Quick Disconnect Reducers

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45 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Aluminum Quick-Connect Pipe Fittings for Compressed Air

Twist these fittings onto aluminum pipe for quick, sealed connections—no threading, soldering, or welding necessary. Use them to build a compressed air system in half the time it would take to build a copper or steel system. Also known as Unipipe fittings, they’re part of a quick-connect system that’s compatible with pipe from Unipipe, Transair, and Infinity.

Finger tighten the collar on the end of these fittings, then use a wrench for the final quarter turn. The inside of these fittings has a compression ring and O-ring to seal against the pipe. They’re easy to take apart as needed to modify your setup.

Choose fittings with a blue or gray collar for easy identification. Fittings with a blue collar are often used for compressed air systems. Fittings with a gray collar are often used for vacuum systems.

For technical drawings and 3-D models, click on a part number.

Straight Adapters, Female Quick Connect × Male Threaded

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

These adapters have pipe threads on one end to connect to your compressor or other component.

Threaded connections can be taken apart as needed for maintenance and repair.

							Gray Collar
For Pipe OD (A)	Pipe Size (B)	Socket Dp., mm	Lg., mm	Material	Color	Max. Pressure		Each
NPT Threads
1 1/2" (40 mm)	1 1/2	57	81	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	000000

Straight Reducing Adapters, Female Quick Connect × Female Threaded

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

These adapters have pipe threads on one end to connect to your compressor or other component.

Threaded connections can be taken apart as needed for maintenance and repair.

(A)
For Pipe OD	Socket Dp., mm	Pipe Size (B)	Lg., mm	Material	Color	Max. Pressure		Each
Blue Collar
NPT Threads
3/4" (20 mm)	35	1/2	55	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	37	3/4	57	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	0000
1 1/2" (40 mm)	57	1 1/4	80	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
Gray Collar
NPT Threads
3/4" (20 mm)	35	1/2	55	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	0000
1" (25 mm)	37	3/4	57	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	0000
1 1/2" (40 mm)	57	1 1/4	80	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000

Straight Reducing Adapters, Female Quick Connect × Male Threaded

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

These adapters have pipe threads on one end to connect to your compressor or other component.

Threaded connections can be taken apart as needed for maintenance and repair.

(A)
For Pipe OD	Socket Dp., mm	Pipe Size (B)	Lg., mm	Material	Color	Max. Pressure		Each
Blue Collar
NPT Threads
3/4" (20 mm)	35	1/2	49	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	37	1/2	55	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	37	3/4	55	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	1 1/4	81	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
Gray Collar
NPT Threads
3/4" (20 mm)	35	1/2	49	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	0000
1" (25 mm)	37	1/2	55	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
1" (25 mm)	37	3/4	55	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
1 1/2" (40 mm)	57	1 1/4	81	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000

Straight Reducing Adapters, Female Quick Connect × Male Quick Connect

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

Use these adapters with a connector (sold separately) to change the line's size. The male end of these adapters should match the size of the connector. The female end of these adapters will reduce the size of the line. To install, remove and discard the connector's nut, grip ring, and collar. Thread the male end of the adapter into the female end of the connector.

	(B)
For Pipe OD (A)	For Pipe OD	Socket Dp., mm	Lg., mm	Material	Color	Max. Pressure		Each
Blue Collar
3/4" (20 mm)	1" (25 mm)	35	46	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	000000
3/4" (20 mm)	1 1/2" (40 mm)	35	59.5	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	1 1/2" (40 mm)	37	60.5	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
Gray Collar
3/4" (20 mm)	1" (25 mm)	35	46	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
3/4" (20 mm)	1 1/2" (40 mm)	35	59.5	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
1" (25 mm)	1 1/2" (40 mm)	37	60.5	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000

90° Elbow Reducing Adapters, Female Quick Connect × Male Threaded

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9

Threaded connections can be taken apart as needed for maintenance and repair.

(A)
For Pipe OD	Socket Dp., mm	Pipe Size (B)	Material	Color	Max. Pressure		Each
Blue Collar
NPT Threads
3/4" (20 mm)	35	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	000000
1" (25 mm)	37	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	37	3/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	1 1/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
Gray Collar
NPT Threads
3/4" (20 mm)	35	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
1" (25 mm)	37	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
1" (25 mm)	37	3/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
1 1/2" (40 mm)	57	1 1/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000
1 1/2" (40 mm)	57	2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	00000000	00000

Inline Tee Reducing Adapters, Female Quick Connect × Female Threaded

For Use With: Air, Coolant, Nitrogen, Oil
Temperature Range: 0° to 210° F
Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum

Threaded connections can be taken apart as needed for maintenance and repair.

(A)
For Pipe OD	Socket Dp., mm	Pipe Size (B)	Material	Color	Max. Pressure		Each
Blue Collar
NPT Threads
3/4" (20 mm)	35	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	000000
1" (25 mm)	37	3/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	1 1/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
Gray Collar
NPT Threads
3/4" (20 mm)	35	1/2	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1" (25 mm)	37	3/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000
1 1/2" (40 mm)	57	1 1/4	Epoxy-Coated 6061 Aluminum	Black	230 psi @ 72° F	0000000	00000

Wrenches

For Pipe OD	Drive Size, mm	Overall Lg., mm	Head Thick., mm	Material		Each
3/4" (20 mm)	20	172	5	Galvanized Steel	0000000	000000
1" (25 mm)	25	192	5	Galvanized Steel	0000000	00000
1 1/2" (40 mm)	40	245	5	Galvanized Steel	0000000	00000

Measuring Tools

Use measuring tools to mark your pipe’s proper insertion depth so you know if it’s inserted far enough into the fitting.

Max. Dp. Measured, mm	Lg., mm	Wd., mm	Material		Each
160	224	39	Plastic	0000000	000000

Industrial Quick-Disconnect Hose Couplings for Air

A complete coupling consists of a plug and a socket (both sold separately or in a set) that connect and disconnect quickly. Use them if you need frequent access to a line. They are also known as industrial interchange couplings. All Industrial plugs are compatible with any of the Industrial sockets of the same coupling size, regardless of the pipe size or barbed hose ID.

Steel is stronger and more durable than other metals. Zinc-plated steel has fair corrosion resistance and should be used primarily in dry environments. Brass is softer than other metals, so it’s easier to thread together. It has good corrosion resistance. NPTF (Dryseal) threads are compatible with NPT threads.

Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.

For technical drawings and 3-D models, click on a part number.

Plug and Sleeve-Lock Socket Sets, NPTF Male Threaded Pipe

Maximum Pressure: 300 psi @ 72° F
Temperature Range: -40° to 225° F
Specifications Met: Fed. Spec. A-A-59439, ISO 6150/B, except 3/8 Coupling Size Sets: ISO 6150/B

A complete coupling consists of a plug and a socket (both sold separately) that connect and disconnect quickly. Use them if you need frequent access to a line. They are also known as industrial interchange couplings. All Industrial plugs are compatible with any of the Industrial sockets of the same coupling size, regardless of the pipe size or barbed hose ID.

Plugs are also known as nipples.

Sockets have a shut-off valve that stops the flow when the coupling is separated, so air won’t leak from the line.

Sleeve-lock sockets connect by sliding back the sleeve on the socket, inserting the plug, and releasing the sleeve. To disconnect, slide the sleeve back and pull out the plug.

Pipe Size			Plug Tip
Plug	Socket	Coupling Size	Lg.	Dia.		Each
Zinc-Plated Steel Plug and Brass Socket
1/4	3/8	1/4	3/16"	5/16"	0000000	000000

Plug and Sleeve-Lock Socket Sets, NPTF Female Threaded Pipe

Maximum Pressure: 300 psi @ 72° F
Temperature Range: -40° to 225° F
Specifications Met: Fed. Spec. A-A-59439, ISO 6150/B, except 3/8 Coupling Size Sets: ISO 6150/B

Plugs are also known as nipples.

Sockets have a shut-off valve that stops the flow when the coupling is separated, so air won’t leak from the line.

Sleeve-lock sockets connect by sliding back the sleeve on the socket, inserting the plug, and releasing the sleeve. To disconnect, slide the sleeve back and pull out the plug.

Pipe Size			Plug Tip
Plug	Socket	Coupling Size	Lg.	Dia.		Each
Zinc-Plated Steel Plug and Brass Socket
1/4	3/8	1/4	3/16"	5/16"	0000000	000000

Plug and Sleeve-Lock Socket Sets, NPTF Male × Female Threaded Pipe

Maximum Pressure: 300 psi @ 72° F
Temperature Range: -40° to 225° F
Specifications Met: Fed. Spec. A-A-59439, ISO 6150/B, except 3/8 Coupling Size Sets: ISO 6150/B

Plugs are also known as nipples.

Sockets have a shut-off valve that stops the flow when the coupling is separated, so air won’t leak from the line.

Sleeve-lock sockets connect by sliding back the sleeve on the socket, inserting the plug, and releasing the sleeve. To disconnect, slide the sleeve back and pull out the plug.

Pipe Size			Plug Tip
Plug	Socket	Coupling Size	Lg.	Dia.		Each
Zinc-Plated Steel Plug and Brass Socket
1/4	3/8	1/4	3/16"	5/16"	0000000	000000

Plug and Sleeve-Lock Socket Sets, NPTF Female × Male Threaded Pipe

Maximum Pressure: 300 psi @ 72° F
Temperature Range: -40° to 225° F
Specifications Met: Fed. Spec. A-A-59439, ISO 6150/B, except 3/8 Coupling Size Sets: ISO 6150/B

Plugs are also known as nipples.

Sockets have a shut-off valve that stops the flow when the coupling is separated, so air won’t leak from the line.

Sleeve-lock sockets connect by sliding back the sleeve on the socket, inserting the plug, and releasing the sleeve. To disconnect, slide the sleeve back and pull out the plug.

Pipe Size			Plug Tip
Plug	Socket	Coupling Size	Lg.	Dia.		Each
Zinc-Plated Steel Plug and Brass Socket
1/4	3/8	1/4	3/16"	5/16"	0000000	000000