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 Barbed Plastic Pipe Fittings for Water
- For Use With: Water
- Maximum Temperature: Polypropylene Plastic: 120° F
Nylon Plastic: 150° F - Specifications Met: ASTM D2609
- Pipe Nipples and Pipe: Use Semi-Flexible Polyethylene Plastic
Use these barbed pipe fittings in residential and commercial plumbing and water supply applications up to 60 psi. Also known as insert fittings, they have a barbed end that slides into semi-flexible plastic pipe and secures with a clamp (sold separately). Since you don't have to wait for cement to dry, they're quicker to install than socket-connect fittings. Fittings are plastic for good corrosion resistance. They meet ASTM D2609 specifications for barb dimensions. Nylon fittings have better impact and abrasion resistance than polypropylene fittings, but can soften when exposed to moisture.
Note: Barbed pipe fittings are measured by pipe size, which is not an actual measured size, but rather an industry designation.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
Sealants cannot be sold to Colorado, Connecticut, District of Columbia, Delaware, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, New Hampshire, New Jersey, Northern Virginia, New York, Ohio, Pennsylvania, Rhode Island, or Utah due to local VOC (Volatile Organic Compounds) regulations.
For technical drawings and 3-D models, click on a part number.
To prevent leaks in threaded connections, apply a non-hardening, plastic-compatible sealant to the male threads. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. 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.
Nylon Plastic | |||||
|---|---|---|---|---|---|
Pipe Size | Barb OD | Max. Pressure | Color | Each | |
NPT Threads | |||||
| 1/2 | 0.65" | 60 psi @ 72° F | White | 00000000 | 00000 |
| 3/4 | 0.85" | 60 psi @ 72° F | White | 00000000 | 0000 |
| 1 | 1.08" | 60 psi @ 72° F | White | 00000000 | 0000 |
| 1 1/4 | 1.41" | 60 psi @ 72° F | White | 00000000 | 0000 |
| 1 1/2 | 1.65" | 60 psi @ 72° F | White | 00000000 | 0000 |
| 2 | 2.11" | 60 psi @ 72° F | White | 00000000 | 0000 |
| Non-Hardening Thread Sealant | 000000 | Each | 000000 |
To prevent leaks in threaded connections, apply a non-hardening, plastic-compatible sealant to the male threads. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. 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.
Nylon Plastic | |||||
|---|---|---|---|---|---|
| Pipe Size | Barb OD | Max. Pressure | Color | Each | |
NPT Threads | |||||
| 1/2 | 0.65" | 60 psi @ 72° F | White | 00000000 | 00000 |
| 3/4 | 0.85" | 60 psi @ 72° F | White | 00000000 | 0000 |
| 1 | 1.08" | 60 psi @ 72° F | White | 00000000 | 0000 |
| 1 1/4 | 1.41" | 60 psi @ 72° F | White | 00000000 | 0000 |
| 1 1/2 | 1.65" | 60 psi @ 72° F | White | 00000000 | 0000 |
| Non-Hardening Thread Sealant | 000000 | Each | 000000 |
