Overview
Anvil 150 Union Fitting 1-1/2″ — Class 150 Malleable Iron Union
The Anvil 0312822166 is a Class 150 malleable iron union fitting designed for 1-1/2″ NPT applications. This female-to-female threaded union provides dependable connections in plumbing, hydraulic, pneumatic, and pump systems where secure, leak-free joint integrity is essential.
Key Features
- Material: Malleable iron construction for durability and corrosion resistance
- Connection: FNPT (female National Pipe Thread) on both ends
- Pressure Rating: Class 150, UL/FM approved at 300 PSI
- Standards Compliance: Manufactured to ASME B16.3, ASME B16.39, and ASME B1.20.1
- Testing: Gas tested at minimum 100 PSI; meets strict Anvil quality standards
- Approvals: UL Listed, FM Approved, NSF 61 certified
Technical Specifications
- Pipe Size: 1-1/2″
- Connection Type: FNPT (Female NPT)
- Material: Malleable Iron
- Class: 150
- Pressure Rating: 300 PSI WOG (Water, Oil, Gas) / 150 PSI SWP (Steam)
- Temperature Range: -20°F to 450°F
- Manufacturer: Anvil International
- Part Number: 0312822166
- Standards: ASME B16.3, ASME B16.39, ASME B1.20.1, ASTM A197
- Certifications: UL Listed, FM Approved, NSF 61
Typical Applications
- Water and air piping systems in industrial facilities
- Hydraulic and pneumatic pump connections
- Commercial and residential plumbing
- Process piping requiring reliable, removable connections
- Systems requiring pressure ratings up to 300 PSI
Compatibility & Replacements
Compatible With
- 1-1/2″ NPT threaded pipe and fittings
- Black iron pipe systems
- Galvanized steel piping (with appropriate thread sealant)
- Industrial plumbing and hydraulic systems rated for Class 150
Replaces / Drop-In Replacement For
- Anvil Fig. 463 Class 150 Union 1-1/2″ assemblies
- Other Class 150 malleable iron 1-1/2″ NPT unions in equivalent duty
Works With
- Thread sealant tape (PTFE) or anaerobic thread sealant (recommended for vibration-resistant connections)
- Standard pipe wrenches and union nut tools
- All NPT-compatible pressure gauges and flow meters





