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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Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met: ASTM A351
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
304 Stainless Steel | 316 Stainless Steel | |||||
|---|---|---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Female × NPT Male | ||||||
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | 000000 | 00 | 00000000 | 000000 |
| 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 000000 | 00000000 | 00000 |
| 3/8 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
| 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
| 3/4 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
| 1 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 | 00000000 | 00000 |
| 1 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
| 1 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
| 2 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
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
Iron × Copper | ||||||
|---|---|---|---|---|---|---|
| Pipe Size | Lg. | Copper Tube Size | For Tube OD | Max. Pressure | Each | |
NPT Male × Socket Connect Female | ||||||
| 1/2 | 2 5/8" | 1/2 | 5/8" | 250 psi @ 72° F | 00000000 | 000000 |
| 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 |
Thick-Wall Plastic Pipe Fittings for Water
Connect these fittings to Schedule 80 pipe–they have thicker, stronger walls than standard-wall fittings so they can handle heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation. Fittings are plastic for good corrosion resistance. They meet ASTM specifications and testing requirements for material quality.
Fittings for drinking water meet NSF/ANSI Standard 61.
Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a PVC primer and cement (also known as solvent weld).
For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections.
Note: For fittings that are not rated for pressure, you can use the pressure rating of the plastic pipe as a reference. Threaded fittings are limited to 50% of the rated pressure of the pipe.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
For technical drawings and 3-D models, click on a part number.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Unions separate into three pieces so you can access your line.
| Pipe Size | Socket Depth | OD | ID | Wall Thick. | Material | O-Ring Material | Color | Each | |
| 1/2 | 7/8" | 27/32" | 0.546" | 0.147" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 3/4 | 1" | 1 3/64" | 0.742" | 0.154" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 0000 |
| 1 | 1 1/8" | 1 5/16" | 0.957" | 0.179" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 1 1/4 | 1 1/4" | 1 21/32" | 1.278" | 0.191" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 1 1/2 | 1 3/8" | 1 29/32" | 1.5" | 0.2" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 2 | 1 1/2" | 2 3/8" | 1.939" | 0.218" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 2 1/2 | 1 3/4" | 2 7/8" | 2.323" | 0.276" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 3 | 1 7/8" | 3 1/2" | 2.9" | 0.3" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 4 | 2 1/4" | 4 1/2" | 3.826" | 0.337" | PVC Plastic | EPDM Rubber | Dark Gray | 00000000 | 00000 |
Gravity-Flow Polypropylene Pipe Fittings for Corrosive Chemical Waste
- For Use With: Deionized Water, Hydrochloric Acid, Oil, Phosphoric Acid, Salt Water, Solvents
- Maximum Temperature: 220° F
- Specifications Met: ASTM D4101, ASTM D635, ASTM F1412, UL 94 V-2
- Compatible with Gravity-Flow Polypropylene Pipe for Corrosive Chemical Waste
Made of polypropylene, these gravity-flow fittings withstand organic solvents, such as acetone, that would dissolve CPVC pipe. They also stand up to highly corrosive acids, such as hydrochloric acid, and alkalies. All meet UL and ASTM standards for flame retardance and self-extinguishment in the case of fire. They also meet strict ASTM specifications and testing requirements for material quality and product dimensions. They’re compatible with Orion Blueline No-Hub and Orion Rionfuse chemical waste pipe and pipe fittings.
270° bend connectors are also known as P-traps. Union connectors separate into three pieces for easy access to your line.
For technical drawings and 3-D models, click on a part number.
Press-Connect Fittings for Copper Tubing
- For Use With: Drinking Water
- Maximum Pressure: 200psi @ 72° F
- Temperature Range: 0° to 250° F
- Tubing: Use with K, M, L copper
- 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.
Unions separate into three pieces for easy 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.
| Copper Tube Size | For Tube OD | Pipe Size | Lg. | Material | Specifications Met | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/2 | 5/8" | 1/2 | 2 19/32" | Bronze | 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 29/32" | Bronze | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 00000 |
| 1 | 1 1/8" | 1 | 3 29/64" | Bronze | 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 | 3 33/64" | Bronze | 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 | 4 15/32" | Bronze | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 00000 |
| 2 | 2 1/8" | 2 | 4 9/16" | Bronze | ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213 | 00000000 | 000000 |
