{"title":"Switching Relay","description":"","products":[{"product_id":"switching-relay-1-zone-w-fused-outputs","title":"SR501-5 - 1 Zone Switching Relay with Fused Outputs","description":"\u003cp\u003e\u003cstrong\u003eTaco SR501-5 - 1 Zone Switching Relay w\/Fused Outputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Taco SR501-5 is a next-generation single-zone switching relay designed to control circulators in hydronic heating systems. Built for fast installs and easy troubleshooting, it features clearly labeled wiring, external diagnostic lights, and a compact enclosure. Ideal for residential and light commercial applications, this relay provides reliable zone control while integrating seamlessly with a wide range of thermostats and boilers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: Taco Comfort Solutions\u003c\/li\u003e\n\u003cli\u003ePart Number: SR501-5\u003c\/li\u003e\n\u003cli\u003eApplication: Single-zone switching relay for hydronic heating systems\u003c\/li\u003e\n\u003cli\u003eVoltage: 120V power input with 24V thermostat compatibility\u003c\/li\u003e\n\u003cli\u003eCompatible with conventional, programmable, and WiFi thermostats\u003c\/li\u003e\n\u003cli\u003eControls circulators or zone valves in heating systems\u003c\/li\u003e\n\u003cli\u003eExternal diagnostic indicator lights for quick system status and troubleshooting\u003c\/li\u003e\n\u003cli\u003eBuilt-in priority protection and isolated end switch for boiler activation\u003c\/li\u003e\n\u003cli\u003eFuse protected with sealed relay for long-term durability\u003c\/li\u003e\n\u003cli\u003eContractor-friendly PC board layout for simplified wiring and installation\u003c\/li\u003e\n\u003cli\u003eCompact design suitable for residential or light commercial applications\u003c\/li\u003e\n\u003cli\u003eUL listed for safety and reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHot Water Heating Systems\u003c\/li\u003e\n\u003cli\u003eClosed Cooling Circuits\u003c\/li\u003e\n\u003cli\u003eAir Conditioning Systems\u003c\/li\u003e\n\u003cli\u003eHydronic Heating \u0026amp; Cooling\u003c\/li\u003e\n\u003cli\u003eWater\/Glycol concentrations up to 50%\u003c\/li\u003e\n\u003cli\u003eSolar \/ Geothermal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: right;\"\u003e\u003csup\u003e\u003cspan style=\"color: #999999;\"\u003ePKZ1900082\u003c\/span\u003e\u003c\/sup\u003e\u003c\/p\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":32805682413622,"sku":"SR501-5","price":112.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/6150\/2518\/files\/taco_SR501-5_1_wm.jpg?v=1776230767"},{"product_id":"switching-relay-2-zone-w-priorty","title":"SR502-4 - 2 Zone Switching Relay with Priority","description":"\u003cp\u003e\u003cstrong\u003eTaco SR502-4 - 2 Zone Switching Relay w\/Priority\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Taco Switching Relay is the best choice for all your zoning needs, with advanced timer and boiler functions, external diagnostic lights, switchable priority and contractor friendly PC board layouts. Combined with the time proven reliability of the 00 family of circulators and thermostats, total system integration is achieved. Additional features include built-in priority protection, premium sealed relays, compact design, fuse protected, isolated end switch and universal thermostat compatibility.\u003c\/p\u003e\n\u003cp\u003eTaco Switching Relays combine clearly labeled PC board layouts with advanced features that allow for total system customization. Whether using basic priority switching or the advanced features of the -EXP controls, the job is made easy. External indicator lights provide instant diagnostic feedback, making a snap of service calls or new installation start-ups. All switching relays are UL listed, are compatible with conventional and programmable thermostats.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFront Diagnostic Lights\u003c\/li\u003e\n\u003cli\u003eSwitchable Priority\u003c\/li\u003e\n\u003cli\u003eBuilt-in Priority Protection\u003c\/li\u003e\n\u003cli\u003eSimplified Wiring\u003c\/li\u003e\n\u003cli\u003ePremium Sealed Relays\u003c\/li\u003e\n\u003cli\u003eCompact Design\u003c\/li\u003e\n\u003cli\u003eFuse Protected\u003c\/li\u003e\n\u003cli\u003e100% Factory Tested\u003c\/li\u003e\n\u003cli\u003eIsolated End Switch\u003c\/li\u003e\n\u003cli\u003eContractor Friendly PC Board Layout\u003c\/li\u003e\n\u003cli\u003eUniversal Thermostat\u003c\/li\u003e\n\u003cli\u003eCompatibility\u003c\/li\u003e\n\u003cli\u003e24 Volt Power Output for hard wired thermostats\u003c\/li\u003e\n\u003cli\u003eField Replaceable Transformer\u003c\/li\u003e\n\u003cli\u003eUL Approved\u003c\/li\u003e\n\u003cli\u003eExtended 3 Year Warranty\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: right;\"\u003e\u003csup\u003e\u003cspan style=\"color: #999999;\"\u003ePKZ1900085\u003c\/span\u003e\u003c\/sup\u003e\u003c\/p\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":32805682446390,"sku":"SR502-4","price":226.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/6150\/2518\/files\/3a3b2556-1224-4486-8211-acda81022000.jpg?v=1739318376"},{"product_id":"switching-relay-4-zone-w-priority-fused-output","title":"SR504-4 - 4 Zone Switching Relay with Priority","description":"\u003cp\u003eSWITCHING RELAY 4-ZONE W\/PRIORITY FUSED OUTPUT\u003c\/p\u003e\n\u003cp\u003eThe Taco Switching Relay is the best choice for all your zoning needs, with advanced timer and boiler functions, external diagnostic lights, switchable priority and contractor friendly PC board layouts. Combined with the time proven reliability of the 00® family of circulators and thermostats, total system integration is achieved. Additional features include built-in priority protection, premium sealed relays, compact design, fuse protected, isolated end switch and universal thermostat compatibility.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: right;\"\u003e\u003cspan style=\"color: #999999;\"\u003ePKZ1900095\u003c\/span\u003e\u003c\/p\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":32805682544694,"sku":"SR504-4","price":303.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/6150\/2518\/products\/taco_sr504-4.jpg?v=1664180989"},{"product_id":"switching-relay-w-priority6-z0ne","title":"SR506-4 - 6 Zone Switching Relay with Priority","description":"\u003cp\u003eSWITCHING RELAY W\/PRIORITY6-Z0NE\u003c\/p\u003e\n\u003cp\u003eThe Taco Switching Relay is the best choice for all your zoning needs, with advanced timer and boiler functions, external diagnostic lights, switchable priority and contractor friendly PC board layouts. Combined with the time proven reliability of the 00® family of circulators and thermostats, total system integration is achieved. Additional features include built-in priority protection, premium sealed relays, compact design, fuse protected, isolated end switch and universal thermostat compatibility.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: right;\"\u003e\u003cspan style=\"color: #999999;\"\u003ePKZ1900100\u003c\/span\u003e\u003c\/p\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":32805682610230,"sku":"SR506-4","price":372.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/6150\/2518\/products\/sr506-4.jpg?v=1601326089"},{"product_id":"valve-control-3-zone","title":"ZVC403-5 - 3 Zone Valve Control with Priority, Bluetooth \u0026 Taco Control App","description":"\u003cp\u003e\u003cstrong\u003eTaco ZVC403-5 - 3 Zone Valve Control with Priority, Bluetooth \u0026amp; Taco Control App\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Taco ZVC403-5 3-Zone Next Generation Valve Control with Priority is a clean, reliable way to manage up to three heating zones using 24V zone valves. Built for hydronic systems, it gives you simple thermostat inputs, clear diagnostic LEDs, and a built-in priority switch to protect your domestic hot water zone when needed. With a compact layout and easy wiring, the ZVC403-5 helps streamline installs, reduce troubleshooting time, and keep multi-zone systems running smooth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: ZVC403-5 (Replaces ZVC403-4)\u003c\/li\u003e\n\u003cli\u003eZones: 3 zone valve outputs (24 VAC)\u003c\/li\u003e\n\u003cli\u003eApplication: Hydronic heating zone control for zone valves\u003c\/li\u003e\n\u003cli\u003ePriority: Built-in priority zone function (commonly used for DHW)\u003c\/li\u003e\n\u003cli\u003eThermostat Inputs: 3 thermostat connections (one per zone)\u003c\/li\u003e\n\u003cli\u003eEnd Switch: Isolated end switch for boiler\/primary pump demand\u003c\/li\u003e\n\u003cli\u003eDiagnostics: LED indicators for power, thermostat call, and zone status\u003c\/li\u003e\n\u003cli\u003eWiring: Clearly labeled terminals for fast, clean installation\u003c\/li\u003e\n\u003cli\u003eDesign: Next Generation control board for improved reliability and serviceability\u003c\/li\u003e\n\u003cli\u003eCompatibility: Works with most 2-wire and 3-wire 24V zone valves (verify valve requirements)\u003c\/li\u003e\n\u003cli\u003eMounting: Compact enclosure for wall mounting near boiler\/mechanical room equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: right;\"\u003e\u003csup\u003e\u003cspan style=\"color: #999999;\"\u003ePKZ1900101\u003c\/span\u003e\u003c\/sup\u003e\u003c\/p\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":32805684903990,"sku":"ZVC403-4","price":197.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/6150\/2518\/files\/taco_ZVC403-4_1_wm.jpg?v=1768892133"},{"product_id":"valve-control-5-zone","title":"ZVC405-5 - 5 Zone Valve Control with Priority, Bluetooth \u0026 Taco Control App","description":"\u003cp\u003e\u003cstrong\u003eTaco ZVC405-5 - 5 Zone Valve Control with Priority, Bluetooth \u0026amp; Taco Control App\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Taco ZVC405-5 5-Zone Next Generation Valve Control with Priority is a clean, reliable way to manage up to five heating zones using 24V zone valves. Built for hydronic systems, it provides simple thermostat inputs, clear diagnostic LEDs, and a priority function that can help protect an indirect water heater zone when needed. With Bluetooth connectivity and Taco’s mobile app support, the ZVC405-5 also makes setup and adjustments easier without digging back into the wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: ZVC405-5\u003c\/li\u003e\n\u003cli\u003eZones: 5 zone valve outputs (24 VAC)\u003c\/li\u003e\n\u003cli\u003eApplication: Hydronic heating zone control for systems using zone valves\u003c\/li\u003e\n\u003cli\u003ePriority: Built-in priority zone function (commonly used for indirect DHW)\u003c\/li\u003e\n\u003cli\u003eThermostat Inputs: 5 thermostat connections (one per zone)\u003c\/li\u003e\n\u003cli\u003eEnd Switches: Dual isolated end switches for boiler\/system demand control\u003c\/li\u003e\n\u003cli\u003eDiagnostics: LED indicators for power, thermostat calls, and zone activity\u003c\/li\u003e\n\u003cli\u003eProtection: Fully fuse protected for added reliability\u003c\/li\u003e\n\u003cli\u003eBluetooth Enabled: Connects via Bluetooth for wireless access and configuration\u003c\/li\u003e\n\u003cli\u003eApp Support: Compatible with the Taco Control mobile app for setup, adjustments, and advanced settings\u003c\/li\u003e\n\u003cli\u003eCompatibility: Supports most 2-, 3-, and 4-wire 24V zone valves (verify valve requirements)\u003c\/li\u003e\n\u003cli\u003eWiring: Clearly labeled screw terminals for fast, clean installation\u003c\/li\u003e\n\u003cli\u003eMounting: Compact enclosure designed for wall mounting in mechanical rooms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: right;\"\u003e\u003csup\u003e\u003cspan style=\"color: #999999;\"\u003ePKZ1900103\u003c\/span\u003e\u003c\/sup\u003e\u003c\/p\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":32805685231670,"sku":"ZVC405-4","price":233.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/6150\/2518\/files\/taco_zvc405-4_1_wm.jpg?v=1731538903"},{"product_id":"valve-control-6-zone","title":"ZVC406-5 - 6 Zone Valve Control with Priority, Bluetooth \u0026 Taco Control App","description":"\u003cp\u003e\u003cstrong\u003eTaco ZVC406-5 – 6 Zone Valve Control with Priority\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Taco ZVC406-5 is a zone valve control panel designed for managing up to six zones in hydronic heating systems. It offers a priority function, typically used for domestic hot water, ensuring uninterrupted service when needed. With LED diagnostics, fuse protection, and simplified wiring for 2-, 3-, or 4-wire zone valves, the ZVC406-5 streamlines installation and troubleshooting. It’s expandable up to 120 zones and includes advanced features like post-purge, pump exercise, and Bluetooth-enabled configuration for easy setup and monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: Taco\u003c\/li\u003e\n\u003cli\u003ePart Number: ZVC406-5\u003c\/li\u003e\n\u003cli\u003eZones: 6 zones with priority control (priority zone disables others when active)\u003c\/li\u003e\n\u003cli\u003eInput Voltage: 120 VAC, 60 Hz\u003c\/li\u003e\n\u003cli\u003eTransformer Capacity: Dual 40 VA (80 VA total) Class II transformers\u003c\/li\u003e\n\u003cli\u003eCompatible Valves: 2-, 3-, or 4-wire, 24 VAC zone valves\u003c\/li\u003e\n\u003cli\u003eEnd Switch Ratings: 120 VAC, 5 A (pump); 24 VAC, 1 A (main\/priority)\u003c\/li\u003e\n\u003cli\u003eIndicators: LED diagnostics for clear fault and operation status\u003c\/li\u003e\n\u003cli\u003eProtection: Built-in fuse protection\u003c\/li\u003e\n\u003cli\u003eSmart Features: Post-purge, pump exercise, SmartPlus DHW recirculation logic\u003c\/li\u003e\n\u003cli\u003eConnectivity: Bluetooth app configuration and Modbus support\u003c\/li\u003e\n\u003cli\u003eExpansion: Linkable up to 120 zones with EXP relays\u003c\/li\u003e\n\u003cli\u003eCertifications: UL and CSA listed\u003c\/li\u003e\n\u003cli\u003eWarranty: 3 years\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003cp style=\"text-align: right;\"\u003e\u003csup\u003e\u003cspan style=\"color: #999999;\"\u003ePKZ2020053\u003c\/span\u003e\u003c\/sup\u003e\u003c\/p\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":32805685264438,"sku":"ZVC406-5","price":299.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/6150\/2518\/files\/558b69c9-ee42-4359-a82c-f7285844ecd9.jpg?v=1755807082"}],"url":"https:\/\/www.supplystop.com\/collections\/pumpshtype-switching-relay\/pumps.oembed","provider":"SupplyStop.com","version":"1.0","type":"link"}