Series 412 Female NPT Thread Transition Fittings create secure, leak-proof connections between HDPE conduit and NPT-threaded equipment. This listing covers all options for 1.25\\” Female NPT Thread in a range of main sizes with a DR 7 pressure rating. Manufactured from rugged C954 Aluminum Bronze, 304 Stainless Steel, 316 Stainless Steel, or PVC, the barbed low-profile design hydraulically fuses to the pipe wall for a permanent, maintenance-free seal. Trusted for underground utility, industrial, and telecom applications.
Key Features & Benefits
✅ Leak-Proof Fusion Seal – Barbed design permanently bonds to HDPE (2\\”–24\\” diameters)
✅ Multiple Materials Available – Choose from C954 Bronze, 304 SS, 316 SS, or PVC
✅ Standard 1.25\\” NPT Thread – Complies with ANSI/ASME B1.20.1 – 2013 standards
✅ Pressure Rated DR 7 – Ideal for high-pressure conduit systems
✅ Cap-Ready Design – Install in end caps for flow control or test ports
✅ Low-Profile Configuration – Allows probe or meter insertion without extended arm fittings
Technical Specifications
Series: 412
Outlet Thread Size: 1.25\\” Female NPT
Available DR Ratings: DR 7
Main Size Compatibility: 2\\” to 4\\” HDPE conduit
Fusion Type: Barbed mechanical design with hydraulic compression
Installation Method: Hydraulic fusion per PPI butt fusion guidelines
Materials: C954 Aluminum Bronze, 304 SS, 316 SS, or PVC
Standards: ASTM D3035, D1599, D1598, D3350; ARRA compliant
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Common Applications
- Utility Metering Stations
- Industrial Process Monitoring
- Municipal and Industrial Water Systems
- Chemical and Petroleum Transfer Lines
- Geothermal System Connections
Available Configurations
| Main Size | DR Rating | Material Options | Outlet Thread |
|---|---|---|---|
| 2\\” | DR 7 | C954 Bronze, 304 SS, 316 SS, PVC | 1.25\\” Female NPT |
| 3\\” | DR 7 | C954 Bronze, 304 SS, 316 SS, PVC | 1.25\\” Female NPT |
| 4\\” | DR 7 | C954 Bronze, 304 SS, 316 SS, PVC | 1.25\\” Female NPT |
Note: All fittings include machine-finished threads and precision-machined barbs for optimal fusion and field reliability.
Note #2: This listing is for 1.25\\” Female NPT Thread outlet fittings only. Be sure to select the correct main pipe size from the dropdown menu above.
DR Compatibility Matrix
| Main Size | DR 7 | DR 9 | DR 11 | DR 17 |
|---|---|---|---|---|
| 2\\” | ✅ | ✅ | ✅ | ✅ |
| 3\\” | ✅ | ✅ | ✅ | ✅ |
| 4\\” | ✅ | ✅ | ✅ | ✅ |
| 6\\” | ❌ | ❌ | ✅ | ✅ |
| 8\\” | ❌ | ❌ | ✅ | ✅ |
| 10\\” | ❌ | ❌ | ✅ | ✅ |
| 12\\” | ❌ | ❌ | ✅ | ✅ |
| 16\\” | ❌ | ❌ | ✅ | ✅ |
| 20\\” | ❌ | ❌ | ✅ | ✅ |
| 24\\” | ❌ | ❌ | ✅ | ✅ |
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