Description
The Watts 0386473 is a 1/2″ B911T-M3 series backflow preventer featuring convenient press-fit end connections, engineered to provide dependable cross-connection control and protect potable water supplies from contamination and back-siphonage in residential and light commercial hydronic and plumbing systems.
Product Overview
Designed for ease of installation and long-term reliability, the B911T-M3 combines Watts’ proven backflow prevention technology with press-fit connections that eliminate the need for soldering or threading — saving installation time and reducing the risk of field errors. The compact 1/2″ body size makes it well-suited for tight mechanical spaces and retrofit applications.
Key Features
- 1/2″ pipe size for residential and light commercial applications
- Press-fit end connections for fast, flame-free installation
- B911T-M3 series design for reliable backflow and back-siphonage protection
- Compact body profile suitable for space-constrained installations
- Watts quality construction for long service life and consistent performance
- Compatible with hydronic heating and potable water plumbing systems
Applications
- Residential and light commercial plumbing systems
- Hydronic heating and cooling systems
- Cross-connection control on domestic water lines
- Retrofit and new construction installations
Why Choose Watts?
Watts is a globally recognized leader in flow control and water quality products. The B911T-M3 series reflects Watts’ commitment to code-compliant, high-performance backflow prevention solutions trusted by plumbing and HVAC professionals worldwide.







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