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.
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Standard-Wall Copper-Nickel Threaded Pipe Nipples and Pipe
- For Use With: Air, Natural Gas, Oil, Water, Salt Water
- Specifications Met: ASME B1.20.1, ASTM B466
Made of copper-nickel, this Schedule 40 pipe has excellent resistance to stress cracking and has better corrosion resistance than most stainless steel alloys. It is often used in highly-corrosive environments, such as salt water applications. Also known as a close nipple, it is threaded on both ends to the center. Pipe is seamless, which provides a smooth interior for unrestricted flow.
Copper-Nickel Unthreaded Pipe
- For Use With: Air, Natural Gas, Oil, Water, Salt Water
- Pressure Class : 200
- Specifications Met: MIL-T-16420
- Fittings: Use Class 200 copper-nickel
Designed for salt water applications, this pipe is made of copper-nickel, which has excellent resistance to stress cracking and better corrosion resistance than most stainless steel alloys. Pipe is also known as Pressure Class 200 pipe. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is seamless, which provides a smooth interior for unrestricted flow.
| Lg., ft. | Wall Thick. | Construction | Each | |
1 Pipe Size  | ||||
|---|---|---|---|---|
| 1 | 0.065" | Seamless | 0000000 | 000000 |
| 3 | 0.065" | Seamless | 0000000 | 000000 |
| 6 | 0.065" | Seamless | 0000000 | 000000 |
1 1/2 Pipe Size | ||||
| 1 | 0.072" | Seamless | 0000000 | 00000 |
| 3 | 0.072" | Seamless | 0000000 | 000000 |
| 6 | 0.072" | Seamless | 0000000 | 000000 |
2 Pipe Size | ||||
| 1 | 0.083" | Seamless | 0000000 | 000000 |
| 3 | 0.083" | Seamless | 0000000 | 000000 |
| 6 | 0.083" | Seamless | 0000000 | 000000 |
2 1/2 Pipe Size | ||||
| 1 | 0.083" | Seamless | 0000000 | 000000 |
| 3 | 0.083" | Seamless | 0000000 | 000000 |
| 6 | 0.083" | Seamless | 0000000 | 000000 |
3 Pipe Size | ||||
| 1 | 0.095" | Seamless | 0000000 | 000000 |
| 3 | 0.095" | Seamless | 0000000 | 000000 |
| 6 | 0.095" | Seamless | 0000000 | 000000 |
4 Pipe Size | ||||
| 1 | 0.109" | Seamless | 0000000 | 000000 |
| 3 | 0.109" | Seamless | 0000000 | 000000 |
| 6 | 0.109" | Seamless | 0000000 | 00000000 |
Solder-Connect Fittings for Copper Tubing
- Temperature Range: 32° to 200° F
Solder these fittings to copper tubing or the tube end of another fitting for a permanent, leak-tight connection. They are also known as sweat fittings. Fittings have good corrosion resistance. To adhere to safety standards for drinking water systems, use fittings that meet NSF/ANSI 61 or EN 1057.
Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.
- For Use With: Drinking Water
- Tubing: Use with K, M, L copper
- Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61
| Copper Tube Size | Tube OD | Pipe Size | Material | Max. Pressure | Each | |
NPT Threads | ||||||
|---|---|---|---|---|---|---|
| 1/4 | 3/8" | 1/4 | Copper | 400 psi @ 72° F | 00000000 | 00000 |
| 3/8 | 1/2" | 3/8 | Copper | 400 psi @ 72° F | 00000000 | 0000 |
| 1/2 | 5/8" | 1/2 | Copper | 400 psi @ 72° F | 00000000 | 0000 |
| 1/2 | 5/8" | 3/4 | Copper | 400 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 7/8" | 1/2 | Copper | 400 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 7/8" | 3/4 | Copper | 400 psi @ 72° F | 00000000 | 0000 |
| 1 | 1 1/8" | 1 | Copper | 400 psi @ 72° F | 00000000 | 00000 |
| 1 1/4 | 1 3/8" | 1 1/4 | Copper | 400 psi @ 72° F | 00000000 | 00000 |
| 1 1/2 | 1 5/8" | 1 1/2 | Copper | 400 psi @ 72° F | 00000000 | 00000 |
| 2 | 2 1/8" | 2 | Copper | 300 psi @ 72° F | 00000000 | 00000 |
- For Use With: Drinking Water
- Tubing: Use with K, M, L copper
- Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61
Tube Connection (A) | Tube Connection (B) | |||||||
|---|---|---|---|---|---|---|---|---|
| Copper Tube Size | Tube OD | Copper Tube Size | For Tube OD | Material | Max. Pressure | Lg. | Each | |
| 3 | 3 1/8" | 2 1/2 | 2 5/8" | Copper | 300 psi @ 72° F | 3 9/16" | 00000000 | 000000 |
| 3 1/2 | 3 5/8" | 2 | 2 1/8" | Copper | 300 psi @ 72° F | 4 9/64" | 00000000 | 00000 |
| 3 1/2 | 3 5/8" | 2 1/2 | 2 5/8" | Copper | 300 psi @ 72° F | 3 29/32" | 00000000 | 00000 |
| 3 1/2 | 3 5/8" | 3 | 3 1/8" | Copper | 300 psi @ 72° F | 3 29/32" | 00000000 | 00000 |
| 4 | 4 1/8" | 2 | 2 1/8" | Copper | 200 psi @ 72° F | 4 7/8" | 00000000 | 00000 |
| 4 | 4 1/8" | 2 1/2 | 2 5/8" | Copper | 200 psi @ 72° F | 4 11/16" | 00000000 | 00000 |
| 4 | 4 1/8" | 3 | 3 1/8" | Copper | 200 psi @ 72° F | 4 19/32" | 00000000 | 00000 |
| 4 | 4 1/8" | 3 1/2 | 3 5/8" | Copper | 200 psi @ 72° F | 4 5/8" | 00000000 | 00000 |
| 5 | 5 1/8" | 2 | 2 1/8" | Copper | 200 psi @ 72° F | 5 25/32" | 00000000 | 000000 |
| 5 | 5 1/8" | 2 1/2 | 2 5/8" | Copper | 200 psi @ 72° F | 5 39/64" | 00000000 | 000000 |
| 5 | 5 1/8" | 3 | 3 1/8" | Copper | 200 psi @ 72° F | 5 15/32" | 00000000 | 000000 |
| 5 | 5 1/8" | 4 | 4 1/8" | Copper | 200 psi @ 72° F | 5 1/2" | 00000000 | 000000 |
| 6 | 6 1/8" | 2 | 2 1/8" | Copper | 200 psi @ 72° F | 6 9/16" | 00000000 | 000000 |
| 6 | 6 1/8" | 2 1/2 | 2 5/8" | Copper | 200 psi @ 72° F | 6 1/2" | 00000000 | 000000 |
| 6 | 6 1/8" | 3 | 3 1/8" | Copper | 200 psi @ 72° F | 6 3/8" | 00000000 | 000000 |
| 6 | 6 1/8" | 4 | 4 1/8" | Copper | 200 psi @ 72° F | 6 35/64" | 00000000 | 000000 |
| 6 | 6 1/8" | 5 | 5 1/8" | Copper | 200 psi @ 72° F | 6 35/64" | 00000000 | 000000 |
- For Use With: Drinking Water
- Tubing: Use with K, M, L copper
- Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61
- For Use With: Drinking Water
- Tubing: See table
- Specifications Met: See table
Fittings with center stop have a small internal ridge that prevents the tubing from sliding all the way through the fitting.
| For Tube OD | Material | Max. Pressure | For Copper Tube Type | Specifications Met | Each | |
| 1" | Copper | 400 psi @ 72° F | K, M, L | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 00000000 | 00000 |
- For Use With: Drinking Water
- Tubing: Use with K, M, L copper
- Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61
Fittings with center stop have a small internal ridge that prevents the tubing from sliding all the way through the fitting.
Tube Connection (A) | Tube Connection (B) | ||||||
|---|---|---|---|---|---|---|---|
| Copper Tube Size | For Tube OD | Copper Tube Size | For Tube OD | Material | Max. Pressure | Each | |
| 4 | 4 1/8" | 2 1/2 | 2 5/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 4 | 4 1/8" | 3 1/2 | 3 5/8" | Copper | 200 psi @ 72° F | 00000000 | 00000 |
| 5 | 5 1/8" | 2 | 2 1/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 5 | 5 1/8" | 2 1/2 | 2 5/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 5 | 5 1/8" | 3 | 3 1/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 5 | 5 1/8" | 4 | 4 1/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 6 | 6 1/8" | 2 | 2 1/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 6 | 6 1/8" | 2 1/2 | 2 5/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 6 | 6 1/8" | 3 | 3 1/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 6 | 6 1/8" | 4 | 4 1/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
| 6 | 6 1/8" | 5 | 5 1/8" | Copper | 200 psi @ 72° F | 00000000 | 000000 |
- For Use With: Drinking Water
- Tubing: See table
- Specifications Met: See table
| Copper Tube Size | For Tube OD | Material | Max. Pressure | For Copper Tube Type | Specifications Met | Each | |
| 3 1/2 | 3 5/8" | Copper | 300 psi @ 72° F | K, M, L | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 00000000 | 0000000 |
| 4 | 4 1/8" | Copper | 200 psi @ 72° F | K, M, L | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 00000000 | 000000 |
| 5 | 5 1/8" | Copper | 200 psi @ 72° F | K, M, L | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 00000000 | 000000 |
| 6 | 6 1/8" | Copper | 200 psi @ 72° F | K, M, L | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 00000000 | 000000 |