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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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.
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:
PVC Plastic Fittings: Drinking Water, Water
Nylon Fittings: Water - Maximum Temperature:
PVC Plastic Fittings: 140° F
Nylon Fittings: 180° F - Specifications Met:
PVC Plastic Fittings: ASTM D1784, NSF/ANSI 61
Nylon Plastic Fittings: ASTM D4066 - Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size (A)  | Pipe Size (B) | Material | Color | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 3/8 | 1/4 | Nylon Plastic | Red | 0000000 | 00000 |
| 1/2 | 3/8 | Nylon Plastic | Red | 0000000 | 0000 |
| 3/4 | 1/2 | Nylon Plastic | Red | 0000000 | 0000 |
| 1 | 3/4 | Nylon Plastic | Red | 0000000 | 0000 |
| 1 1/4 | 1 | Nylon Plastic | Red | 0000000 | 0000 |
| 1 1/2 | 1 1/4 | Nylon Plastic | Red | 0000000 | 0000 |
| 2 | 1 1/2 | Nylon Plastic | Red | 0000000 | 0000 |
| 2 1/2 | 2 | Nylon Plastic | Red | 0000000 | 00000 |