Types of Compression Fittings

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Compression fittings are essential components in plumbing, air and fluid transfer systems. They are used to join two pipes, tubing or hoses and provide a tight seal that can withstand different levels of pressure. There are many different types of compression fittings available on the market today, each with its own unique features and benefits. Read on to know the difference in design and functionality!

Single Ferrules

3_8 Equal Compression Coupler

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Single-ferrule compression fittings are some of the most common types of compression fittings used in plumbing and industrial applications. They consist of a single ferrule, also known as a sleeve, which is slid over the end of the pipe or tube. The ferrule is then tightened onto the pipe or tube with a nut and a compression ring. This type of compression fitting allows for a secure connection that is easy to assemble and disassemble. They are also reusable, making them ideal for use in areas where frequent disconnection and reconnection of pipes may be required.

Double Ferrules


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Double ferrule fittings are comprised of two main parts – a body or nut and a ferrule. The body of the fitting typically contains a female thread, while the ferrule has a metal sleeve that is pushed onto the tube end. As the nut is tightened, the metal ferrule compresses the tube’s end against the body, forming a secure seal.

The double ferrule system ensures an even distribution of pressure on the tube, which in turn helps to prevent leaks. Additionally, these fittings are able to withstand higher pressure ratings than single-ferrule compression fittings, making them ideal for high-pressure systems. 

Union Connectors



Union connectors are a type of compression fitting that can be used to quickly and easily connect two pipes together. The connector is made up of two halves that fit together using a threaded union nut. This allows the union connector to provide a strong, leak-proof connection without having to glue, solder, or weld the pipes. Union connectors are often used in applications where the connection needs to be able to be quickly and easily broken down, such as in some plumbing applications.

Elbow and Tee Connectors



Elbow and tee connectors are compression fittings that allow you to connect a tube or pipe in a 90-degree angle. The connectors consist of two female ends that fit together to create a right-angle connection. These fittings are ideal for tight spaces where straight connections are not possible. They are also used to change the direction of fluid flow within a system.

The elbow connectors come in two sizes, long radius and short radius. The long-radius elbows have a larger centerline radius compared to the short-radius elbows, which makes them perfect for applications where space is limited. 

The tee connectors have three openings that form a “T” shape, allowing for the connection of two pipes and one outlet. They can be used to split one pipe into two lines or to combine two lines into one line.

Both types of connectors are made from brass, copper, and other metals depending on their application. Additionally, they can be secured with rings, nuts, or clamps. When connecting the fittings, it is important to ensure that the connections are properly aligned, as misalignment could cause damage to the system or lead to leaks. It is also important to use a sealant like Teflon tape or a thread sealant to prevent leakage. 

Swivel Adapters

Vibrant 90 Degree Swivel Adapter Fitting -8AN Female to -8AN Male

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Swivel adapters are a type of compression fitting that is used to change the direction of pipes. They have an adjustable body, allowing the pipe to be connected at different angles. They are made from durable materials such as brass, stainless steel, and aluminum, and can withstand high temperatures and pressures.

Swivel adapters offer several advantages over standard compression fittings. First, they provide a 360-degree rotation for easier installation and connection. This makes them ideal for tight spaces or for applications where flexibility is needed. Additionally, swivel adapters allow for multiple connections without having to modify the plumbing system.


Compression fittings come in a variety of shapes and sizes to meet the needs of any application, from a single ferrule to an elbow and tee connector. Not only do these fittings provide a secure and durable connection, but they also make installation and maintenance easier. By choosing to get your compression fitting from us, you can ensure that your plumbing system will perform optimally and last for years to come. Contact us for the best offers!


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