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Refrigerant Hoses

Get the most authentic, genuine, long-lasting refrigerant hoses for your hydraulic application even in the toughest environments.

Check our top brands such as MastercoolJavacRobinairFieldpieceImperialHydrocellYellow JacketInficonNeutronics, and many more to easily find the right tools you need.





Refrigerant hoses are one of the many pieces of equipment and materials needed to service an automobile's air conditioning system. When repairing a car's air conditioning system, refrigerant hoses let you add or remove refrigerant. These hoses have a variety of fittings, varying diameters, and other features. Keep reading to learn more about charging and evacuation hoses for air conditioners.

Refrigerant Hoses

Refrigerant hoses are a kind of hoses used to charge or discharge refrigerant from an air conditioning unit. You can also refer to them as AC service hoses because they aid in monitoring a car's HVAC system when utilised with pressure gauges.

The diameters of adapters and fittings that come with refrigeration hoses vary. Others are made primarily for vacuum service or low-pressure fluid transfer, while some are for high-pressure applications.

A flexible tube with fittings or couplings on either end is the shape of the typical AC hose. Typically, it will support a certain kind of refrigerant, while it may also be universal and work with all types. A deeper look at the interior design of these hoses is provided below.

Parts of Refrigerant Hoses

Hoses for air conditioners are often constructed from many layers of pliable but durable material. In addition to protecting it from the elements outside, this enables them to keep refrigerant within. The following layers are part of the layers that help guarantee the hoses' toughness.

  • Outer Layer: The rubber covering visible on the refrigeration hose's exterior is the outermost layer or outer cover. The coating shields the inner layers from harm.
  • Woven Fabric: Under the outer cover is a layer made of woven fabric. Its purpose is to give the hose structural support or strength.
  • Inner Layer: The layer closest to the refrigerant is the innermost layer. It's generally rubber and acts as permeation protection. Some refrigerant hoses may include a second layer of nylon beneath this layer.

Rubber is the material of choice for refrigerant hoses. They are hence exceedingly adaptable. Working with a flexible refrigerant hose is simple. It won't crack when twisted into various orientations for car AC system maintenance.

Refrigerant Hose Set




The many tools you use in conjunction with refrigerant hoses when repairing an air conditioning system are included in a package. It also comprises other hose varieties like charging, evacuation, and pressure testing hoses. It is possible to recognise each array because of the various hues. Usually, these will be color-coded.

  • Red refrigerant hoses can be used to replenish the system or remove the extra refrigerant and are for attaching to the high-pressure side of the air conditioning system or pressure gauges.
  • The blue refrigerant pipe is often used to remove air from the system or add refrigerant to it. Additionally, it joins to the low-pressure side and is a component of the HVAC manifold hoses.
  • The yellow refrigerant hose charges and releases refrigerant. It attaches to the centre port when used with manifold gauges.

How to Use an AC Refrigerant Hose?

An AC manifold gauge set normally uses three color-coded hoses:

  • A central, yellow hose for charging or evacuating refrigerant
  • A red hose for the high-pressure line
  • A blue hose for the low-pressure line

The red and blue hoses assist with measuring the high and low pressures of the AC system. It aids in testing the system for flaws like leaks and low refrigerant levels.





When a cooling agent cycle between the evaporator and the condenser in a cooling system, its properties (pressure, temperature, and state) change, which is used in cooling and air-conditioning installations. The refrigerating compressor propels the cooling agent's circulation. In the evaporator, the refrigerant absorbs heat through evaporation, and in the condenser, it releases heat through the condensation of vapour. There are numerous refrigerants, including water, carbon dioxide, and ammonia, but freons constitute a unique class of low-boiling hydrocarbons.

Elastic freon hoses are frequently used in smaller industrial cooling installations and the air conditioning systems of many vehicles (cars, machines, trains, and trams). The refrigerant used in these installations is a mixture of compressor oil (such as PAG synthetic oil) and freon (such as R134a, R1234yf). It moves throughout the system while experiencing constant pressure and temperature changes. As a result, standards for freon hoses are very strict. Due to freon's high cost, extreme penetration, and environmental harm, the system must be impeccably tight. It must possess exceptional resistance to pressure, temperature, chemicals, and permeation of humidity through the hose wall. It specifically affects automotive air conditioning since the freon hose operates in the engine compartment, close quarters, bent, at high ambient temperature, subject to vibrations, and in touch with automotive fluids.

The air-conditioning hoses, especially those designed for cars, are mounted with unique fittings, frequently devoted to one make or model of vehicle.




Refrigerant Hose Sizes

Depending on the use and the hose type, refrigerant hoses come in a wide range of sizes in terms of diameter and length. For instance, a charging or vacuum hose often has a greater diameter than a high-pressure or discharge line.

Starting with the interior diameter, refrigerant hose diameters include ¼, ⅜", ⅛," and ⅝." Hoses often come in 14-inch sizes. The most typical refrigerant hose is between three and five feet long. The 5-foot hoses work with a variety of HVAC tools and are suitable for the majority of applications.

Numerous hose functions are affected by these sizes. For instance, refrigerant vacuum or evacuation hoses must have a high diameter. It guarantees quicker fluid drainage and improves the effectiveness of emptying the AC system.



Hose maintenance is a new idea for some HVAC specialists. What about replacing hose seals or gaskets? Successful daily service and installation depend on proper hose maintenance. While testing or evacuating, leaks may occur if hose seals degrade or break. In rare instances, I have also seen flow restrictions. It depends on how often you use and abuse your hoses. The number one reason seals break is overtightening your hoses, so be careful not to do this. Examine seals before usage. If they appear worn or compressed, it is time to replace them.

AC Low-Pressure Hose

The evaporator, condenser, dryer, and compressor are components that make up the air conditioning unit in your car. A refrigerant, which is transported to and removed from the various components by hoses, powers the system. The high-pressure hoses deliver the refrigerant, while the low-pressure hoses remove the refrigerant from the parts. As their name implies, low-pressure hoses operate with less pressure than high-pressure hoses.

Your AC hoses should last a very long time, possibly the entire lifetime of your car. However, bear in mind that because they are composed of rubber, they are susceptible to deterioration and cracking over time. The presence of heated coolant can speed up this process. Your AC low-pressure hoses should last at least ten years and no longer than eight. And the likelihood that they will leak increases with age. If they do, your engine could overheat, costing you money in repairs.




AC High-Pressure Hose

The majority of automobiles have highly advanced AC systems. They often need high and low pressures to operate. The refrigerant enters the AC system at two different pressures: low pressure, where it begins as a gas, and high pressure, when it is changed from a gas to a liquid, so it can move through the system. Both sides cooperate to keep the refrigerant flowing for the system to operate effectively. The AC high-pressure hose's responsibility is to transport the coolant from the compressor outlet towards the receiver/drier, where it will be cooled and used to create cool air for the cabin.

The AC high-pressure hose is under a lot of stress because it transports high-pressure refrigerant. It may malfunction, like any other component, leading to issues for the rest of the system. When the AC high-pressure hose starts to have difficulties, it will normally present a few signs that can inform the driver that it requires care.





Which refrigerant hoses for HVAC are best? Let's dig a little deeper to examine the factors. Most of the time, the material, hose size, end fitting types, and adapters depend on how suitable or high-quality HVAC hoses are. Keep an eye out for these characteristics when buying the AC hoses you'll use to repair a car's AC system.


A few AC hoses are designed for a particular refrigerant. For instance, R-12 refrigerants cannot be used with a 134a refrigerant pipe. The hoses are usually offered in a variety of colours to prevent confusion. The most typical colours are red, blue, and yellow, with occasional green and black. These colour codes typically indicate the type of coolant the hose is designed for.


Various hose varieties will work best in a variety of applications. For example, when adding refrigerant to an automobile's air conditioning or AC system, the refrigerant charge hose is generally used. These are frequently a lesser size than vacuum refrigeration hoses in diameter. These hoses restrict the flow of coolant when used as vacuum hoses.


The operating and burst pressures of AC refrigerant hoses must be marked. The values will typically rely on the kind of hoses used and the kind of refrigerant it was designed for. The specifications are normally 800 psig and 4000 psig at forces greater than R-410a. Most hoses designed for pressures lower than R-410a are typically specified for an operating pressure of 500 PSIG and a burst pressure of 2500 PSIG.

Other Factors

  • The length of the AC hose determines whether it is long enough to reach all of the AC system's service ports in your car. Hoses up to 5' (60 inches) are usually sufficient for most persons.
  • Look for an AC hose composed of a particular material to withstand corrosion or impact damage. The hoses will be necessary for a while.
  • Look for AC Hose Fittings that help the tool to be easier to use and more efficient, such as valves, automatic connections, and other features.
  • Refrigerant hoses for automobiles are commonly available at auto parts retailers, both online and off. Make sure to evaluate the pricing provided by various vendors.

Buying Guide for Short Refrigerant Hoses

Making a list of the goods you want to buy and analysing all the pros and cons before making a decision is the best approach to make the most of your time. This post can offer numerous suggestions that will assist you in accomplishing this and preventing the purchase of the incorrect item. Only buy something once you've completed reading this post if you're in a rush. Here are some factors you must consider before purchasing a product: You may choose wisely when you are buying a product with these considerations.

  • Price: What are your financial limits for purchasing your new product? The most expensive choice is yours if cost is not a concern. However, if money is short, it's crucial to pick one that matches your requirements and spending limit.
  • Durability: Before purchasing, consider how long the short refrigerant hoses will survive. Buying a product that will break down after only a few uses is never preferable to investing in something that will endure longer.
  • Before purchasing, one should think about the quality of short refrigerant hoses build quality. High-quality materials will be employed to produce and develop an excellent product.
  • Brand: A product's brand reputation is crucial since it reveals a company's dependability and commitment to customer satisfaction.


Although it may seem simple, it's crucial to remember that you should look at something other than something's price and conclude that it needs to be more pricey. Instead, you must compare costs amongst suppliers and evaluate who gives more value for money! For instance, if you discover a comparable product for $10 less somewhere else, it could be wiser to purchase from that vendor than the first one you came on!

Product Type

You can purchase a variety of short refrigerant hoses. Some are elementary, while others are sophisticated. Before making a purchase, you must ascertain the merchandise you require. For instance, a basic product is perfect if you want something straightforward. But let's say you want something more sophisticated. The more expensive one is preferable because it will offer extra functions.


When selecting the best short refrigerant hoses for you or another person, consider the product size because every user has different needs. For instance, someone using large tools or products would require something larger than someone using smaller things or gadgets. Therefore, it's crucial to consider each product's size before buying it to ensure it will satisfy all your size needs and specifications.


You should purchase a branded product because it has already been tried and true by numerous consumers. Additionally, brands offer warranties on their short refrigerant hoses, ensuring that they will replace or repair your new item without difficulty if anything goes wrong while the warranty still covers it.


The lifespan of short refrigerant hoses is something you should think about. You must purchase something that will meet your demands for many years. A durable product will suit your purpose well if many individuals have used it without experiencing any problems.

Ease of Usage

Please make sure a short refrigerant hose is simple to use before purchasing it so that you don't have any problems using it. While some short coolant hoses appear fantastic, their complexity may exceed your proficiency or knowledge. Ensure the item is user-friendly so everyone, including those with little expertise, can use it conveniently and without difficulties or inconveniences.