month later the four soft rubber legs systematically began to shred. Rather than ordering more, I replaced with aftermarket hardened rubber legs which have held up.
I had a Campbell Hausfeld for nearly 20 years that never caused me a bit of problems. This IR is very poorly constructed with cheap parts.
Then a month later the four soft rubber legs systematically began to shred. Rather than ordering more, I replaced with aftermarket hardened rubber legs which have held up.
I had a Campbell Hausfeld for nearly 20 years that never caused me a bit of problems. This IR is very poorly constructed with cheap parts.
Joe H. Does Not Recommend This
Was this review helpful?
Rating Breakdown
3/5
1/5
4/5
2/5
Cons:
Heavy, Low Quality
It Was A Christmas Gift For My Son. He Loves It
By Deborah F.
Bloomington, Illinois
Purchased 10/16/2016 |
Review Posted 12/26/2016
Gift for my son, he loves it.
Deborah F. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Pros:
I'd Buy It Again
Cons:
Heavy
My P1IU-A9
By John McN.
Lilliwaup, Washington
Purchased 12/21/2015 |
Review Posted 01/25/2016
My IR arrived with a bent tank gauge. The factory sent me a replacement, since then it has been in service with little use but works as expected!!
John McN. Recommends This
Was this review helpful?
Rating Breakdown
4/5
5/5
5/5
5/5
Good Compressor
By Mark S.
Coupeville, Washington
Purchased 10/04/2015 |
Review Posted 11/16/2015
As others have noted, this compressor is heavy. It barely meets the definition of portable, especially if you are not as youthful as you may think you are. It could use a wheel kit.
On the other hand it is fairly quiet and powerful and seems well built.
The gauges are hard to read if you are standing above compressor, which you likely will be most of the time.
On the other hand it is fairly quiet and powerful and seems well built.
The gauges are hard to read if you are standing above compressor, which you likely will be most of the time.
Mark S. Recommends This
Was this review helpful?
Rating Breakdown
4/5
5/5
5/5
4/5
Pros:
Easy To Use, Quiet, Fast, High Quality
Cons:
Heavy, Could Use A Wheel Set, Gauges Are Not Easy To See When Standing Above Compressor
Yes sir
By James S.
Gravette, Arkansas
Purchased 03/07/2015 |
Review Posted 03/28/2015
Quality product. Runs smooth. Very happy.
James S. Recommends This
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Manufacturer Response
Thank you for taking the time to review our product! We highly value your opinion and we are more than happy to have met your compressor needs.
Rating Breakdown
5/5
5/5
5/5
5/5
It's perfect.
By Tracey Z.
Englewood, Colorado
Purchased 11/04/2014 |
Review Posted 11/25/2014
Thank you, our air compressor is amazing. Everything was perfect from ordering to shipping. Thanks again!
Tracey Z. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Ingersol Rand Air Compressor
By Gary C.
Pensacola, Florida
Purchased 09/30/2014 |
Review Posted 11/12/2014
Unit does exactly what I wanted it to do.
It seems to be of good quality.
I hope to be using it a long time.
It seems to be of good quality.
I hope to be using it a long time.
Gary C. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
Product Q&A
(2)
Product Questions
Answered by Melissa, the Air Compressor Expert
How many amps does this pull?
Grady C.
from Texas
February 26, 2020
I'm looking to replace my Ingersoll Rand model #DD2T2 but can't find that model anywhere. Does Ingersoll make the same compressor with a different model number?
from
April 26, 2011
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Ingersoll Rand 2-HP 4-Gallon Contractor Twin Stack Air Compressor
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