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 Stainless Steel Threaded Pipe Fittings
Use these heavy duty fittings in high-pressure flow applications.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance. Tee outlets allow you to create a threaded outlet anywhere along a pipe. They are also known as branch connectors and are comparable to Thredolet. To install, drill a hole in your pipe to match the fitting’s pipe size and weld in place.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: MSS SP-97, ASME B31.1
Pipe Size | For Pipe Size | Ht. | Max. Pressure | Max. Steam Pressure | Each | |
304/304L Stainless Steel | ||||||
|---|---|---|---|---|---|---|
NPT Female × Butt Weld | ||||||
| 1/4 | 1/4 to 3/8 | 3/4" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1/4 | 1/2 to 36 | 3/4" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/8 | 3/8 to 1/2 | 13/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/8 | 3/4 to 36 | 13/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1/2 | 1/2 | 1" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1/2 | 3/4 to 36 | 1" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/4 | 1 1/2 to 36 | 1 1/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/4 | 3/4 to 1 1/4 | 1 1/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 | 1 1/4 to 2 1/2 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 | 1 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 | 3 to 36 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 1/4 | 1 1/4 to 1 1/2 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/4 | 2 to 3 1/2 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/4 | 4 to 36 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 6 to 36 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 1 1/2 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 2 to 2 1/2 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 3 to 5 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 4 to 6 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 8 to 36 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 2 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 2 1/2 to 3 1/2 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
316/316L Stainless Steel | ||||||
NPT Female × Butt Weld | ||||||
| 1/4 | 1/4 to 3/8 | 3/4" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1/4 | 1/2 to 36 | 3/4" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/8 | 3/8 to 1/2 | 13/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/8 | 3/4 to 36 | 13/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1/2 | 1/2 | 1" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1/2 | 3/4 to 36 | 1" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/4 | 1 1/2 to 36 | 1 1/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 3/4 | 3/4 to 1 1/4 | 1 1/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 | 1 1/4 to 2 1/2 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 | 1 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 | 3 to 36 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 00000 |
| 1 1/4 | 1 1/4 to 1 1/2 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/4 | 2 to 3 1/2 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/4 | 4 to 36 | 1 5/16" | 3,000 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 6 to 36 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 1 1/2 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 2 to 2 1/2 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 1 1/2 | 3 to 5 | 1 3/8" | 2,800 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 4 to 6 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 8 to 36 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 2 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
| 2 | 2 1/2 to 3 1/2 | 1 1/2" | 2,500 psi @ 72° F | 600 psi @ 220° F | 00000000 | 000000 |
High-Pressure Iron and Steel Threaded Pipe Fittings
These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
Tee outlets allow you to create a threaded outlet anywhere along a pipe. They are also known as branch connectors and are comparable to Thredolet. To install, drill a hole in your pipe to match the fitting’s pipe size and weld in place.
Phosphate-coated and zinc-phosphate-coated fittings offer some corrosion resistance, but aren't intended for corrosive environments.
Note: The maximum pressure listed for Class 3000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Specifications Met : ASME B31.1, ASTM A105, ASME B31.3, MSS SP-97, ASME B16.9, ASME B16.11
- Pipe Nipples and Pipe: Use Schedule 160 steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | For Pipe Size | Construction | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female × Butt Weld | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4 | 04 | 1/4 to 3/8 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 1/4 | 04 | 1/2 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 3/8 | 06 | 3/8 to 1 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 3/8 | 06 | 1 1/4 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1/2 | 08 | 1/2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1/2 | 08 | 3/4 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 3/4 | 12 | 3/4 to 1 1/4 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 3/4 | 12 | 1 1/2 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1 | 16 | 1 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 | 16 | 1 1/4 to 2 1/2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 | 16 | 3 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1 1/4 | 20 | 1 1/4 to 1 1/2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 1/4 | 20 | 2 to 3 1/2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 1/4 | 20 | 4 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1 1/2 | 24 | 1 1/2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 24 | 2 to 2 1/2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 24 | 3 to 5 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 1/2 | 24 | 6 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 2 | 32 | 2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 2 | 32 | 2 1/2 to 3 1/2 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 2 | 32 | 4 to 6 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 2 | 32 | 8 to 36 | Seamless | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 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.
To prevent leaks in threaded connections, apply a sealant to the male threads. 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 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 | For Pipe OD | For Hole Dia. | Material | Collar Material | Color | Max. Pressure | Each | |
NPT Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 2 | 2 3/8" | 3/4" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 1/2 | 3 | 3 1/2" | 7/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 4 | 4 1/2" | 1 1/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 3/4 | 2 | 2 3/8" | 7/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 3 | 3 1/2" | 7/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 4 | 4 1/2" | 1 1/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 1 | 2 | 2 3/8" | 1 1/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 1 | 3 | 3 1/2" | 1 1/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 1 | 4 | 4 1/2" | 1 1/8" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 1 1/2 | 3 | 3 1/2" | 2 1/4" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 00000 |
| 1 1/2 | 4 | 4 1/2" | 1 3/4" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 2 | 4 | 4 1/2" | 2 1/4" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 2 | 6 | 6 5/8" | 2 1/4" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
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. 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: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 40 Aluminum, Iron, PVC Plastic, Stainless Steel, Steel
- Flanges: Use Schedule 40 PVC Plastic
Fittings with stainless steel collar have a reinforcement on the female threads to prevent the threads from cracking.
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 | Socket Depth | For Pipe Size | For Pipe OD | For Hole Dia. | OD | ID | Wall Thick. | Material | Collar Material | Color | Max. Pressure | Each | |
NPT Threads | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 5/16" | 2 | 2 3/8" | 3/4" | 27/32" | 0.622" | 0.109" | PVC Plastic | Stainless Steel | White | 200 psi @ 72° F | 0000000 | 000000 |
| 3/4 | 5/16" | 2 | 2 3/8" | 7/8" | 1 3/64" | 0.824" | 0.113" | PVC Plastic | Stainless Steel | White | 200 psi @ 72° F | 0000000 | 00000 |
| 3/4 | 27/32" | 4 | 4 1/2" | 1 1/8" | 1 3/64" | 0.824" | 0.113" | PVC Plastic | Stainless Steel | White | 200 psi @ 72° F | 0000000 | 000000 |
| 1 | 5/16" | 2 | 2 3/8" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | Stainless Steel | White | 200 psi @ 72° F | 0000000 | 00000 |
| 1 | 7/16" | 4 | 4 1/2" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | Stainless Steel | White | 200 psi @ 72° F | 0000000 | 000000 |
| 2 | 11/16" | 6 | 6 5/8" | 2 1/4" | 2 3/8" | 2.067" | 0.154" | PVC Plastic | Stainless Steel | White | 200 psi @ 72° F | 0000000 | 000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Schedule 40 PVC Plastic
Tee outlet adapters 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 | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 1/8 | 1/2 | PVC Plastic | White | 00000000 | 00000 |
| 1/8 | 3/4 | PVC Plastic | White | 00000000 | 0000 |
| 1/2 | 1/2 | PVC Plastic | White | 00000000 | 0000 |
| 1/2 | 1 | PVC Plastic | White | 00000000 | 0000 |
| 1/2 | 3/4 | PVC Plastic | White | 00000000 | 0000 |
| 3/4 | 1 | PVC Plastic | White | 00000000 | 0000 |
| 3/4 | 3/4 | PVC Plastic | White | 00000000 | 0000 |
| 1 | 1 | PVC Plastic | White | 00000000 | 0000 |