How to Identify and Measure Fittings
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High-Flow Quick-Disconnect Tube Couplings for Air and Water
- Temperature Range: Acetal Plastic: 32° to 180° F
Polypropylene Plastic: 32° to 160° F - Tubing: Use with soft or firm (Durometer 55A-95A) nylon plastic, polyethylene plastic, polypropylene plastic, polyurethane rubber, PVC plastic or TPE plastic
- Specifications Met: Acetal Plastic: FDA Compliant 21 CFR 177.2470
Polypropylene Plastic: FDA Compliant 21 CFR 177.1520
A spring-free flow path allows more air or water to pass through these tube couplings at lower line pressures than other quick-disconnect couplings. This reduces turbulence, foaming, bubbles, and blockage. They have a shut-off valve that stops the flow when the coupling is disconnected, so air or water won’t leak from your line. Unlike couplings with a button release, these have a safety slide to reduce accidental separation from bumps or drops. They’re often used in laboratories, pharmaceutical facilities, and other sterile environments. All are FDA compliant for direct contact with food.
When you insert the plug into the socket, it’ll connect with a click. To disconnect, slide the latch on the socket and remove the plug.
Polypropylene plugs and sockets are flexible yet tough, so they keep their shape and strength after repeated use. They are more water resistant than acetal plugs and sockets and can be completely submerged.
Caps keep dirt and debris out of plugs—just slide them on the end.
End plugs fit in the end of a socket to keep out dirt and debris.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
| For Plug OD | Coupling Size | Color | Clarity | Max. Pressure | Each | |
Polypropylene Plastic  | ||||||
|---|---|---|---|---|---|---|
| 9/16" | 1/8 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 00000 |
| 9/16" | 3/16 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 11/16" | 1/4 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 11/16" | 3/8 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 1" | 1/2 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 1" | 5/8 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 1" | 3/4 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| Plug OD | Coupling Size | Color | Clarity | Max. Pressure | Each | |
Polypropylene Plastic | ||||||
|---|---|---|---|---|---|---|
| 9/16" | 1/8 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 00000 |
| 9/16" | 3/16 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 11/16" | 1/4 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 11/16" | 3/8 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 1" | 1/2 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 1" | 5/8 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
| 1" | 3/4 | Orange | Opaque | 90 psi @ 72° F | 0000000 | 0000 |
Plastic Luer Lock Tube Couplings for Air and Water
- For Use With: Nylon Plastic: Air, Water
Polycarbonate Plastic: Air
Polypropylene Plastic: Water - Temperature Range: See table
- Tubing: Use with soft (Durometer 40A-65A) PVC plastic or silicone rubber
Made of plastic, these couplings are lighter in weight than metal luer lock couplings. They're a popular choice in labs because of their versatility—they fit any other luer lock plug, socket, syringe, or needle. Quick to attach and detach, they’re often used in lines that are frequently disconnected. They have a compact body for easy installation in tight spaces. Use them in low-pressure applications. These couplings are open-flow style, so there is no shut-off valve to stop the flow when they’re separated.
Polypropylene couplings won’t absorb water and lose strength, even in high-humidity environments. They also stand up to chemicals, including solvents.
Plugs with a locking ring are more secure than those without a locking ring. Give the ring a half turn to lock these couplings in place. You can’t remove the locking ring.
Plugs without a locking ring are quicker to install and remove than those with a locking ring. Also known as luer slip couplings, all they need is a light push to secure. Add a snap-on ring (sold separately) to lock your coupling in place and color code your line.
Note: For a complete coupling, order a plug and a socket.
| Color | Clarity | Max. Pressure | Temp. Range, °F | Pkg. Qty. | Pkg. | |
Polypropylene Plastic | ||||||
|---|---|---|---|---|---|---|
| White | Semi-Clear | 40 psi @ 72° F | 35° to 150° F | 10 | 000000000 | 00000 |
Tie plugs with a tether ring to equipment so they’re always where you need them.
Plugs with a vented tip release fluid and gases trapped below the cap, making them a good choice for vacuum applications.
| Color | Clarity | Max. Pressure | Temp. Range, °F | Features | Locking Ring Included | Pkg. Qty. | Pkg. | |
Polypropylene Plastic | ||||||||
|---|---|---|---|---|---|---|---|---|
Open Tip | ||||||||
| White | Semi-Clear | 40 psi @ 72° F | 35° to 150° F | __ | With Locking Ring | 10 | 000000000 | 00000 |
| White | Semi-Clear | Not Rated | Not Rated | __ | Without Locking Ring | 10 | 000000000 | 0000 |
| White | Semi-Clear | Not Rated | Not Rated | Tether Ring | Without Locking Ring | 10 | 000000000 | 0000 |
| White | Semi-Clear | Not Rated | Not Rated | Vented Tip | With Locking Ring | 10 | 000000000 | 0000 |
Closed Tip | ||||||||
| White | Semi-Clear | Not Rated | Not Rated | __ | With Locking Ring | 10 | 000000000 | 0000 |
Combo cap/plugs close off a plug on one end and a socket with the other. They save space by doing the job of both a cap and an end plug.
| Color | Clarity | Max. Pressure | Temp. Range, °F | Locking Ring Included | Pkg. Qty. | Pkg. | |
Polypropylene Plastic | |||||||
|---|---|---|---|---|---|---|---|
Open Tip | |||||||
| White | Semi-Clear | Not Rated | Not Rated | With Locking Ring | 10 | 000000000 | 00000 |
Push-to-Connect Fittings for Food and Beverage
- Temperature Range: 35° to 140° F
- Tubing: See table
- Specifications Met: See table
Also known as instant fittings, these connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect fittings with a release ring, push on the release ring and pull the tubing out of the fitting.
Polypropylene fittings have excellent impact and abrasion resistance. They meet NSF/ANSI standards for safe use with food. Some are also FDA compliant for indirect contact with food.
Black fittings have excellent UV resistance and are suitable for outdoor environments.
| For Tube OD | Material | Release Ring Color | Max. Pressure | For Tube Hardness Rating | For Tube Hardness | Specifications Met | Each | |
White | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4" | Polypropylene Plastic | White | 150 psi @ 72° F | Firm, Hard | Durometer 50D-90D | NSF/ANSI 51, NSF/ANSI 61 | 00000000 | 00000 |
| 3/8" | Polypropylene Plastic | White | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
| 1/2" | Polypropylene Plastic | White | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
Black | ||||||||
| 1/4" | Polypropylene Plastic | Black | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
| 3/8" | Polypropylene Plastic | Black | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
| 1/2" | Polypropylene Plastic | Black | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
Plugs insert into the push-to-connect end of another fitting.
| Tube Stem OD | Material | Max. Pressure | Specifications Met | Each | |
White | |||||
|---|---|---|---|---|---|
| 1/4" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 51, NSF/ANSI 61 | 0000000 | 00000 |
| 5/16" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 51, NSF/ANSI 61 | 00000000 | 0000 |
| 3/8" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 51, NSF/ANSI 61 | 0000000 | 0000 |
| 1/2" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 51, NSF/ANSI 61 | 0000000 | 0000 |
Black | |||||
| 1/4" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 0000000 | 000 |
| 5/16" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
| 3/8" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 0000000 | 0000 |
| 1/2" | Polypropylene Plastic | 150 psi @ 72° F | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 0000000 | 0000 |
Push-to-Connect Fittings for Plastic Tubing—High-Purity
- For Use With: Air, Nitrogen, Water
- Temperature Range: 32° to 100° F
- Tubing: Use with polypropylene plastic
Also known as instant fittings, these connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect, push on the release ring and pull the tubing out of the fitting. Fittings are produced in a clean room and are double bagged to prevent dirt and moisture from contaminating the inside. They are polypropylene, which has excellent impact and abrasion resistance.
Plugs insert into the push-to-connect end of another fitting.
| Tube Stem OD | Material | Color | Max. Pressure | Each | |
| 1/4" | Polypropylene Plastic | White | 100 psi @ 72° F | 00000000 | 00000 |
| 3/8" | Polypropylene Plastic | White | 100 psi @ 72° F | 00000000 | 0000 |
| 1/2" | Polypropylene Plastic | White | 100 psi @ 72° F | 00000000 | 0000 |
| 4mm | Polypropylene Plastic | White | 140 psi @ 72° F | 00000000 | 0000 |
| 6mm | Polypropylene Plastic | White | 140 psi @ 72° F | 00000000 | 0000 |
| 8mm | Polypropylene Plastic | White | 140 psi @ 72° F | 00000000 | 0000 |
| 12mm | Polypropylene Plastic | White | 140 psi @ 72° F | 00000000 | 0000 |
Luer Lock Tube Couplings for Plastic and Rubber Tubing—High-Purity
- For Use With: Air, Water
- Temperature Range: Nylon Plastic: -50° to 275° F
Polyolefin Plastic: Up to 355° F
Polypropylene Plastic: -5° to 150° F - Tubing: Use with soft or firm (Durometer 50A-95A) polyolefin plastic, PVC plastic, silicone rubber, TPE plastic, or TPU plastic
To prevent contamination, these couplings are cleaned, double bagged, and packaged in a clean room. This makes them a great choice for applications where cleanliness is critical, such as semiconductor manufacturing. Known for their versatility, they fit any luer lock plug, socket, syringe, or needle. They’re quick to attach and detach, so they’re often used in lines that are frequently disconnected. Thanks to their compact body, they fit in tight spaces. Use them in low-pressure applications.
Note: For a complete coupling, order a plug and a socket. Polypropylene couplings resist moisture and chemicals, including solvents. They also stand up to impact and abrasion.
Plugs with a locking ring are more secure than those without a locking ring. Give the ring a half turn to lock them in place. You can’t remove the locking ring.
| Color | Clarity | Max. Pressure | Environmental Rating | Pkg. Qty. | Pkg. | |
Polypropylene Plastic | ||||||
|---|---|---|---|---|---|---|
| White | Semi-Clear | Not Rated | ISO Class 7 | 5 | 00000000 | 00000 |
| Color | Clarity | Max. Pressure | Environmental Rating | Locking Ring Included | Pkg. Qty. | Pkg. | |
Polypropylene Plastic | |||||||
|---|---|---|---|---|---|---|---|
Open Tip | |||||||
| White | Semi-Clear | Not Rated | ISO Class 7 | With Locking Ring | 5 | 00000000 | 00000 |
Easy-Access UV-Resistant Polypropylene Pipe Fittings for Chemicals
- For Use With:
Fittings: Acetic Acid (5%), Calcium Chloride, Hydrochloric Acid (10%), Phosphoric Acid (85%), Salt Water, Sodium Hydroxide, Sulfuric Acid (30%), Water
Gaskets: See Gaskets - Temperature Range:
Fittings: 0° to 150° F
Gaskets: See Gaskets
Also known as manifold flange fittings, these have a clamp-together design that lets you access your line for routine maintenance. Connect the flanged end to another quick-clamp fitting with a clamp and a gasket (all sold separately). Fittings are polypropylene, which resists a wide variety of acids, solvents, and other harsh chemicals. The fittings won’t deteriorate when exposed to the damaging effects of ultraviolet light, so they’re suitable for outdoor use.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
Sealants cannot be sold to Colorado, Connecticut, District of Columbia, Delaware, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, New Hampshire, New Jersey, Northern Virginia, New York, Ohio, Pennsylvania, Rhode Island, or Utah due to local VOC (Volatile Organic Compounds) regulations.
| For Pipe Size | For Flange OD | OD | ID | Thick. | Color | Temp. Range, ° F | For Use With | Each | |
EPDM Rubber | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 2 | 3 19/64" | 2 5/8" | 2.188" | 1/4" | Black | 0° to 300° | Acetic Acid (5%), Calcium Chloride, Hydrochloric Acid (10%), Phosphoric Acid (85%), Salt Water, Water | 0000000 | 00000 |
| 3 | 4 13/32" | 3.719" | 3.188" | 1/4" | Black | 0° to 300° | Acetic Acid (5%), Calcium Chloride, Hydrochloric Acid (10%), Phosphoric Acid (85%), Salt Water, Water | 0000000 | 0000 |
Viton® Fluoroelastomer Rubber | |||||||||
| 2 | 3 19/64" | 2 5/8" | 2" | 1/4" | Black | 0° to 400° | Acetic Acid (5%), Calcium Chloride, Hydrochloric Acid (10%), Phosphoric Acid (85%), Salt Water, Sulfuric Acid (30%), Water | 0000000 | 00000 |
| 3 | 4 13/32" | 3.719" | 3" | 1/4" | Black | 0° to 400° | Acetic Acid (5%), Calcium Chloride, Hydrochloric Acid (10%), Phosphoric Acid (85%), Salt Water, Sulfuric Acid (30%), Water | 0000000 | 00000 |
Plastic On/Off Valves with Push-to-Connect Fittings for Drinking Water
Female × Push
to Connect
- Valve Type: See table
- For Use With: Drinking Water
- Seal Material: EPDM Rubber
- Specifications Met: NSF/ANSI 61
Insert your tubing into the fittings of these valves with just a push—the internal rings will grip it tight. Made of plastic, these valves are a lightweight alternative to metal valves. All meet NSF/ANSI 61 for safe use with drinking water. Since they have a small, short handle, they can fit into tight spots and sit side by side.
Polypropylene valves are more flexible than PVC valves, so they’re better at handling movement and vibration without cracking.
Full-port valves do not restrict flow. Standard-port valves slightly restrict flow.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
| Pipe Size | For Tube OD | Valve Type | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Port Type | End-to-End Lg. | Port-to-Port Lg. | Each | |
Straight with White Polypropylene Plastic Body | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Push to Connect × Push to Connect | ||||||||||
| __ | 1/4" | Plug | Not Rated | 230 psi @ 70° F | 35° to 140° | Full | 1 15/16" | __ | 0000000 | 00000 |
| __ | 3/8" | Plug | Not Rated | 145 psi @ 70° F | 35° to 140° | Full | 2 1/2" | __ | 0000000 | 0000 |
| __ | 6mm | Plug | Not Rated | 230 psi @ 70° F | 35° to 140° | Full | 1 15/16" | __ | 0000000 | 00000 |
| __ | 8mm | Plug | Not Rated | 230 psi @ 70° F | 35° to 140° | Full | 2 1/2" | __ | 0000000 | 00000 |
| __ | 10mm | Plug | Not Rated | 145 psi @ 70° F | 35° to 140° | Full | 2 1/2" | __ | 0000000 | 00000 |
| __ | 12mm | Plug | Not Rated | 145 psi @ 70° F | 35° to 140° | Full | 2 3/4" | __ | 0000000 | 00000 |
NPTF Male × Push to Connect | ||||||||||
| 1/4 | 1/4" | Plug | Not Rated | 230 psi @ 70° F | 35° to 140° | Full | 2" | __ | 0000000 | 0000 |
| 3/8 | 3/8" | Plug | Not Rated | 145 psi @ 70° F | 35° to 140° | Full | 2 9/16" | __ | 0000000 | 0000 |
Elbow with White Polypropylene Plastic Body | ||||||||||
NPTF Female × Push to Connect | ||||||||||
| 1/4 | 1/4" | Plug | Not Rated | 230 psi @ 70° F | 35° to 140° | Full | __ | 1 3/8" | 0000000 | 0000 |
| 1/4 | 3/8" | Plug | Not Rated | 145 psi @ 70° F | 35° to 140° | Full | __ | 1 7/8" | 0000000 | 0000 |
NPT Female × Push to Connect | ||||||||||
| 1/4 | 1/4" | Plug | 0.5 | 125 psi @ 70° F | 35° to 140° | Standard | __ | 1 1/4" | 0000000 | 0000 |
| 1/4 | 3/8" | Plug | Not Rated | 125 psi @ 70° F | 35° to 140° | Standard | __ | 1 1/4" | 0000000 | 0000 |