Best Adapter Compression Union Straights in 2026

★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

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.

【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 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.

Three piece construction - nut, sleeve and body with attached insert

Use with copper, brass, aluminum, or plastic tubing

Standard fittings use short nuts

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

Air Line Quick Disconnect : Air And Water Pressure Range: 0-1 Mpa145 Psi Max Pressure:1.5 Mpa/ 217 Psi/15 Bar Temperature Range 0-60°C | 32～140°F Applicable Tube: Pu/Nylon/Soft Pe Air Line Fittings

Pushlock Air Fittings And Water Pressure Range: 0-1 Mpa145 Psi Max Pressure:1.5 Mpa/ 217 Psi/15 Bar Temperature Range 0-60°C | 32～140°F Applicable Tube: Pu/Nylon/Soft Pe Airline Fittings

Easy To Install This Quick Connect Tube Fittings Is Available In Various Styles And Models . Each Model To Serve Its Purpose. All Models Of Push Lock Fittings Are Designed To Suit Your Pneumatic Piping Needs Perfectly

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.

Designed To Withstand A Wide Range Of Temperatures, From -20°c To 120°c (-4°f To 248°f), Ensuring Durability And Reliability In Any Environment.Our Quick Connect Fittings Are Compatible With Various Types Of Tubing, Including Pu, Nylon,

Easy Installation: Featuring A 1/4 Quick Connect Fittings Size, These Fittings Ensure A Quick And Effortless Installation Process. No More Wasting Time On Complex Procedures; Simply Connect And Disconnect With Ease. Air Hose Quick Fittings:

Push Lock Fittings: For Added Security, Our Quick Connect Fittings Feature Push Lock Mechanisms, Ensuring A Tight And Reliable Seal. Quick Connect Tube Fittings: Designed Specifically For Tube Applications, Our Quick Connect Fittings Allow For Swift And Effortless Connections.

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.

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

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.

The product is manufactured in China

The product is highly durable and easy to use

Easy installation and easy handling

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

Compression tube connections on both ends

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

Union for connecting and disconnecting two pipes more easily than couplings

Fitting connects to tubing on both ends

Type 304 stainless steel for higher strength and greater corrosion resistance

Union for connecting and disconnecting two pipes more easily than couplings

Fitting connects to tubing on both ends

Type 304 stainless steel for higher strength and greater corrosion resistance

SIZE - 1/2" Tube OD x 1/2" 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.

SIZE - 1/4" Tube OD x 1/4" Tube OD x 1/4" 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 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

👉【PREMIUM MATERIAL】: Our dot air brake fitting assortment is made of high quality CA360 brass, meets D.O.T FMVSS 571.106 and Air Brake System Requirements. With corrosion resistance, high temperature ductility and low permeability. Long service use, dot air brake fitting type: 1/8" 1/4", 3/8", 1/2", 5/8" .

👉【EASY TO INSTALL】: Our dot air line kit quicks disconnect simply push tubing in, 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. And pieces that contain a threaded end already have sealant pre applied to provide a secure connection.

👉【TYPICAL APPLICATION】: Air brake fittings assortment kit can be used with air systems, copper tubing in air lines brake systems, which is perfect for automotive car or truck repair,air operated seats, operating gauges, air horns, industrial workshops, air brake connections,towing machine hose connection and air brake connections or lawn mower repair.

Made of brass material and conform to DIN 2353, ISO 8434-1, and DIN EN 3851 standards. Extensively used in high working pressure and temperature applications.

Consists of a fitting body, nut and sleeve. The sleeve provides extra sealing capability.

Ensure an excellent and reliable sealing in high-pressure applications with strong mechanical grip design. Easy to use, fewer leak paths, dampen vibrations, ease of use and installation, and high durability.

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.