Description
The Watts LFMMV 3/4 in. Lead-Free Thermostatic Mixing Valve (SKU 0559118) is a precision-engineered solution for controlling and maintaining safe, consistent hot water delivery temperatures in residential and commercial plumbing and hydronic systems. Featuring union sweat (solder) end connections for a secure, leak-resistant installation, this valve automatically blends hot and cold water supplies to deliver a stable, pre-set outlet temperature — protecting end users from scalding while ensuring comfort and code compliance.
Constructed to lead-free standards, the LFMMV is compliant with NSF/ANSI 61 and NSF/ANSI 372 requirements, making it suitable for potable water applications where lead content regulations apply. The union-style sweat connections simplify installation and future serviceability, allowing the valve body to be removed without disturbing the piping.
Key Features
- Lead-free (LF) construction — compliant with NSF/ANSI 61 & 372 and applicable safe drinking water regulations
- 3/4 in. union sweat (solder) end connections for secure, serviceable installation
- Thermostatic mixing action automatically blends hot and cold water to a consistent outlet temperature
- Protects against scalding and thermal shock in potable water and hydronic applications
- Union-style connections allow valve removal without cutting pipe
- Durable construction designed for long-term reliability in demanding plumbing environments
- Suitable for residential and light commercial water heating systems, point-of-use, and whole-building applications
Specifications
- Brand: Watts
- SKU / Part Number: 0559118
- Model: LFMMV
- Valve Type: Thermostatic Mixing Valve
- Connection Size: 3/4 in.
- Connection Type: Union Sweat (Solder)
- Lead-Free: Yes
Applications
- Domestic hot water tempering and anti-scald protection
- Point-of-use and whole-building mixing valve installations
- Hydronic heating systems requiring precise supply water temperature control
- Commercial and residential plumbing systems subject to lead-free compliance requirements
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