Moen 104451 Thermostatic Mixing Valve (1/2" IPS, Adjustable Temperature)

Ensure safe, consistent water temperature and reliable performance with the Moen 104451 Thermostatic Mixing Valve. Designed for commercial and residential applications alike, this high-performance valve blends hot and cold water to deliver a stable, pre-set output temperature—helping prevent scalding while maintaining user comfort.

Built with a durable brass body and advanced thermostatic technology, the 104451 features an adjustable temperature control cartridge that automatically compensates for fluctuations in water pressure or supply temperature. This ensures a steady, dependable output even in demanding environments such as multi-user bathrooms, healthcare facilities, or high-traffic commercial spaces.

Engineered for long-term reliability, this valve includes integrated hot and cold check valves to prevent backflow and cross-contamination, along with a stainless steel internal strainer to protect against debris in the water line. With its compact footprint and versatile connection options, the Moen 104451 is an ideal solution for point-of-use temperature control in lavatories, showers, and other plumbing fixtures.

Key Features & Benefits

• Thermostatic Mixing Technology – Automatically maintains consistent outlet temperature for safety and comfort
• Adjustable Temperature Range – Factory preset at 105°F, adjustable from approximately 95°F to 120°F
• Anti-Scald Protection – Helps prevent sudden temperature spikes caused by pressure fluctuations
• Durable Brass Construction – Built for long-lasting performance in commercial or residential use
• 3-Port Valve Design – Efficiently blends hot and cold water supplies
• Integrated Check Valves – Prevent backflow and cross-contamination of water lines
• Internal Stainless Steel Strainer – Protects valve from debris and extends service life
• Low Flow Operation – Designed to perform efficiently even at reduced flow rates
• 3/8" Compression Adapter Included – Flexible installation options
• Commercial-Grade Reliability – Ideal for institutional, hospitality, and multi-unit applications

Specifications

• Model: 104451
• Product Type: Thermostatic mixing valve
• Valve Size: 1/2"
• Connection Type: FNPT (female threaded IPS) with 3/8" compression adapter
• Ports: 3-port configuration
• Material: Brass body, chrome-plated finish
• Flow Rate:
• Max: ~4.9 GPM @ 45 PSI
• Minimum: ~0.35 GPM
• Temperature Range: Adjustable from 95°F to 120°F (factory preset ~105°F)
• Pressure Range: 20–125 PSI
• Temperature Accuracy: ±3.6°F
• Dimensions: Approx. 5-1/8" W x 1-1/2" D x ~3-7/8" H
• Standards Compliance: ASSE 1070, CSA B125.3, ASME A112.1070
• Certification: NSF 372 (lead compliant)
• Cartridge Type: Paraffin-based thermostatic element
• Warranty: 5-Year Limited Warranty

Important Notes

• Designed for point-of-use applications such as lavatories, showers, and commercial fixtures
• Requires proper installation with hot and cold supply lines for optimal performance
• Not a trim kit—this is a functional inline mixing valve

The Moen 104451 delivers precise temperature control, enhanced safety, and commercial-grade durability—making it a dependable choice for any plumbing system where consistent water temperature matters.