Description
The Watts 0559116 LFMMV-UT-M1 is a 1/2″ NPT lead-free thermostatic mixing valve engineered to deliver consistent, tempered water to fixtures and equipment in residential and light commercial plumbing and hydronic systems. Designed under the Watts LFMMV-UT series, this valve automatically blends hot and cold water supplies to maintain a safe, stable outlet temperature — helping protect end users from scalding while also preventing the conditions that promote Legionella bacteria growth.
Built to lead-free standards in compliance with NSF/ANSI 61 and NSF/ANSI 372, the LFMMV-UT-M1 is suitable for potable water applications where code compliance and occupant safety are paramount. The compact, in-line design with 1/2″ NPT connections makes installation straightforward in tight spaces, and the thermostatic cartridge provides reliable, self-regulating temperature control without the need for external power.
Key Features
- Lead-free construction — compliant with NSF/ANSI 61 & NSF/ANSI 372 for potable water use
- 1/2″ NPT male inlet/outlet connections for standard pipe compatibility
- Thermostatic mixing cartridge automatically blends hot and cold water to a set outlet temperature
- Protects against scalding and helps reduce Legionella risk
- Compact, in-line design ideal for residential and light commercial installations
- No external power required — fully self-actuating thermostatic operation
- Durable brass body construction for long service life
Typical Applications
- Domestic hot water tempering at point of use
- Lavatory and sink mixing for scald protection
- Hydronic radiant heating systems requiring tempered supply water
- Boiler protection and return water tempering
- Light commercial plumbing systems
Product Specifications
- SKU: 0559116
- Model: LFMMV-UT-M1
- Connection Size: 1/2″ NPT
- Connection Type: NPT (National Pipe Thread)
- Lead-Free: Yes
- Brand: Watts
