Selecting the right compression union fittings is crucial for ensuring secure and leak-free connections in your plumbing systems. These fittings are essential for joining pipes and offer a reliable solution for various applications, from DIY projects to professional installations. Investing in quality ensures durability and peace of mind.
Looking for the best Compression Union Fittings?
Discover now our comparison of the best Compression Union Fittings. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Compression Union Fittings are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Compression Union Fittings in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
No. 1
Taiidaues 46pcs Brass Compression Tube Pipe Fittings Assortment Kit,1/8" 3/16" 1/4" 5/16" 3/8" 1/2" OD...
- 【High Quality】 - Our brass compression fittings kit is made of high-quality brass, with strong wear, corrosion resistance, high compressive strength, durability, low magnetic permeability and high temperature ductility
- 【Widely Use】- Brass compression tube fittings meet specifications and standards of ASA, ASME asn SAE. Good sealing and repeatability, temperature and pressure resistance. Perfect fit for oil, gas, water and other non-corrosive or corrosive pipeline...
- 【Working Pressure & Temperature】 - 2000 PSI maximum working pressure, temperature range -65°F to +250°F (-53°C to +121°C)
- 【You Will Get】- Brass air line compression fittings contain: 1/8"-4 pcs, 3/16"-4 pcs, 1/4"-4 pcs, 5/16"-4 pcs, 3/8"-4pcs,and 1/2"-2 pcs compression coupling. 1/8"-4 pcs, 3/16"-4 pcs, 1/4"-4 pcs, 5/16"-4 pcs, 3/8"-4 pcs,and 1/2" -4 pcs compression...
- 【Tips】- These copper tubing fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories
No. 2
108pcs Brass Compression Tube Pipe Fittings Assortment Kit, 1/8" 3/16" 1/4" 3/8" 5/16" 1/2" OD Compression...
- PREMIUM QUALITY: The Brass compression fittings are made of high-quality CA360 brass, with corrosion resistance, high-temperature ductility, low permeability and long service life.air hose fittings kit type: 1/8" 3/16" 1/4" 3/8" 5/16" 1/2"
- 108PCS Brass compression fittings kit: union compression fittings 1/8" 10PCS,1/4" 8PCS ,3/16" 4PCS, 5/16" 4PCS, 3/8" 4PCS,1/2" 2PCS. Sleeves Ferrules:1/8" 20PCS, 3/8"10PCS, 1/2"10PCS,1/4" 16PCS,3/16"10PCS,5/16" 10PCS
- EASY TO INSTALL: Our air fitting kit quick disconnect, need to use tools to fix loose parts to handle in tight places, so that use will be more firm and not easy to fall off,plays a sealing role
- WIDE APPLICATION: Brass compression fittings kit meet specifications and standards of ASA, ASME asn SAE. Temperature and pressure resistance,good sealing and repeatabilityUse for oil, gas, water and other non-corrosive or corrosive pipeline systems, no...
- PRESSURE RANGE: Brass compression tube fittings pressure resistance, not easy to trip. - 2000PSI maximum working pressure. Temperature Range: -65° F to +200° F. Note: see tubing manufacturer’s recommendations for pressure and temperature mutations
No. 3
Ailbiuko 53 PCS DOT Brass Compression Air Brake Nylon Tubing Fittings,Straight Union Fitting Assortment Kit...
- STRAIGHT UNION KIT: The dot air compression union fittings kit package includes 53pcs : 4 pcs 1/8" x 1/8" compression tube union, 6 pcs 1/4" x 1/4" compression tube union,6 pcs 3/8" x 3/8" compression tube union,2 pcs 1/2" x 1/2" compression tube union...
- PREMIUM MATERIAL: Our DOT dot air compression union fittings kit is made of high-quality CA360 brass, Meet D.O.T FMVSS 571.106, Air Brake system Requirements, with corrosion resistance, high-temperature ductility, and low permeability. Great for long-time...
- PRESSURE RANGE: Air line fittings pressure resistance, not easy to trip. Air brake fittings working pressure from vacuum max to 300 PSI. Temperature Range: -65° F to +200° F(Note: see tubing manufacturer’s recommendations for pressure and temperature...
- EASY TO INSTALL: Our dot air compression union fittings kit quicks disconnect push tubing in, you need to use tools to fix loose parts to handle in tight places so that use will be firmer and not easy to fall off. And wrapped the additional teflon tape we...
- TYPICAL APPLICATION: Air brake fittings assortment kit can be used with air systems, copper tubing in airline brake systems, which is perfect for automotive car or truck repair, air operated seats, operating gauges, air horns, industrial workshops, air...
SaleNo. 4
Legines Brass Compression Tube Fitting, Comp Union Coupling Assortment Kit...
- Kit contains 6sizes: 1/8"(2 pcs), 3/16"(10 pcs), 1/4"(4 pcs), 5/16"(2 pcs), 3/8"(2 pcs) and 1/2" (2 pcs)compression coupling, total 22pcs.
- Each assortment contains a specific collection of fast moving fittings that should be kept on hand when working with automotive hydraulic braking systems.
- This compression union assortments are designed for specialty and general repair shops.
- Meets specifications and standards of ASA, ASME asn SAE.
- Compression unions for joining copper, brass, or aluminum tubing in low-pressure applications
No. 5
Taiidaues Brass Compression Tube Fitting, 10 PCS 3/16" OD x 3/16" OD Compression Union Connectors & 10 PCS...
- You Will Get - 10 pcs 3/16" OD x 3/16" OD Compression brass tube fittings, 10 pcs 3/16" OD Brass Compression Sleeves Ferrules. Compression Tube Fitting mainly consists of a fitting body with a 24 degree tapered hole, a ferrule with a sharp inner edge, and...
- High Quality Brass - Our 3/16" compression fitting kit is made of high-quality brass, with strong wear，corrosion resistance, high compressive strength, durability, low magnetic permeability and high temperature ductility
- Widely Use- Brass compression tube fittings meet specifications and standards of ASA, ASME asn SAE. Good sealing and repeatability, temperature and pressure resistance. Perfect fit for oil, gas, water and other non-corrosive or corrosive pipeline systems...
- Working Pressure & Temperature- 2000 PSI maximum working pressure, temperature range -65°F to +250°F (-53°C to +121°C)
- Tips- These copper tubing fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories
No. 6
46 PCS Compression Fittings, Brass Compression Tube Pipe Fittings Assortment Set...
- 【Excellent Brass Material】- Wear-resistant, corrosion-resistant, non-rusting, high sealability, high compression strength, low magnetic permeability and high temperature ductility.
- 【Working Pressure & Tempreature】- 2000PSI maximum working pressure, temperature range -65°F to +250°F (-53°C to +121°C)
- 【46pcs Brass Compression Fittings】- The Package of Brass air line compression fittings include: 1/8"-4 pcs, 3/16"-4 pcs, 1/4"-4 pcs, 5/16"-4 pcs, 3/8"-4pcs,and 1/2"-2 pcs compression coupling. 1/8"-4 pcs, 3/16"-4 pcs, 1/4"-4 pcs, 5/16"-4 pcs...
- 【Application】- Perfectly for oil, gas, water and other non-corrosive or corrosive pipeline systems, no need for welding and flaring tools, easy disassembly, installation and maintenance, etc.
- 【 Profetional Manufacturers 】: Made by Profetional Factory, Materials and products was strictly tested before leaving the factory, This brass compression tube fittings Meet the specifications and standards of ASA, ASME asn SAE
No. 7
QWORK 46pcs Brass Compression Tube Fittings, 1/8" 3/16" 1/4" 5/16" 3/8" 1/2" OD Straight Union Coupling...
- Material: Crafted from robust brass, offering exceptional wear and corrosion resistance; engineered for long-lasting durability and performance.
- Application: Suitable for use in various pipeline systems including oil, gas, water, and other non-corrosive or corrosive environments; not for potable water use.
- Pressure and Temperature Rating: Capable of withstanding a maximum working pressure of 2000 PSI and a temperature range from -65°F to +250°F (-53°C to +121°C).
- Easy Installation: No welding or flaring tools required for installation, disassembly, or maintenance.
- Comprehensive Kit: Includes 46 pieces of assorted compression couplings and sleeves ferrules in various sizes.
No. 8
Taiidaues 1/2 Inch Compression Fitting,10 Pcs Brass Compression Tube Pipe Fittings, 1/2" OD X 1/2" OD...
- 【You Will Get】- 10 pcs 1/2" OD x 1/2" OD compression union fittings, 10 pcs 1/2" OD Brass Compression Sleeves Ferrules. Compression Tube Fitting mainly consists of a fitting body with a 24 degree tapered hole, a ferrule with a sharp inner edge, and a...
- 【High Quality Brass】 - Our 1/2" compression fitting is made of high-quality brass, with strong wear，corrosion resistance, high compressive strength, durability, low magnetic permeability and high temperature ductility
- 【Widely Use】- 1/2 inch compression fitting meets specifications and standards of ASA, ASME asn SAE. Good sealing and repeatability, temperature and pressure resistance. Perfect fit for oil, gas, water and other non-corrosive or corrosive pipeline...
- 【Working Pressure & Temperature】- 2000 PSI maximum working pressure, temperature range -65°F to +250°F (-53°C to +121°C)
- 【Tips】- These 1/2 brass compression fitting contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories
No. 9
Legines Brass Compression Tube Fitting, Union, 1/4" OD x 1/4" OD Coupler, Pack of 2
- Three piece construction - nut, sleeve and body with attached insert Use with copper, brass, aluminum, or plastic tubing
- Manufactured for low and medium pressure tubing connection work where excessive vibration or tube movement is not involved.
- Use with copper,aluminum and thermoplastic tub-ing.Not recommended for steel tubing.
- Not recommended for application using gas eous media.
- Meets specifications and standards of ASA, ASME asn SAE.
SaleNo. 10
MuHize High Pressure Compression Fitting Kit - 3/16 Inch Tube Union, Brass Compression Connectors for...
- 【Easy to Install】: MuHize compression fitting is much easier than replacing, bending, and flaring new lines. Compression fittings for copper pipe are easy to disassemble no flaring tool is required. Just make sure the cuts to the original lines are...
- 【Rust-Proof Reliability】: MuHize brass compression union fitting is built to last, protecting your brake lines from corrosion in harsh conditions.
- 【Versatile Compatibility】: This high-quality brass union works seamlessly with copper, brass, aluminum, or plastic tubing, suitable for most automotive applications.
- 【Size & Package Includes】: 3/16" Tube OD x 3/16" Tube OD. MuHize compression Tube Fitting mainly consists of a fitting body with a 24-degree tapered hole, a ferrule with a sharp inner edge, and a nut for compression(pack of 8).
- 【Working Principle】: MuHize compression Tube Fitting is to compress the ferrule by thread interlocking, and the two ends of the inner diameter of the ferrule tightly wrap the tube due to radial shrinkage, which plays a sealing role and realizes the...
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Last update on 2026-04-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Compression Union Fittings
Material Composition
When choosing a compression union fitting, the material is a primary consideration. Common options include brass, stainless steel, and plastic. Brass offers good corrosion resistance and is suitable for water and various gases. Stainless steel provides superior strength and excellent resistance to corrosion, making it ideal for harsher environments or high-pressure applications. Plastic fittings are lightweight, cost-effective, and resistant to certain chemicals, but may not be suitable for high temperatures or pressures.Size and Compatibility
Ensure the fitting's size matches the outer diameter of the pipes you intend to connect. Compression fittings are designed for specific pipe sizes, and using the wrong size will result in leaks. Always verify the compatibility of the fitting with the type of pipe material (e.g., copper, PEX, PVC) and the intended fluid or gas.Pressure and Temperature Ratings
Check the maximum pressure and temperature ratings of the fitting. These specifications are critical for safety and performance. Select a fitting that can comfortably exceed the expected operating pressure and temperature of your system to prevent failure and ensure longevity.Frequently Asked Questions
What is a compression union fitting?
A compression union fitting is a type of pipe fitting used to connect two pipes of the same size. It works by using a compression nut and a ferrule that compresses onto the pipe when the nut is tightened, creating a watertight seal without the need for soldering or adhesives.
Are compression fittings suitable for high-pressure systems?
Yes, many compression fittings are designed for high-pressure applications. However, it's essential to check the specific pressure rating of the fitting and ensure it meets or exceeds the requirements of your system. Materials like stainless steel often offer higher pressure capabilities.
Can I use compression fittings outdoors?
The suitability of compression fittings for outdoor use depends on the material and the environment. Brass and stainless steel fittings generally offer good resistance to outdoor conditions and corrosion. Plastic fittings may degrade over time when exposed to UV light and extreme temperatures.
How do I install a compression union fitting?
Installation typically involves sliding the compression nut and ferrule onto one of the pipes. Then, insert the second pipe into the fitting and slide the ferrule and nut into place. Tighten the nut firmly with a wrench to create the seal; avoid over-tightening, which can damage the fitting or pipe.
