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

【Product Name】Straight Push-in Connect Fittings

【Material】Copper and Plastic

【Size】1/4" Tube OD x 1/8" NPT Thread，Notice - NPT Thread Size is a Nominal Pipe Size, and it Does Not represent the actual diameter

Type: Compression Union

Tube Size:3/8" OD

Materies: BRASS

Type: Compression Union

Tube Size:1/4" OD

Materies: BRASS

【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

Type: Compression Union

Tube Size:3/8" OD

Materies: BRASS

Type: Compression Reducing Union

Tube Size:3/8" OD x 5/16" OD

Package Content : 5 PCS(Include Nut And Ferrule)

★ 【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.

【Product Name】Straight Tube Fittings Push Lock

【Material】Plastic

【Size】1/4" Tube OD x 1/4" Tube OD

Type: Compression Reducing Union

Tube Size:1/2" OD x 3/8" OD

Package Content : 5 PCS(Include Nut And Ferrule)

【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.

【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

✅ 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.

【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.

Type: Compression Reducing Union

Tube Size:3/8" OD x 1/4" OD

Package Content : 5 PCS(Include Nut And Ferrule)

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.

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.

✔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

✅[EXCELLENT MATERIAL]: Made of quality PU & plastic.High pressure resistance,can withstand strong pressure without tripping out

✅[PUSH TO CONNECT FITTING TYPE]: 1/2",3/8'',5/16'',1/4'', 5/32", fit for 12mm 10mm 8mm 6mm 4mm OD polyethylene pipe, PU/ PA/ PE/ PVC and nylon tube

✅[QUICK CONNECTION AND REMOVE]: Simple push in design for connecting to the tube and provide secure connection. It can be easily removed by pressing the release ring

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

Type: Compression Union

Tube Size:3/16" OD

Materies: BRASS

【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.

Type: Standard 3/8" Tube OD (Compression) male to 1/4" inch NPT national pipe thread male.Compression nuts and ferrules included.5pcs

Reducing adapter for different size tube pipes or fittings,Fitting connects to tubing end and NPT male connects to Standard National Pipe Thread.

Tube OD Compression to NPT tube adapter for converting Standard National Pipe Thread (NPT) pipe to Aluminum, Plastic, and Copper straight compression thread pipe Tubing.

Size: 3/8 inch OD copper tube connector is suitable for rigid pipes such as copper and aluminum pipes and is suitable for rigid pipes with a 3/8 inch OD; not suitable for hoses

Package Contents: there are 4 pieces copper tube connectors, the quantity is sufficient to meet your home usage and replacement needs, you can also share them with your neighbors or relatives

Tear and Wear Resistant: made of quality brass material, these line pressure fittings are reliable and sturdy, will not easy to break, tear and wear resistant, which can serve you for a long time

HVAC & Refrigeration tubing is measured by the outside diameter or O.D. of the pipe/tube. See description below for more details. Change your pipeline direction with our 90 Degree 99.9% Pure Copper Elbow Ideal for Potable Water, Air Conditioning, and Refrigeration Systems (both Residential and Commercial Systems

Copper to Copper Solder Piping Connection Fittings - 494 PSI Maximum Working Pressure - For Applications within a temperature range of -20° to 400°F

Lead-Free, Durable, & Low-Maintenance, Resists Corrosion & Scaling

Reducer Adapter: Premium solid brass with thicker wall, more durable than iron and iron galvanized pipe fittings, 1/4" NPT male pipe x 3/8" NPT female pipe

Reducing Hex Nipple: Reducing hex nipple for connecting two threaded pipes with different diameters. Male National Pipe Taper (NPT) threads for connecting to female threaded pipes

Hex Bushing: Has a 3/8” male NPT threaded on one end and a 1/4” female NPT threaded on the other for connecting a female and a male pipe or fitting with different diameters

Material & Construction:High quality Aluminum and Brass and nitrile.Nickel plated brass fitting guards against corrosion.

Installation: Easy to install,no flaring tool required.Double O-ring compression style fitting,the tubing also can be removed if needed.

Temperature Range:-40℉ to 140℉,Ratings ASTM F1282 and ASTM F1974.

HVAC & Refrigeration tubing is measured by the outside diameter or O.D. of the pipe/tube. See description below for more details. Ideal for Potable Water, Air Conditioning, and Refrigeration Systems (both Residential and Commercial Systems – Suitable for Aboveground Piping

Connects 2 copper pipes to diverge flow to a different direction – 581 PSI Maximum Working Pressure

Lead-Free, Durable, & Low-Maintenance, NO CORROSION

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 valve 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