Description
Compression Sleeves Brass
Brass Compression Sleeves are designed for use with compatible compression fittings to help create a secure mechanical seal around tubing. As the compression nut is tightened, the sleeve is compressed around the tube and against the fitting body.
Brass construction provides durability and corrosion resistance for compatible plumbing, water, pneumatic, instrumentation, agricultural, construction, and general fluid-handling applications. Always confirm tubing size, fitting compatibility, media, pressure, and temperature requirements before installation.
Product Highlights
- Brass compression sleeve construction
- Designed for compatible compression fittings
- Installs over compatible tubing
- Compressed by the fitting nut during assembly
- Helps create a secure mechanical tube connection
- Useful for maintenance, repair, and new installations
- Suitable for compatible plumbing and fluid-handling systems
Technical Specifications
| Product Type | Compression Sleeve |
|---|---|
| Material | Brass |
| Component Type | Compression Fitting Sleeve / Ferrule |
| Installation Location | Between Compression Nut and Fitting Body |
| Connection Method | Mechanical Compression |
| Primary Function | Compress Around Tubing to Help Form a Secure Fitting Connection |
Construction Details
The compression sleeve is manufactured from brass and is designed to fit around compatible tubing as part of a compression fitting assembly.
During installation, the sleeve is positioned between the compression nut and fitting body. Tightening the nut forces the sleeve into the fitting seat and around the outside diameter of the tubing.
Proper tube preparation, correct sleeve size, and compatible fitting components are important for reliable assembly and sealing performance.
How a Compression Sleeve Works
Sleeve Fits Over the Tube
The brass sleeve slides over compatible tubing and is positioned behind the tube end before the tube is inserted into the fitting body.
Nut Compresses the Sleeve
As the compression nut is tightened, the sleeve is forced against the fitting body and tubing to help create a secure mechanical connection.
Compression Fitting Components
| Component | Function |
|---|---|
| Compression Nut | Threads onto the fitting body and applies force to the sleeve during tightening. |
| Compression Sleeve | Compresses around the tubing and against the fitting seat. |
| Tubing | Passes through the sleeve and seats inside the compatible fitting body. |
| Fitting Body | Provides the connection point and seating surface for the compression assembly. |
Selecting the Correct Compression Sleeve
| Selection Point | What to Confirm |
|---|---|
| Tube Outside Diameter | Match the compression sleeve to the outside diameter of the compatible tubing. |
| Fitting Compatibility | Confirm the sleeve is designed for the intended compression fitting body and nut. |
| Tube Material | Verify the compression system is suitable for the tubing material being used. |
| Transferred Media | Confirm brass and all fitting components are compatible with the media. |
| Operating Conditions | Verify pressure and temperature requirements for the complete fitting assembly. |
Common Applications
Plumbing & Water Systems
- Water supply tubing
- Plumbing fixture connections
- Appliance supply lines
- Water treatment equipment
- Maintenance and repair work
- Compatible potable-water systems
Industrial & General Service
- Pneumatic tubing systems
- Instrumentation connections
- Agricultural equipment
- Construction applications
- Industrial equipment connections
- Compatible general fluid-handling systems
Brass Compression Sleeve Benefits
Brass compression sleeves provide durable metal construction for compatible compression fitting systems and can be used without soldering or welding.
Their compact design makes compression fittings useful for tubing connections where mechanical assembly, accessibility, and serviceability are important.
Installation & Selection Considerations
- Confirm the compression sleeve matches the tubing outside diameter and fitting size.
- Cut tubing square and remove burrs or surface damage before assembly.
- Make sure the tube is fully inserted into the compatible fitting body before tightening.
- Follow the fitting manufacturer's installation and tightening recommendations.
- Verify brass, tubing, pressure, temperature, and media compatibility before use.

Use the Midland Industries catalog to review compression fitting components, tubing sizes, connection information, dimensional data, and related brass fitting products before ordering.
Midland Industries Catalog PDFNeed Help Selecting a Compression Fitting Component?
Our plumbing, brass fitting, and industrial product specialists can help review your tubing outside diameter, compression fitting configuration, sleeve requirements, material compatibility, and application before you order.
Frequently Asked Questions
What is a brass compression sleeve?
A compression sleeve is a fitting component that fits over tubing and is compressed between the nut and fitting body to help create a secure mechanical connection.
Is a compression sleeve the same as a ferrule?
The terms compression sleeve and ferrule are commonly used to describe the component that compresses around the tubing in a compression fitting assembly.
How do I select the correct compression sleeve size?
Match the sleeve to the tubing outside diameter and verify compatibility with the compression nut and fitting body being used.
Where does the sleeve install?
The sleeve slides over the tubing and is positioned between the compression nut and fitting body.
How does the sleeve create the connection?
Tightening the compression nut forces the sleeve against the fitting seat and tubing, creating the mechanical compression needed for the connection.
Can a compression sleeve be reused?
A compression sleeve deforms during installation. When servicing or rebuilding a connection, inspect all components and follow the fitting manufacturer's recommendations regarding replacement.
Do compression fittings require soldering?
Compression fittings use mechanical compression rather than soldering to make the connection when installed with compatible components.
Where can I find additional compression fitting information?
Use the Midland Industries Catalog PDF linked in the Willy section above to review additional compression fitting information, dimensional data, and related brass fitting products.
Important Ordering & Installation Notes
- Compression sleeve material is brass.
- Confirm the tubing outside diameter and fitting size before ordering.
- Use only with compatible compression nuts, fitting bodies, and tubing.
- Prepare tubing properly and follow the fitting manufacturer's tightening recommendations.
- Verify brass, tubing, media, pressure, temperature, and application compatibility before use.