Caleffi 520510AX

Caleffi 520510AX is a high-precision Mixcal 3-Way Mixing Valve with 3/4" FNPT connections, engineered for reliable temperature control in domestic hot water and radiant heating systems. This versatile valve blends hot and cold water to deliver stable outlet temperatures while maximizing energy efficiency. Ideal for retrofits and new installs alike, it integrates with standard plumbing fittings and offers dependable, maintenance-friendly operation.

Designed for flexible installation, the valve features 3/4" FNPT tank and hose connections, a 3/4" MNPT with gauge for accurate monitoring, and a cross-configuration that simplifies plumbing layouts. Constructed from durable materials, it withstands daily use in demanding environments, and the integrated gauge helps you verify performance at a glance. It suits a range of system pressures and is compatible with common hydronic setups in residential, commercial, and solar thermal applications.

• 3/4" FNPT tank and hose connections for versatile installation
• 3/4" MNPT with gauge enables precise pressure and temperature monitoring
• Cross configuration supports multiple piping layouts
• Durable construction designed for long service life
• Energy-efficient temperature blending reduces waste and improves comfort

Whether you are an installer or a DIYer, the Mixcal 3-Way Mixing Valve provides precise temperature control, reduces thermal shock, and offers a compact footprint that fits tight spaces.