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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High-Pressure Socket-Connect Stainless Steel Unthreaded Pipe Fittings
Forged for excellent strength, these heavy duty socket-connect fittings stand up to high-pressure applications. They are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Tee outlets allow you to create a tap anywhere along a pipe. They are also known as branch connectors and are comparable to Weldolet. To install, drill a hole in your pipe to match the fitting’s pipe size and weld in place.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A182
- Pipe Nipples and Pipe: Use Schedule 80 stainless steel
Pipe Size | For Pipe Size | Height | Max. Pressure | Max. Steam Pressure | Each | |
304/304L Stainless Steel | ||||||
|---|---|---|---|---|---|---|
Socket Connect × Butt Weld | ||||||
| 1/4 | 1/4 to 3/8 | 3/4" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 1/4 | 1/2 to 36 | 3/4" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 3/8 | 3/4 to 36 | 13/16" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 1/2 | 1/2 | 1" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 1/2 | 3/4 to 36 | 1" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 3/4 | 1 1/2 to 36 | 1 1/16" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 3/4 | 3/4 to 1 1/4 | 1 1/16" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 1 | 1 1/4 to 2 1/2 | 1 5/16" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 1 | 1 | 1 5/16" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 1 | 3 to 36 | 1 5/16" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 00000 |
| 1 1/4 | 2 to 3 1/2 | 1 5/16" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 1 1/2 | 6 to 36 | 1 3/8" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 1 1/2 | 1 1/2 | 1 3/8" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 1 1/2 | 2 to 2 1/2 | 1 3/8" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 1 1/2 | 3 to 5 | 1 3/8" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 2 | 4 to 6 | 1 1/2" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 2 | 8 to 36 | 1 1/2" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 2 | 2 | 1 1/2" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
| 2 | 2 1/2 to 3 1/2 | 1 1/2" | 2,900 psi @ 72° F | 2,400 psi @ 212° F | 0000000 | 000000 |
316/316L Stainless Steel | ||||||
Socket Connect × Butt Weld | ||||||
| 1/4 | 1/4 to 3/8 | 3/4" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 1/4 | 1/2 to 36 | 3/4" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 3/8 | 3/4 to 36 | 13/16" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 1/2 | 1/2 | 1" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 1/2 | 3/4 to 36 | 1" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 3/4 | 1 1/2 to 36 | 1 1/16" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 3/4 | 3/4 to 1 1/4 | 1 1/16" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 1 | 1 1/4 to 2 1/2 | 1 5/16" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 1 | 1 | 1 5/16" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 1 | 3 to 36 | 1 5/16" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 00000 |
| 1 1/2 | 6 to 36 | 1 3/8" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 000000 |
| 1 1/2 | 3 to 5 | 1 3/8" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 000000 |
| 2 | 4 to 6 | 1 1/2" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 000000 |
| 2 | 2 | 1 1/2" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 000000 |
| 2 | 2 1/2 to 3 1/2 | 1 1/2" | 2,900 psi @ 72° F | 2,480 psi @ 212° F | 0000000 | 000000 |
High-Pressure Socket-Connect Steel Unthreaded Pipe Fittings
Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings have heavy duty construction that stands up to high-pressure applications. They are for use in noncorrosive environments.
Tee outlets allow you to create a tap anywhere along a pipe. They are also known as branch connectors and are comparable to Sockolet. To install, drill a hole in your pipe to match the fitting’s pipe size and weld in place.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Specifications Met: ASME B31.1, ASME B31.3, ASTM A105, MSS SP-97, ASME B16.9, ASME B16.11
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 and 600 steel
| Pipe Size | Dash Size | For Pipe Size | Ht. | Max. Pressure | Max. Steam Pressure | Material | Each | |
| 1/4 | 04 | 3/8 to 36 | 3/4" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 000000 |
| 3/8 | 06 | 3/8 to 1/2 | 7/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 3/8 | 06 | 3/4 to 36 | 7/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1/2 | 08 | 3/4 to 36 | 1" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 3/4 | 12 | 1 1/2 to 36 | 1 1/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 3/4 | 12 | 3/4 to 1 1/4 | 1 1/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 | 16 | 1 1/4 to 2 1/2 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 | 16 | 1 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 | 16 | 3 to 36 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 1/4 | 20 | 1 1/4 to 1 1/2 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 1/4 | 20 | 2 to 3 1/2 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 1/4 | 20 | 4 to 36 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 1/2 | 24 | 6 to 36 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 1/2 | 24 | 1 1/2 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 1/2 | 24 | 2 to 2 1/2 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 1 1/2 | 24 | 3 to 5 | 1 3/8" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 2 | 32 | 4 to 6 | 1 1/2" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 00000000 | 00000 |
| 2 | 32 | 8 to 36 | 1 1/2" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 2 | 32 | 2 | 1 1/2" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
| 2 | 32 | 2 1/2 to 3 1/2 | 1 1/2" | 3,000 psi @ 72° F | 300 psi @ 360° F | Steel | 0000000 | 00000 |
Standard-Wall Plastic Pipe Fittings for Water
Connect these fittings to Schedule 40 plastic pipe–they are the industry standard for residential and commercial low-pressure plumbing and water supply applications. They are plastic for good corrosion resistance.
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).
To prevent leaks in threaded connections, apply a sealant to the male threads. Threaded connections can be taken apart as needed for maintenance and repair. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections. Fittings that meet ASTM D1784, ASTM D1785, and ASTM D4066 adhere to specifications and testing requirements for material quality.
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: See table
- Pipe Nipples and Pipe:
Pipe Size 1/2 to 1: Use PVC Plastic
Pipe Size 1 1/2 to 3: Use Aluminum, Iron, PVC Plastic, Stainless Steel, Steel - Flanges: Use Class 150 PVC Plastic
Saddle-tap tee adapters allow you to create additional outlets and connections in metal or plastic pipe. To install, shut down your line and drill a hole in the pipe where you want to create a connection. Position the saddle over the hole so the gasket and lip are fully engaged and secure with the included nuts, bolts, and washers.
| Pipe Size | For Pipe Size | Socket Depth | For Pipe OD | For Hole Dia. | OD | ID | Wall Thick. | Material | Color | Max. Pressure | Specifications Met | Each | |
| 1/2 | 2 | 5/16" | 2 3/8" | 3/4" | 27/32" | 0.622" | 0.109" | PVC Plastic | White | 300 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 000000 |
| 1/2 | 3 | 11/16" | 3 1/2" | 7/8" | 27/32" | 0.622" | 0.109" | PVC Plastic | White | 300 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 00000 |
| 1/2 | 4 | 1" | 4 1/2" | 1 1/8" | 27/32" | 0.622" | 0.109" | PVC Plastic | White | 300 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 00000 |
| 3/4 | 2 | 5/16" | 2 3/8" | 7/8" | 1 1/16" | 0.824" | 0.113" | PVC Plastic | White | 240 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 00000 |
| 3/4 | 3 | 9/32" | 3 1/2" | 7/8" | 1 1/16" | 0.824" | 0.113" | PVC Plastic | White | 240 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 00000 |
| 3/4 | 4 | 13/16" | 4 1/2" | 1 1/8" | 1 1/16" | 0.824" | 0.113" | PVC Plastic | White | 240 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 000000 |
| 1 | 2 | 5/16" | 2 3/8" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | White | 225 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 00000 |
| 1 | 3 | 9/32" | 3 1/2" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | White | 225 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 00000 |
| 1 | 4 | 13/32" | 4 1/2" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | White | 225 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 000000 |
| 1 | 6 | 5/8" | 6 5/8" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | White | 225 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 000000 |
| 1 1/2 | 3 | 29/32" | 3 1/2" | 2 1/4" | 1 29/32" | 1.61" | 0.145" | PVC Plastic | White | 200 psi @ 72° F | ASTM D1784, NSF/ANSI 61 | 0000000 | 00000 |
| 1 1/2 | 4 | 1/2" | 4 1/2" | 1 3/4" | 1 29/32" | 1.61" | 0.145" | PVC Plastic | White | 200 psi @ 72° F | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
| 2 | 3 | 3/8" | 3 1/2" | 2 1/4" | 2 3/8" | 2.067" | 0.154" | PVC Plastic | White | 200 psi @ 72° F | ASTM D1784, NSF/ANSI 61 | 0000000 | 00000 |
| 2 | 4 | 7/16" | 4 1/2" | 2 1/4" | 2 3/8" | 2.067" | 0.154" | PVC Plastic | White | 200 psi @ 72° F | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
| 2 | 6 | 11/16" | 6 5/8" | 2 1/4" | 2 3/8" | 2.067" | 0.154" | PVC Plastic | White | 200 psi @ 72° F | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
| 3 | 4 | 1/2" | 4 1/2" | 3" | 3 1/2" | 3.068" | 0.216" | PVC Plastic | White | 200 psi @ 72° F | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 372, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Tee outlets allow you to create additional outlets and connections in plastic pipe. Use a PVC primer and cement to secure the tee outlet into position, then drill a hole through the fitting and pipe. They are also known as branch connectors.
| Pipe Size | For Pipe Size | Socket Depth | Material | Color | Each | |
| 1/2 | 1/2 | 7/32" | PVC Plastic | White | 0000000 | 00000 |
| 3/4 | 1/2 | 3/16" | PVC Plastic | White | 0000000 | 0000 |
| 3/4 | 3/4 | 3/16" | PVC Plastic | White | 0000000 | 0000 |
| 1 | 1/2 | 3/16" | PVC Plastic | White | 0000000 | 0000 |
| 1 | 1 | 5/32" | PVC Plastic | White | 0000000 | 0000 |
| 1 1/4 | 1 1/4 | 5/32" | PVC Plastic | White | 0000000 | 0000 |
| 1 1/2 | 1 1/2 | 5/32" | PVC Plastic | White | 0000000 | 0000 |
| 2 | 2 | 5/32" | PVC Plastic | White | 0000000 | 00000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Tee outlets allow you to create additional outlets and connections in plastic pipe. Use a PVC primer and cement to secure the tee outlet into position, then drill a hole through the fitting and pipe. They are also known as branch connectors.
| Pipe Size | For Pipe Size | Material | Color | Specifications Met | Each | |
NPT Threads | ||||||
|---|---|---|---|---|---|---|
| 1/8 | 1/2 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 00000 |
| 1/8 | 3/4 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 0000 |
| 1/2 | 1/2 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 0000 |
| 1/2 | 3/4 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 0000 |
| 1/2 | 1 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 0000 |
| 3/4 | 3/4 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 0000 |
| 3/4 | 1 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 0000 |
| 1 | 1 | PVC Plastic | White | ASTM D1784, NSF/ANSI 61 | 00000000 | 0000 |
| 1 1/2 | 3/4 | PVC Plastic | White | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 00000000 | 0000 |
Thick-Wall Plastic Pipe Fittings for Water
Connect these fittings to Schedule 80 pipe. With thicker, stronger walls than standard-wall fittings, they can handle heavy duty supply applications, such as water processing, wastewater 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).
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 372, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Schedule 80 PVC Plastic
Saddle-tap tees allow you to create additional outlets and connections in metal or plastic pipe. To install, shut down your line and drill a hole in the pipe where you want to create a connection. Position the saddle over the hole so the gasket and lip are fully engaged and secure with the included nuts, bolts, and washers.
| Pipe Size | Socket Depth | For Pipe Size | For Pipe OD | For Hole Dia. | Material | Color | Max. Pressure | Each | |
| 1/2 | 5/16" | 2 | 2 3/8" | 3/4" | PVC Plastic | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 1/2 | 11/16" | 3 | 3 1/2" | 7/8" | PVC Plastic | Dark Gray | 185 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 29/32" | 4 | 4 1/2" | 1 1/8" | PVC Plastic | Dark Gray | 160 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 9/32" | 3 | 3 1/2" | 1 1/8" | PVC Plastic | Dark Gray | 345 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 5/16" | 2 | 2 3/8" | 7/8" | PVC Plastic | Dark Gray | 345 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 25/32" | 4 | 4 1/2" | 1 1/8" | PVC Plastic | Dark Gray | 345 psi @ 72° F | 0000000 | 00000 |
| 1 | 9/32" | 3 | 3 1/2" | 2 1/4" | PVC Plastic | Dark Gray | 315 psi @ 72° F | 0000000 | 00000 |
| 1 | 5/16" | 2 | 2 3/8" | 1 1/8" | PVC Plastic | Dark Gray | 315 psi @ 72° F | 0000000 | 00000 |
| 1 | 13/32" | 4 | 4 1/2" | 1 1/8" | PVC Plastic | Dark Gray | 315 psi @ 72° F | 0000000 | 00000 |
| 1 | 5/8" | 6 | 6 5/8" | 1 1/8" | PVC Plastic | Dark Gray | 315 psi @ 72° F | 0000000 | 000000 |
| 1 1/2 | 13/32" | 4 | 4 1/2" | 1 3/4" | PVC Plastic | Dark Gray | 235 psi @ 72° F | 0000000 | 00000 |
| 1 1/2 | 23/32" | 3 | 3 1/2" | 2 1/4" | PVC Plastic | Dark Gray | 235 psi @ 72° F | 0000000 | 00000 |
| 2 | 3/8" | 3 | 3 1/2" | 1 1/8" | PVC Plastic | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 2 | 7/16" | 4 | 4 1/2" | 2 1/4" | PVC Plastic | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 2 | 11/16" | 6 | 6 5/8" | 2 1/4" | PVC Plastic | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 3 | 17/32" | 4 | 4 1/2" | 3" | PVC Plastic | Dark Gray | 185 psi @ 72° F | 0000000 | 000000 |
| 3 | 11/16" | 6 | 6 5/8" | 3" | PVC Plastic | Dark Gray | 185 psi @ 72° F | 0000000 | 000000 |