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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.
More
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.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water, Oil, Natural Gas
- Max.Temperature: 180° F
Low-Pressure Brass and Bronze Threaded Pipe Fittings
Use these fittings in low-pressure flow applications. They have good corrosion resistance. Fittings rated for use with drinking water meet NSF/ANSI 61 safety standards.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With:
NPT: Air, Drinking Water, Natural Gas, Oil
BSPT: Air, Natural Gas, Oil, Steam, Water - Class: 125
- Specifications Met:
NPT: ANSI/ASME B1.20.1, ANSI/ASME B16.15, NSF/ANSI 61
BSPT: ASTM B584, BS21 - Pipe Nipples and Pipe: Use Schedule 40 brass
- Flanges:
NPT: Use Class 150 brass
BSPT: Use Class 150 bronze
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 200 psi @ 72° F | __ | Brass | 00000000 | 000000 |
| 1/4 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 3/8 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 1/2 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 3/4 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 1 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 1 1/4 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 1 1/2 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 2 | 200 psi @ 72° F | __ | Brass | 00000000 | 00000 |
| 2 1/2 | 200 psi @ 72° F | __ | Brass | 00000000 | 000000 |
| 3 | 200 psi @ 72° F | __ | Brass | 00000000 | 000000 |
BSPT Female | |||||
| 1/8 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 1/4 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 3/8 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 1/2 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 3/4 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 1 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 1 1/4 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 1 1/2 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 00000 |
| 2 | 200 psi @ 72° F | 125 psi @ 400° F | Bronze | 00000000 | 000000 |
Low-Pressure Chrome-Plated Brass Threaded Pipe Fittings
The polished chrome plating not only has a shiny appearance, but also improves corrosion resistance. Also known as Class 125 fittings, these are for use in low-pressure pipe lines.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Class: 125
- Specifications Met: ASTM B456
- Pipe Nipples and Pipe: Use Schedule 40 brass
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | ||||
|---|---|---|---|---|
| 1/8 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 000000 |
| 1/4 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 3/8 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 1/2 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 3/4 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 1 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
Medium-Pressure Brass and
Bronze Threaded Pipe Fittings
Choose these fittings when you need better strength than our low-pressure brass and bronze pipe fittings. They offer good corrosion resistance.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water
- Class: 250
- Specifications Met: ANSI/ASME B1.20.1, ANSI/ASME B16.15, ASTM B584
- Pipe Nipples and Pipe: Use Schedule 80 brass
| Pipe Size | Max. Pressure | Material | Each | |
NPT Female | ||||
|---|---|---|---|---|
| 1/4 | 400 psi @ 72° F | Brass | 0000000 | 000000 |
| 3/8 | 400 psi @ 72° F | Brass | 0000000 | 00000 |
| 1/2 | 400 psi @ 72° F | Brass | 0000000 | 00000 |
| 3/4 | 400 psi @ 72° F | Brass | 0000000 | 00000 |
| 1 | 400 psi @ 72° F | Brass | 0000000 | 00000 |
| 1 1/4 | 400 psi @ 72° F | Brass | 0000000 | 000000 |
| 1 1/2 | 400 psi @ 72° F | Brass | 0000000 | 000000 |
| 2 | 400 psi @ 72° F | Brass | 0000000 | 000000 |
Bronze Unthreaded Pipe Fittings
Snap a brazing ring (sold separately) into these fittings and braze them to unthreaded pipe for a strong, leak-resistant connection. Fittings are also known as Silbraze fittings. They are bronze, which is compatible with brass and has good corrosion resistance.
Union connectors separate into three pieces so you can access your line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Steam, Water, Natural Gas
- Specifications Met: MIL-F-1183
- Pipe Nipples and Pipe: Use Schedule 40 brass
Fittings | Brazing Rings | |||||
|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
| 1/2 | 200 psi @ 72° F | 200 psi @ 425° F | 0000000 | 000000 | 0000000 | 00000 |
| 3/4 | 200 psi @ 72° F | 200 psi @ 425° F | 0000000 | 00000 | 0000000 | 0000 |
| 1 | 200 psi @ 72° F | 200 psi @ 425° F | 0000000 | 00000 | 0000000 | 0000 |
| 1 1/2 | 200 psi @ 72° F | 200 psi @ 425° F | 0000000 | 000000 | 0000000 | 0000 |
| 2 | 200 psi @ 72° F | 200 psi @ 425° F | 0000000 | 000000 | 0000000 | 0000 |
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 D1784 specifications and testing requirements for material quality.
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 metal threads, use PTFE tape. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
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: Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784
- Pipe Nipples and Pipe: Use Schedule 80 Brass, Copper, PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Fittings with stainless steel collar have a reinforcement on the female threads to prevent the threads from cracking.
Fittings with metal threads allow you to transition to a brass, copper, or stainless steel pipe or fitting.
Unions separate into three pieces so you can access your line.
| Pipe Size | Socket Depth | Material | Collar Material | Threaded Insert Material | O-Ring Material | Color | Each | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2 | 7/8" | PVC Plastic | Stainless Steel | Brass | EPDM Rubber | Dark Gray | 00000000 | 000000 |
| 3/4 | 1" | PVC Plastic | Stainless Steel | Brass | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 1 | 1 1/8" | PVC Plastic | Stainless Steel | Brass | EPDM Rubber | Dark Gray | 00000000 | 00000 |
| 1 1/4 | 1 1/4" | PVC Plastic | Stainless Steel | Brass | EPDM Rubber | Dark Gray | 00000000 | 000000 |
| 1 1/2 | 1 3/8" | PVC Plastic | Stainless Steel | Brass | EPDM Rubber | Dark Gray | 00000000 | 000000 |
| 2 | 1 1/2" | PVC Plastic | Stainless Steel | Brass | EPDM Rubber | Dark Gray | 00000000 | 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.
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 metal threads, use PTFE tape. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
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: Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784
- Pipe Nipples and Pipe: Use Schedule 40 Brass, PVC Plastic
- Flanges: Use Schedule 40 PVC Plastic
Fittings with stainless steel collar have a reinforcement on the female threads to prevent the threads from cracking.
Fittings with metal threads allow you to transition to a brass or bronze pipe or fitting.
Unions separate into three pieces so you can access your line.
| Pipe Size | Socket Depth | Material | Collar Material | Threaded Insert Material | O-Ring Material | Color | Each | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 1 7/64" | PVC Plastic | Stainless Steel | Brass | Buna-N Rubber | White | 00000000 | 000000 |
| 1 1/4 | 1 13/64" | PVC Plastic | Stainless Steel | Brass | Buna-N Rubber | White | 00000000 | 000000 |
| 1 1/2 | 1 25/64" | PVC Plastic | Stainless Steel | Brass | Buna-N Rubber | White | 00000000 | 000000 |
| 2 | 1 15/32" | PVC Plastic | Stainless Steel | Brass | Buna-N Rubber | White | 00000000 | 000000 |