Best 10 Compression Union Fittings in 2026

INSTALLS IN SECONDS: Repair with no special tools, soldering, crimping, or glue; Just push to create a quick watertight union with SharkBite pushfit connectors

VERSATILE: SharkBite plumbing fittings fit copper, CPVC, and PEX pipe and connect all 3 types in any combination

LEAD-FREE: Made of high-quality forged DZR brass that is lead-free. Ball valves, shutoffs, and compression fittings, are safe for potable water lines

Union fitting for connecting and disconnecting two pipes more easily than with couplings

Socket openings on both ends for connecting two male pipes

PVC for strength and resistance to chemicals and corrosion, and an EPDM seal for resistance to oil, water, and some solvents

Half union for connecting and disconnecting two tubes more easily than with a coupling

45-degree flare head tube connection on one side and a male NPT connection on the other

Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability

Type: Compression Union

Tube Size:3/8" OD

Materies: BRASS

★WATER&FOOD USE MATERIALS: Our RO Fittings are made from safe,non-toxic materials.They are widely used for Countertop/Undersink RODI system,plumbing or drip irrigation System etc

★SIZE&TUBE COMPATIBLE WITH:1/4" Quick Connect fitting Size;Fits standard 1/4 RO Tubing used on most Water purification systems ( check your tube size carefully before order)

★EASY INSTALLATION: New generation Non-Locking Clip technology offers an easy DIY installation without tools required, Just Push in to Connect.

1/4" x 1/4" Tube push fit straight quick connect

Tube Quick Connect Push Fit Water Filters

Union Elbow Quick Connect

High quality brass for leak-proof reliability

Our brake line unions are made with unmatched superior quality

Made of durable brass which is resistant to corrosion from salt that can be used on roads in the winter

Type:Push In Male Connector. Size:1/4” od tubing 1/4”NPT. Weight:18.5g od tubing air fitting quick release air line fittings

Fluid Admitted:Air, Vacuum, air fittings (No Freezing)

Working Pressure:0-1.0mpa | 0-150psi. Proof Pressure:1.5.Mpa | 150 psi push fittings tube coupler airline quick connect

Quick installation, simple and flexible, space-saving.

The tube fitting comes in a wide variety of models to meet all your needs in pneumatic piping.

Even after installation, the direction of tubing can be changed freely.

★ 【Material】: Heavy Duty Brass,strong and durable. Dual couplings for joining two tubes of the same diameter(OD: Outer Diameter).

★ 【Firm And Durable】: Litorange Brass for corrosion resistance, high temperature ductility and low magnetic permeability.

★ 【Function】: Union for connecting and disconnecting two tubes more easily than with a coupling

【Product Name】Direct push reducing hose fittings

【Material】Plastic

【Size】5/16" (8mm)Tube OD x 1/4" (6.35)Tube OD

Made of high-quality plastics and brass for durable use

Type: Quick Connect Fitting Connector

Advantages: Easy installation and disassembly, good sealing performance

Quick connector 3/8" x 1/4" Tube push fit Reducing Straight Union,pack of 10.

Connect and disconnect quick and easy without any other tools,100% leak free, 100% Re-useable

Material: POM(Polyoxymethylene), Polyethylene Plastic Water Tube Fitting

Reducing straight union for connecting and disconnecting two inline pipes of different diameters more easily than couplings

Accepts nylon and polyurethane tube fittings

Made of acetal copolymer plastic for low moisture absorption and high tensile and flexural strength

Type: Straight Union Same Diameter

Designed for Polyurethane or Nylon tubing Quick and Reliable connections

Reusable: Multiple connections/disconnections

Type:Push in fitting/Push to connect /Size:4mm Straight Union Connector

Fluid Admitted:Air Vacuum Water (no freezing)

Working Pressure:0-1.0MPa | 0-150psi/Applicable Tube:PU / PA / PE / PVC

1/4 Union Straight Push to connect fittings Fluid Admitted: Air, Water, Steam ;Pressure: 2MPa | 290psi/ Applicable: Pipe PU/NYLON/Soft PE; Working Temperature:-20°C—120°C | -4°F—248°F

1/4 Push connectors Nickel Plated Brass - corrosion resistance, ductility at high temperatures, and low magnetic permeability; Seal: O-ring FKM(Viton)

These 1/4 quick connect fittings work great ,available in various styles and models ,good to suit your pneumatic piping needs perfectly, easy to connect and disconnect, a quick fix to your leaking problems.

Three piece construction - nut, sleeve and body with attached insert Use with copper, brass, aluminum, or plastic tubing

High Pressure Resistance,Temperature Resistance

Sealability and good repeatability,Easy to disassemble no flaring tool required

Made of stainless steel 304, heavy duty, durable and corrosion resistant.

1/4" outer diameter tube

Fittings for connecting and extending stainless steel, copper, rigid and semi-rigid plastic tubing

✔Tee Union Adapter: 3/8” male and female compression fittings x 1/4" tube quick connect, and two 1/2" NPT converter fittings.

✔Two Extra Converter Fittings: Fitting A : 1/2" male NPT and 3/8" female NPT threaded connections; Fitting B: 3/8" male NPT and1/2" female NPT threaded connections.Allows to connect both 1/2" and 3/8" water supply.

✔Rough Brass Constructions: Full copper material to prevent leakage, strong and long lasting life time

Thru-Bulk Bulkhead Fittings is connect with 1/4" ID hose with the same size.Barbed fitting for a tight seal on hoses.

TIPS:The plastic bulkhead hose barb fittings can hold -9 °F to 175 °F temperature, but it's not resistant to oil.

Made of PP Polypropylene plastic, no toxic and crack.

Material: Brass For Corrosion Resistance, Ductility At High Temperatures, And Low Magnetic Permeability

Widely Used: Widely Used In The Fuel/Air/Lquid/Oil/Gas/Vacuum Lines

Features: Good Airtightness, Pressure Resistance, Not Easy To Trip,NPT thread size does not actual diameter, it is only nominal pipe size.

The product is manufactured in China

The product is highly durable and easy to use

Easy installation and easy handling

Compression union

Brass material lasts long

Not for use in potable drinking water applications

Available in many different styles, including elbows, union, and tees

A large variety of tube diameters and pipe sizes available

Conveniently packaged in diverse piece counts to assist with both small and large projects

【Package Includes】: 10 PCS 3/8" Compression x 3/8" Compression Union with A Sealing Tape.

【Lead Free Brass】: Heath and environment friendly material. Made of Lead Free Brass. Lead free brass is for both potable and non-potable water.

【Superior Material】: The 100% heavy duty brass tube fitting is firmer than iron and iron galvanized products, more robust and durable than castings.

SIZE - 5/16" Tube OD x 5/16" Tube OD, 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.

MATERIAL - Made of high-quality brass, with strong wear and corrosion resistance, high compressive strength, durability, low magnetic permeability and high temperature ductility.

Use - Suitable for oil, gas, water and other non-corrosive or corrosive pipeline systems, temperature and pressure resistance, good sealing and repeatability, no need for welding and flaring tools, easy disassembly, installation and maintenance, etc.

5/16" Brass compression unions - Pack of 3

These compression unions are used on fuel, transmission, oil, return power steering line and coolant lines

Works with steel, copper, aluminum & nylon tubing material or combinations of these together

UNION COMPRESSION FITTING: Made of brass, has tube connections & suitable for indoor air application. Brass sleeves feature a compression-type connection

THREADED CONNECTION that can be screwed to connect tubes more easily than with a coupling. Can help eliminate the need to flare, solder, or prepare tubing before assembly

MADE OF BRASS for corrosion resistance, ductility at high temperatures & low magnetic permeability. Use with annealed copper, aluminum, and thermoplastic tubing

Union for connecting and disconnecting two pipes more easily than couplings

Push-to-connect fitting connects to pipes or tubing on both ends

Made of stainless steel for resistance to scaling and corrosion