Caleffi 521409AC

Caleffi 521409AC is the Mixcal 3-way thermostatic mixing valve designed for safe, reliable tempering of domestic hot water. Featuring 1/2" sweat connections and a built-in check valve, this valve delivers precise thermostatic control and anti-scald protection for residential and light commercial applications.

Designed to blend hot and cold water automatically, the Mixcal 3-way valve maintains a consistent outlet temperature despite changes in supply pressure or flow. The compact brass body ensures durability, while the sweat connection options simplify installation in tight spaces. Optimized for reliable performance in residential hot-water systems, its thermostatic element reacts quickly to temperature shifts, reducing fluctuations and helping conserve energy. Ideal for tempering water in showers, sinks, or radiant floor applications.

• 3-way design provides reliable temperature blending for steady output.
• Thermostatic control automatically maintains the chosen setpoint for comfort and safety.
• 1/2" sweat connections allow easy piping and retrofit in existing lines.
• Built-in check valve prevents backflow and cross-connection, protecting potable water.
• Durable construction offers long service life in demanding environments.