Description
Mueller Industries A17921 NPTFE x NPTFI C/O Manifold Overview
The Mueller Industries A17921 is a close-off (C/O) manifold featuring NPT Female External (NPTFE) and NPT Female Internal (NPTFI) connections. Engineered for dependable performance in HVAC, refrigeration, and plumbing distribution applications, this manifold provides a secure, leak-resistant connection point for multi-circuit piping systems.
Key Features
- NPTFE x NPTFI connection configuration for versatile installation
- Close-off (C/O) manifold design for controlled flow distribution
- Manufactured by Mueller Industries — a trusted name in HVAC and plumbing fittings
- Durable construction suitable for demanding HVAC and hydronic piping systems
- Threaded NPT connections ensure a secure, reliable seal
Applications
- HVAC piping distribution systems
- Hydronic heating and cooling circuits
- Refrigeration manifold assemblies
- Commercial and residential plumbing installations
Why Choose Mueller Industries?
Mueller Industries is a globally recognized manufacturer of copper, brass, and plastic fittings and components. Their products are engineered to meet the rigorous demands of HVAC, refrigeration, and plumbing professionals, delivering consistent quality and long-term reliability on every job.







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