PRECISE AND RELIABLE SINGLE ZONE HEATING CONTROL Upgrade or repair your hydronic heating system with the SR501-4 Switching Relay. Engineered as a direct replacement for the industry-standard Taco SR501, this relay restores precise control to a single heating zone, ensuring efficient and comfortable heat delivery to radiators, baseboards, or convectors. EFFORTLESS REPLACEMENT FOR CONTINUOUS COMFORT A failing relay can leave a room cold and uncomfortable. The SR501-4 is designed for a hassle-free swap, minimizing downtime and restoring heat quickly. With its familiar layout and clear terminal design, installation is straightforward, getting your system back to optimal performance with minimal effort. BUILT FOR SAFETY AND LONG-TERM RELIABILITY Operating on low-voltage 24V power, this relay integrates safely with your existing system controls. Constructed with quality components, it is built to handle the demands of daily use, providing a dependable solution that protects your comfort and your investment. THE SMART CHOICE FOR SYSTEM MAINTENANCE Whether you're a professional HVAC technician or a knowledgeable homeowner, the SR501-4 is the smart, cost-effective choice for repairing a single-zone heating system without replacing the entire control panel. Ensure your heating system operates reliably when you need it most. IDEAL FOR USE IN: * Residential Hydronic Heating Systems * Replacement for faulty Taco SR501 relays * Single Zone Control for Baseboard Heaters or Radiators * Boiler Control Systems