Upgrade your HVAC zoning system with the Taco SR504-EXP-4 Switching Relay. Designed for reliability and ease of use, this relay works with Taco's full line of zone valve controls to help you manage heating and cooling in different areas of your home or building. It features front diagnostic lights so you can quickly check system status, switchable priority settings for flexible control, and built-in priority protection to prevent issues. The wiring is simplified to save you time during installation, and every unit is 100% factory tested to ensure quality. Compatible with Taco thermostats, circulators, and add-on controls, this relay is a trusted choice for hydronic zoning systems. Whether you're a pro installer or a savvy DIYer, the SR504-EXP-4 makes zoning smarter and more efficient.
