Air Hose Size for Impact Wrench – The Ultimate Guide

Air Hose Size for Impact Wrench – The Ultimate Guide

A lot of people struggle with figuring out what size air hose is right for their impact wrench. With the right size, you’ll get the best performance from your impact wrench

An air hose is a necessary tool for anyone using an air-powered impact wrench. But what size do you need? In this blog post, we will discuss everything you need to know about air hose sizes for impact wrenches.

So whether you’re a professional mechanic or just someone who likes to do their own repairs around the house, read this detailed guide to pick the perfect air hose size for your impact wrench!

How Important is it to have the right kind of Air hose?

It is very crucial to have an air hose of appropriate size because if not it can result in a lot of problems. For example, having an air hose that’s too small will limit the airflow to your impact wrench, which can cause the tool to run less efficiently and even overheat.

On the other hand, using an air hose that’s too large can be just as problematic. An air hose that’s too big can result in a lot of air being wasted, which is not only a waste of money but also bad for the environment.

Read this guide to know how to oil an impact wrench.

What size Air hose do I need for a 1/2 Impact wrench?

For a ½ inch impact wrench, you will need an air hose that has 35 feet of air hose length. This will ensure that there is enough airflow to power your impact wrench without wasting air. If you have a larger air compressor, you may be able to use a larger air hose, but it is not necessary.

What size Air hose do i need for a 3/8-Inch Impact Gun?

38-Inch Impact Wrench
3/8-Inch Impact Wrench

A ⅜ impact wrench is the most convenient tool for fastening or removing nuts and bolts with precision. When comparing a ⅜ impact wrench to the one we discussed earlier, it requires a similar length of a ⅜ air hose of 25 feet for decent airflow.

If you are confused about which tool to buy for your next project

What size Air hose do I need for a 3/4 Impact wrench?

You’ll need a ½ inch air hose. A ½ inch air hose will be able to deliver enough air to handle the impact wrench. If the air hose length is about 50 feet, the ¾ sized hose would be the most suitable option.

What is the recommend Air hose size for 1 inch Impact wrench?

It is quite common on construction sites to use 1-inch impact wrenches, and you are unlikely to find them in average homes. Usually, high-torque impact wrenches are capable of consuming more than 45 CFM of airflow when being used at full load. It is recommended that if you are going to use a hose for a distance above 50 feet, then you should consider using a 1-inch hose as well. When using a 1-inch impact wrench, it is recommended to use a ¾ sized air hose.

What size Air hose do i need for ¼-Inch Impact Wrench?

There are almost no impact wrenches smaller than ¼ inch. The ¼ impact wrench is quite enough for dealing with wood and wood fasteners. When using a ¼ inch hose and the length exceeds 25 feet, it is advised that you choose a ⅜ size hose for smoother operations. In the same way, if the length exceeds 35 feet, you must use a ½ inch air hose.

Hybrid Hose

The three materials that hybrid air hoses are composed of are rubber, polyurethane, and PVC. Due to the combination of polyurethane, PVC, and rubber used in hybrid hoses, they remain extremely flexible and durable, even when temperatures start to plunge below zero degrees. Have trouble untangling air hoses? Then you should consider the hybrid hose.

Polyurethane Hose

Polyurethane air hose is an economical and multipurpose all-purpose solution that is often called as all around hose. Typically, a retractable air hose is made of polyurethane, which is one of the lightest air hose materials. One of the most important advantages of this product is that it weighs significantly less than comparable hybrid and PVC alternatives, so it will be easier to transport around a job site. Moreover, the material is able to adapt to most working environments with different temperatures. While polyurethane coils seem like a good solution, over the years they deteriorate, kink, and tangle, which makes them a safety hazard.

PVC Hose

Aside from being highly durable, PVC hoses also possess excellent resistance to abrasion. Although this type is less flexible than those mentioned above, in a warm climate it is ideal. On top of that, they are the least expensive materials. So eventually, being the stiffest, their use makes them the most economical option. Furthermore, in moderate and warm temperatures, it is easy to navigate. Cold weather makes handling the hose more challenging. The kinks make it very difficult to handle, and there’s a greater chance of leakage at the kink points.


There are many types of materials that can be used for air hoses, but the most common and suitable is rubber. Rubber is extremely abrasion-proof, extremely durable, and does not kink or crack as easily as PVC. In this list, it is the most appropriate since it is capable of operating at all ranges of temperatures. It can be used in extreme climates without losing its elasticity, which is similar to how it works in other varieties of materials. Additionally, it is one of the best choices if money is not a factor. However, there are a few disadvantages you need to be aware of. It is the heaviest material used in the air hoses, therefore it tends to pick up dirt as it is dragged along the ground.

Durability and FlexibilityTends to coil and kinkVery durableVulnerable to certain solvents, less flexible
WeightVery light, easy to carryHeaviest type of air hoseVery light, easy to carry
Cold weatherPoor cold weather performanceMediocre performance in the coldExcellent performance
UsesMedium duty usageRegular to heavy-duty useDurable and useful for high-pressure applications
PriceBudget-friendlyMedium BudgetAffordable

How to choose a right Air hose for your Impact Wrench

Various operations require different sizes of air hoses. Fitting couplers and connectors correctly should not affect the power or stability of an impact wrench. Before choosing the suitable air hose for your impact wrench, you should pay attention to its length, diameter, thickness, and weight. Now, let’s dive in.

Choose the right length

It is important to select the appropriate length of air hose based on the activity. You can extend the cable to your desired length with other connectors, but a 25ft length will generally suffice. A long air hose will depressurize the system.

Determine the right diameter

Air hoses typically have a diameter of 3/8 inches. For example, in the case of a 1/2-inch wrench, a 3/8″ diameter is the most suitable. In large diameters, greater airflow and volume is needed to generate more torque power.
One more diameter, 1/4″, is suitable for machines with little torque and applications.


The material of the air hose should be flexible and light. The weight of long air hoses may affect air pressure delivery as well. An extra-large hose is also not a good idea. Instead, you can easily store a light air hose.

Understand the pressure

Different hoses have different maximum pressure ratings. As a matter of safety, it is very important to ensure that the air supply to the hose is of sufficient pressure. In the other case, you may end up with a burst hose if you exceed the resistance of your hose. It is recommended that you use a hose that has a higher working pressure than the tool you intend to use. Due to this, the tool receives the right amount of air pressure in order to be able to work effectively.

Choose the Right Material

In order to prevent premature hose aging, make sure you choose the material that will perform optimally in all kinds of the working environments.

Do you work outside in the middle of winter at a temperature of -25 degrees?

Then you should choose a polymer that can withstand extreme temperatures and keep its flexibility.

A polyurethane hose would be a better choice if you were working outside on a roof during the summer since it is lighter and more UV resistant than rubber hoses.

Do you work in a welding shop?

It would be a good idea to use a rubber hose that doesn’t ignite.

Does your garage come into contact with oils?

Then you should look for a rubber hose that has an oil-resistant coating on it.

Do you work in a paint shop?

It may be best for you to choose a technopolymer hose resistant to chemicals and solvents.

How do I know what size air compressor I need for my impact wrench?

The size air compressor you need depends on the size of your impact wrench. A general rule of thumb is that you will need an air compressor that can deliver at least four CFM (cubic feet per minute) for every one horsepower (HP) of your Impact Wrench. So, for example, if you have a ½-inch impact wrench that is rated at four CFM, you will need an air compressor that can deliver 16 CFM.

Tool SizeAir ConsumptionPressure
1/2-Inch Impact Wrench5 CFM90-100 PSI
3/4-inch Impact Wrench7 CFM90-100
3/8-inch Impact Wrench3 CFM90 PSI


The ideal air hose size for the impact wrench is large enough to ensure a constant airstream at the appropriate pressure. The air pressure required to operate your impact wrench should be projected using the right length and diameter.


Bahram Shahab
Bahram here! A certified Electrical Engineer who knows his way around using power tools like a professional. My journey of using these robust tools started back when I graduated. Since then, I have finished almost a dozen DIY woodworking jobs. Apart from that, I have developed this habit of jotting down my personal experience about using a specific tool. So, I write on them to help the community in the best possible way.