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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Medium-Pressure Pipe Fittings for Joining Dissimilar Metals
Use these unions to connect different metals in a piping or plumbing system. They have a plastic sleeve that inhibits destructive corrosion. Use them for connections that must be electrically insulated. Unions separate into three pieces for access to your line.
Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water, Oil, Natural Gas
- Max.Temperature: 180° F
Galvanized Iron × Galvanized Iron | Iron × Brass | |||||
|---|---|---|---|---|---|---|
Pipe Size | Lg. | Max. Pressure | Each | Each | ||
NPT Female | ||||||
| 1/2 | 2 1/4" | 250 psi @ 72° F | 0000000 | 000000 | 0000000 | 000000 |
| 3/4 | 2 1/4" | 250 psi @ 72° F | 0000000 | 00000 | 0000000 | 00000 |
| 1 | 2 1/2" | 250 psi @ 72° F | 0000000 | 00000 | 0000000 | 00000 |
| 1 1/4 | 2 3/4" | 250 psi @ 72° F | 0000000 | 00000 | 0000000 | 000000 |
| 1 1/2 | 2 3/4" | 250 psi @ 72° F | 0000000 | 00000 | 0000000 | 000000 |
| 2 | 3 1/8" | 250 psi @ 72° F | 0000000 | 000000 | 0000000 | 000000 |
- For Use With: Air, Water, Oil, Natural Gas
- Max.Temperature: 180° F
Iron × Copper | ||||||
|---|---|---|---|---|---|---|
| Pipe Size | Lg. | Copper Tube Size | For Tube OD | Max. Pressure | Each | |
NPT Female × Socket Connect Female | ||||||
| 1/2 | 1 7/8" | 1/2 | 5/8" | 250 psi @ 72° F | 000000 | 000000 |
| 1/2 | 1 7/8" | 3/8 | 1/2" | 250 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 1 7/8" | 1/2 | 5/8" | 250 psi @ 72° F | 000000 | 00000 |
| 3/4 | 2 1/8" | 3/4 | 7/8" | 250 psi @ 72° F | 000000 | 00000 |
| 1 | 2 1/2" | 1 | 1 1/8" | 250 psi @ 72° F | 000000 | 00000 |
| 1 | 2 1/2" | 3/4 | 7/8" | 250 psi @ 72° F | 000000 | 00000 |
| 1 1/4 | 3" | 1 1/4 | 1 3/8" | 250 psi @ 72° F | 000000 | 00000 |
| 1 1/2 | 3" | 1 1/2 | 1 5/8" | 250 psi @ 72° F | 000000 | 00000 |
| 2 | 3" | 2 | 2 1/8" | 250 psi @ 72° F | 000000 | 000000 |
NPT Male × Socket Connect Female | ||||||
| 1/2 | 2 5/8" | 1/2 | 5/8" | 250 psi @ 72° F | 00000000 | 00000 |
| 1/2 | 3" | 3/8 | 1/2" | 250 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 2 15/16" | 3/4 | 7/8" | 250 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 3" | 1/2 | 5/8" | 250 psi @ 72° F | 00000000 | 00000 |
| 3/4 | 3" | 3/4 | 7/8" | 250 psi @ 72° F | 00000000 | 00000 |
Press-Connect Fittings for Copper Tubing
- For Use With: Drinking Water
- Maximum Pressure: Fittings compatible with Viega ProPress or Viega ProPress XL-C: 200 psi @ 72° F
Fittings compatible with Viega Pex or Viega PureFlow Press: 100 psi @ 72° F - Temperature Range: 0° to 250° F
- Tubing: Fittings compatible with Viega ProPress or Viega ProPress XL-C: Use with K, M, L copper
Fittings compatible with Viega Pex or Viega PureFlow Press: Use with hard polyethylene plastic - Specifications Met: See table
Crimp these fittings to copper tubing with a crimping tool (sold separately). An O-ring on the inside of the fitting creates a leak-tight connection that doesn’t require heat or soldering. They are comparable to Viega ProPress fittings. Fittings have good corrosion resistance. They meet NSF/ANSI safety standards for use with drinking water systems.
Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.
For technical drawings and 3-D models, click on a part number.
Unions separate into three pieces for easy access to your line. Union adapters for galvanized steel threaded pipe join copper tubing to galvanized threaded connections on hot water heaters.
| Copper Tube Size | For Tube OD | Pipe Size | Lg. | Material | Compatible With | Specifications Met | Each | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2 | 5/8" | 1/2 | 2 15/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 000000 |
| 3/4 | 7/8" | 3/4 | 2 9/16" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 00000 |
| 1 | 1 1/8" | 1 | 2 9/16" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 00000 |
| 1 1/4 | 1 3/8" | 1 1/4 | 2 11/16" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 00000 |
| 1 1/2 | 1 5/8" | 1 1/2 | 3 7/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 000000 |
| 2 | 2 1/8" | 2 | 3 17/32" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 000000 |
| For Copper Tube Size | For Tube OD | O-Ring Material | Compatible With | Each | |
| 1/2 | 5/8" | EPDM Rubber | Viega ProPress | 0000000 | 00000 |
| 3/4 | 7/8" | EPDM Rubber | Viega ProPress | 0000000 | 0000 |
| 1 | 1 1/8" | EPDM Rubber | Viega ProPress | 0000000 | 0000 |
| 1 1/4 | 1 3/8" | EPDM Rubber | Viega ProPress | 00000000 | 0000 |
| 1 1/2 | 1 5/8" | EPDM Rubber | Viega ProPress | 00000000 | 0000 |
| 2 | 2 1/8" | EPDM Rubber | Viega ProPress | 00000000 | 0000 |
Jaws for copper tube sizes ½ to 2 fit directly into the included crimping tool.
Battery | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Copper Tube Size | For Tube OD | Voltage | No. Included | Cap., amp-hrs. | Battery Charger Included | Battery Charging Time, min. | Compatible With | Specifications Met | Each | |
| 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | 5/8", 7/8", 1 1/8", 1 3/8", 1 5/8", 2 1/8" | 18V DC | 2 | 3 | Yes | 39 | Viega ProPress | EMC 2011/65/EU, EMC 2014/30/EU, IEC 62841-1, UL 62841-1 | 00000000 | 000000000 |