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

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.

★ 【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.

★ 【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

【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: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

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.

✔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.

304 Stainless Steel

Coupler Ferrule Mini Inner Dia : 10 mm

Adapter for connecting pipes or fittings of different types.

Type: Standard 3/8" Tube OD (Compression) male to 3/8" Tube OD (Compression) male.Compression nuts and ferrules included.5pcs

Reducing adapter for different size tube pipes or fittings,Both fitting connects to tubing end.

Tube OD Compression Straight Coupling Adapter for converting Aluminum, Plastic, and Copper straight compression thread pipe Tubing.

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.

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

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