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

Size: The thread size of 6AN is 9/16-18UNF. OD of brab: 5/16 inch.

Material: Made of aluminum alloy 6061-T6.

Seal: The AN side of the flare is sealed by a 37 degree angle.

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

【Product Name】Straight Push-in Connect Fittings

【Material】Copper and Plastic

【Size】1/2" Tube OD x 1/2" NPT Thread，Notice - NPT Thread Size is a Nominal Pipe Size, and it Does Not represent the actual diameter

Coupling for connecting two pipes with the same diameter in a straight run

Female National Pipe Taper (NPT) threads for connecting to male threaded pipes

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

Type: Compression Union

Tube Size:1/4" OD

Materies: BRASS

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

Tube Quick Connect Push Fit Water Filters

Union Elbow Quick Connect

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

Hex bushing for connecting two pipes with different diameters

1/4" Male NPT threads on one end and 1/8" female NPT threads on the other for connecting pipes with different ends

Legines pipe fittings are made of CA360 or CA377 brass, not ordinary copper alloy, and meet SAE standard, have dryseal threads, forgings & extruded.

★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.

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

1/4"x1/4" Brass Pipe Hose Fitting with NPT Female Thread Straight Hex Nipple Fast Coupler

Good raw material brass, high corrosion resistance, low magnetic characteristics and high temperature ductility

Made with precision process, no leaking and durable, easy to connect and disconnect

【Size】1/2 male to 3/8 male reducer compression fitting is used for connecting two threaded pipes in different diameters. The 3/8 end link to 0.52 inch diameter female; the 1/2 end link to 0.75 inch diameter female.

【Premium Material】The RV faucet adapter is made of solid brass and treated with nickel coating. More sturdy, durable, anti-corrosion, and rust-proof when used.

【Widely Application】Our faucet adapters mainly apply to connect pipes, especially for RV, camper, kitchen, and bathroom faucet hose, widely used in your life. Solve the trouble of inappropriate pipe size in daily life.

Made of high-quality plastics and brass for durable use

Type: Quick Connect Fitting Connector

Advantages: Easy installation and disassembly, good sealing performance

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.

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

【Product Name】Direct push reducing hose fittings

【Material】Plastic

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

Type: Straight Union Same Diameter

Designed for Polyurethane or Nylon tubing Quick and Reliable connections

Reusable: Multiple connections/disconnections

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

【SIZE & NPT THREADS TYPE】: Size: 3/8" NPT x 3/8" NPT Male Threads, OD: 0.65 Inch, ID: 0.44 Inch, Length: 1.18 inch; Note: This hex nipple are NPT threads type, not compression threads, Compression and NPT are two different thread types, Please check if the size fits your needs before your purchase.

【FIRM】: Brass for corrosion resistance, hightemperature ductility and low magneticpermeability, solid brass can withstand up to 100 °C(212 °F); Note: Brass fittings are notallowed by federal law to be installed for potablewater use in the U.S.A. and its territories

【DURABLE】: SUNGATOR selects high quality solidbrass with a longer service life, firm and durable, thishex nipple is not a cast product, meets specifications ASTM B584 and ASME/ANSI B16 for quality assurance

★ 【Material】: Heavy Duty Brass,strong and durable. Size: 1/4" Tube OD x 1/4" inch NPT Male Adapter.

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

★ 【Function】: Fitting connects to tubing on one end and has an NPT male connector on the other. Use with copper, brass, aluminum, or plastic tubing.

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

【Metal Adapter】Our pipe fitting solid brass constructed, strong and wear resistant more durable than iron and iron galvanized pipe fittings. 3PCS- adapter 1/2 inch NPT Male Pipe to 1/2 inch Female Pipe.

【Durable and Steady】Heavy duty brass pipe fitting construction has excellent performance in terms of corrosion resistance, high temperature ductility and low magnetic permeability, solid brass can withstand up to 100 °C (212 °F)

【Widely Application】Adapter for connecting pipes or fittings of different thread types, brass is corrosion resistant and can be used in wet environments. Deeper and smoother threads design makes work easier and more efficient, Easy to use and connected.

✅ SPECIFICATION - Standard brass pipe fitting 3/8" NPT female to 3/8" NPT female coupling adapter for connecting two male threaded pipes with the same diameter in a straight run.

✅ MATERIAL - This pipe coupler is made of high quality durable brass for corrosion resistance, high temperature ductility and low magnetic permeability. Can be used in wet environments; it can also be used with grease, fuels and natural gas, refrigeration, instrumentation and hydraulic systems in low and medium pressure pipe line connections.

✅ EASY INSTALLATION - The deep threads design makes fittings bite better, engaged with the object to enhance fixation, no leaking, not easy to slip. Easier and faster installation.

No tools required,Push fit fittings

Easy to use,Mini quick connect push tee 1/4-Inch OD

Push fit fittings,Quick Connect Fitting 1/4" RO Water System

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.

Product Type —— Adapter(3/8"Male NPTx 1/2"Female NPT) with protective case,for industry connecting pipes or fittings with different end types, diameters, or materials,NPT thread size does not actual diameter, it is only nominal pipe size.

Product Material —— Forging of 304 stainless steel strength and resistance to corrosion.

Working Temperature —— Temperature range from -868 to 1472 degrees F/-500 to 800 degrees c.

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

Size - 1/4" - 1/8", 3/8" - 1/8" , 3/8" - 1/4", 1/2" - 1/4", 1/2" - 3/8", 3/4" - 1/2"

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

Temperature range - Operating temperatures range from -53 to 121 degrees C (-65 to 250 degrees F)

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.