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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About Pressure Reductions for High-Temperature Braided Hose
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About Hose
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Hose Unions for Chemicals and Petroleum
- For Use With: Citric Acid, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Oil
- Maximum Pressure: See table
Access your line without twisting the hose—these unions separate into three pieces. Also known as WECO couplings and hammer unions, they’re made of forged steel that’s tough enough to be tightened with the blow of a hammer. Use them with other connectors that have the same hammer union figure and pipe size.
Note: Pressure ratings are given for static (constant) pressure conditions with no instantaneous increases in pressure.
Pipe Size | Dash Size | Gasket Material | Hammer Union Figure | Max. Pressure | Each | |
Steel | ||||||
|---|---|---|---|---|---|---|
NPT Female | ||||||
| 1 | 16 | __ | 200 | 2,000 psi @ 72° F | 0000000 | 000000 |
| 1 | 16 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 1 1/2 | 24 | __ | 200 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 2 | 32 | __ | 100 | 1,000 psi @ 72° F | 0000000 | 00000 |
| 2 | 32 | __ | 200 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 2 | 32 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 00000 |
| 4 | 64 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 000000 |
| 6 | 96 | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 000000 |
| 8 | __ | Buna-N Rubber | 206 | 2,000 psi @ 72° F | 0000000 | 000000 |
Extreme-Temperature Air and Steam Hose
with Male and Female Threaded Fittings
- Temperature Range: -325° to 1,200° F
- Maximum Vacuum: 29" of Hg @ 72° F
- Material: 316 Stainless Steel or 321 Stainless Steel
Braided stainless steel construction gives this hose moderate flexibility and makes it tough enough to handle extreme temperatures, as well as vibration.
| Pipe Size | ID | OD | Bend Radius | Max. Pressure | 12" | 18" | 24" | 30" | 36" | 42" | 48" | 54" | 60" | 72" | 84" | 96" | 120" | |
316 Stainless Steel Hose | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
316 Stainless Steel NPT Male Fitting × 316 Stainless Steel NPT Female Fitting | ||||||||||||||||||
| 1/4 × 1/4 | 1/4" | 1/2" | 4 1/2" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 3/8 × 3/8 | 3/8" | 3/4" | 5" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1/2 × 1/2 | 1/2" | 7/8" | 5 1/2" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 3/4 × 3/4 | 3/4" | 1 1/4" | 8" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1 × 1 | 1" | 1 5/8" | 9" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1 1/4 × 1 1/4 | 1 1/4" | 1 7/8" | 10" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1 1/2 × 1 1/2 | 1 1/2" | 2 1/4" | 11" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 2 × 2 | 2" | 2 3/4" | 13" | 300 psi @ 72° F | 0000000 | |||||||||||||
321 Stainless Steel Hose | ||||||||||||||||||
304 Stainless Steel NPT Male Fitting × 304 Stainless Steel NPT Female Fitting | ||||||||||||||||||
| 1/4 × 1/4 | 1/4" | 1/2" | 4 1/2" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 3/8 × 3/8 | 3/8" | 3/4" | 5" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1/2 × 1/2 | 1/2" | 7/8" | 5 1/2" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 3/4 × 3/4 | 3/4" | 1 1/4" | 8" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1 × 1 | 1" | 1 5/8" | 9" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1 1/4 × 1 1/4 | 1 1/4" | 1 7/8" | 10" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 1 1/2 × 1 1/2 | 1 1/2" | 2 1/4" | 11" | 300 psi @ 72° F | 0000000 | |||||||||||||
| 2 × 2 | 2" | 2 3/4" | 13" | 300 psi @ 72° F | 0000000 | |||||||||||||
Extreme-Temperature Air and Steam Hose with Female Threaded Fittings
- Temperature Range: -325° to 1,200° F
- Maximum Vacuum: 29" of Hg @ 72° F
- Material: 316 Stainless Steel or 321 Stainless Steel
Braided stainless steel construction gives this hose moderate flexibility and makes it tough enough to handle extreme temperatures, as well as vibration.
| Pipe Size | ID | OD | Bend Radius | 12" | 18" | 24" | 30" | 36" | 42" | 48" | 54" | 60" | 72" | 84" | 96" | 120" | |
300 psi @ 72° F Max. Pressure | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 × 1/4 | 1/4" | 1/2" | 4 1/2" | 0000000 | |||||||||||||
| 3/8 × 3/8 | 3/8" | 3/4" | 5" | 0000000 | |||||||||||||
| 1/2 × 1/2 | 1/2" | 7/8" | 5 1/2" | 0000000 | |||||||||||||
| 3/4 × 3/4 | 3/4" | 1 1/4" | 8" | 0000000 | |||||||||||||
| 1 × 1 | 1" | 1 5/8" | 9" | 0000000 | |||||||||||||
| 1 1/4 × 1 1/4 | 1 1/4" | 1 7/8" | 10" | 0000000 | |||||||||||||
| 1 1/2 × 1 1/2 | 1 1/2" | 2 1/4" | 11" | 0000000 | |||||||||||||
| 2 × 2 | 2" | 2 3/4" | 13" | 0000000 | |||||||||||||
| Pipe Size | ID | OD | Bend Radius | 12" | 18" | 24" | 30" | 36" | 42" | 48" | 54" | 60" | 72" | 120" | |
300 psi @ 72° F Max. Pressure | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 × 1/4 | 1/4" | 1/2" | 4 1/2" | 0000000 | |||||||||||
| 3/8 × 3/8 | 3/8" | 3/4" | 5" | 0000000 | |||||||||||
| 1/2 × 1/2 | 1/2" | 7/8" | 5 1/2" | 0000000 | |||||||||||
| 3/4 × 3/4 | 3/4" | 1 1/4" | 8" | 0000000 | |||||||||||
| 1 × 1 | 1" | 1 5/8" | 9" | 0000000 | |||||||||||
| 1 1/4 × 1 1/4 | 1 1/4" | 1 7/8" | 10" | 0000000 | |||||||||||
| 1 1/2 × 1 1/2 | 1 1/2" | 2 1/4" | 11" | 0000000 | |||||||||||
| 2 × 2 | 2" | 2 3/4" | 13" | 0000000 | |||||||||||
Extra-Flexible Extreme-Temperature Air and Steam
Hose with Male and Female Threaded Fittings
- Temperature Range: -325° to 1,200° F
- Maximum Vacuum: 29" of Hg @ 72° F
- Material: 316 Stainless Steel or 321 Stainless Steel
Made of extra-flexible braided stainless steel, this hose allows for misalignment and is easy to bend, yet it's tough enough to handle high temperatures and vibration.
| Pipe Size | ID | OD | Bend Radius | 12" | 18" | 24" | 30" | 36" | 42" | 48" | 54" | 60" | 72" | 84" | 96" | 120" | |
300 psi @ 72° F Max. Pressure | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 × 1/4 | 1/4" | 1/2" | 3 11/16" | 0000000 | |||||||||||||
| 3/8 × 3/8 | 3/8" | 3/4" | 4" | 0000000 | |||||||||||||
| 1/2 × 1/2 | 1/2" | 7/8" | 4 3/8" | 0000000 | |||||||||||||
| 3/4 × 3/4 | 3/4" | 1 1/4" | 6 3/8" | 0000000 | |||||||||||||
| 1 × 1 | 1" | 1 5/8" | 7 1/16" | 0000000 | |||||||||||||
| 1 1/4 × 1 1/4 | 1 1/4" | 1 7/8" | 7 7/8" | 0000000 | |||||||||||||
| 1 1/2 × 1 1/2 | 1 1/2" | 2 1/4" | 8 11/16" | 0000000 | |||||||||||||
| 2 × 2 | 2" | 2 3/4" | 10 5/16" | 0000000 | |||||||||||||
| Pipe Size | ID | OD | Bend Radius | 12" | 18" | 24" | 30" | 36" | 42" | 48" | 60" | 72" | |
300 psi @ 72° F Max. Pressure | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 × 1/4 | 1/4" | 1/2" | 3 11/16" | 00000000 | |||||||||
| 3/8 × 3/8 | 3/8" | 3/4" | 4" | 00000000 | |||||||||
| 1/2 × 1/2 | 1/2" | 7/8" | 4 3/8" | 00000000 | |||||||||
| 3/4 × 3/4 | 3/4" | 1 1/4" | 6 3/8" | 00000000 | |||||||||
| 1 × 1 | 1" | 1 5/8" | 7 1/16" | 00000000 | |||||||||
| 1 1/4 × 1 1/4 | 1 1/4" | 1 7/8" | 7 7/8" | 00000000 | |||||||||
| 1 1/2 × 1 1/2 | 1 1/2" | 2 1/4" | 8 11/16" | 00000000 | |||||||||
| 2 × 2 | 2" | 2 3/4" | 10 5/16" | 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: See table
Union connectors separate into three pieces for easy access to your line.
| Copper Tube Size | For Tube OD | Material | Max. Pressure | Specifications Met | Each | |
| 1/4 | 3/8" | Copper | 400 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 00000000 | 000000 |
| 3/8 | 1/2" | Copper | 400 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 0000000 | 00000 |
| 1/2 | 5/8" | Copper | 400 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 0000000 | 00000 |
| 3/4 | 7/8" | Copper | 400 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 0000000 | 00000 |
| 1 | 1 1/8" | Copper | 400 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 0000000 | 00000 |
| 1 1/4 | 1 3/8" | Copper | 400 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 0000000 | 00000 |
| 1 1/2 | 1 5/8" | Copper | 400 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 0000000 | 00000 |
| 2 | 2 1/8" | Copper | 300 psi @ 72° F | ASME B16.22, MSS-SP104, NSF/ANSI 61 | 0000000 | 000000 |
| 2 1/2 | 2 5/8" | Bronze | 300 psi @ 72° F | ASME B16.18, NSF/ANSI 61 | 00000000 | 000000 |
| 3 | 3 1/8" | Bronze | 300 psi @ 72° F | ASME B16.18, NSF/ANSI 61 | 00000000 | 000000 |
Cleaned and Bagged Solder-Connect Fittings for Copper Tubing
- For Use With: Drinking Water
- Temperature Range: 32° to 200° F
- Tubing: Use with K, M, L copper
- Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61
When cleanliness is crucial to your application, choose these fittings that are individually cleaned and bagged to prevent contamination. Solder the socket end 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. They meet NSF/ANSI 61 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.
Union connectors separate into three pieces for easy access to your line.
| Copper Tube Size | For Tube OD | Material | Max. Pressure | Each | |
| 1/4 | 3/8" | Copper | 400 psi @ 72° F | 0000000 | 000000 |
| 3/8 | 1/2" | Copper | 400 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 5/8" | Copper | 400 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 7/8" | Copper | 400 psi @ 72° F | 0000000 | 00000 |
| 1 | 1 1/8" | Copper | 400 psi @ 72° F | 0000000 | 00000 |
| 1 1/2 | 1 5/8" | Copper | 400 psi @ 72° F | 0000000 | 00000 |
| 2 | 2 1/8" | Copper | 400 psi @ 72° F | 0000000 | 000000 |
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.
Unions separate into three pieces for easy access to your line.
| Copper Tube Size | For Tube OD | Pipe Size | Lg. | Material | Compatible With | Specifications Met | Each | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2 | 5/8" | 1/2 | 2 19/32" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 3/4 | 7/8" | 3/4 | 2 29/32" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 00000 |
| 1 | 1 1/8" | 1 | 3 29/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 00000 |
| 1 1/4 | 1 3/8" | 1 1/4 | 3 33/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 00000 |
| 1 1/2 | 1 5/8" | 1 1/2 | 4 15/32" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 2 | 2 1/8" | 2 | 4 9/16" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
Unions separate into three pieces for easy access to your line.
| Copper Tube Size | For Tube OD | Pipe Size | Lg. | Material | Compatible With | Specifications Met | Each | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2 | 5/8" | 1/2 | 2 17/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 3/4 | 7/8" | 3/4 | 2 27/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 00000 |
| 1 | 1 1/8" | 1 | 2 7/8" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 00000 |
| 1 1/4 | 1 3/8" | 1 1/4 | 2 31/32" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 00000 |
| 1 1/2 | 1 5/8" | 1 1/2 | 3 7/8" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 2 | 2 1/8" | 2 | 3 59/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
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, FM Approved, NSF/ANSI 61 | 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, FM Approved, NSF/ANSI 61 | 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, FM Approved, NSF/ANSI 61 | 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, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 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, FM Approved, NSF/ANSI 61 | 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, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
Unions separate into three pieces for easy access to your line.
| Copper Tube Size | For Tube OD | Lg. | Material | Compatible With | Specifications Met | Each | |
| 1/2 | 5/8" | 2 27/32" | Bronze | Viega ProPress | ASME B16.51, FM Approved, NSF/ANSI 61 | 0000000 | 000000 |
| 3/4 | 7/8" | 3 5/32" | Bronze | Viega ProPress | ASME B16.51, FM Approved, NSF/ANSI 61 | 0000000 | 00000 |
| 1 | 1 1/8" | 3 41/64" | Bronze | Viega ProPress | ASME B16.51, FM Approved, NSF/ANSI 61 | 0000000 | 00000 |
| 1 1/4 | 1 3/8" | 3 11/16" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 00000 |
| 1 1/2 | 1 5/8" | 4 61/64" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 00000000 | 000000 |
| 2 | 2 1/8" | 5 7/32" | Bronze | Viega ProPress | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, FM Approved, NSF/ANSI 61 | 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 |