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Taco Enhanced Zone Pump Switching Relay

Completely customize your system.

The Taco Pump 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.

Features:
  • Front Diagnostic Lights
  • Switchable Priority
  • Built-in Priority Protection
  • Simplified Wiring
  • Premium Sealed Relays
  • Compact Design
  • Fuse Protected
  • 100% Factory Tested
  • Isolated End Switch
  • Contractor Friendly PC Board Layout
  • Universal Thermostat Compatibility
  • 24 Volt Power Output for hard wired thermostats
  • Field Replaceable Transformer
  • UL Approved
  • Extended 3 Year Warranty
  • Made in the USA
Electronic parts are not returnable. Please check to make sure you have chosen the correct part.

Documentation: TacoEnhancedSwitchingRelay.pdf


Part No. Qty Unit Price
SR501-4 Single Zone Switching Relay
TacoSR501-4.pdf
$60.71
SR502-4 Two Zone Switching Relay w/Priority
TacoSR502-4.pdf
$133.78
SR503-4 Three Zone Switching Relay w/Priority
TacoSR503-4.pdf
$142.48
SR504-4 Four Zone Switching Relay w/Priority
TacoSR504-4.pdf
$171.65
SR506-4 Six Zone Switching Relay w/Priority
TacoSR506-4.pdf
$233.07
↓EXP Models w/ PowerPorts ↓
SR501-EXP-4 One Zone Switching Relay w/Priority
Taco501-EXP-4.pdf
$126.13
SR503-EXP-4 Three Zone Switching Relay w/Priority & 3 PowerPorts
TacoSR503-EXP-4.pdf
$143.94
SR504-EXP-4 Four Zone Switching Relay w/Priority & 3 PowerPorts
TacoSR504-EXP-4.pdf
$184.72
SR506-EXP-4 Six Zone Switching Relay w/Priority & 3 PowerPorts
TacoSR506-EXP-4.pdf
$247.86
↓Specialty Switching Relays ↓
SR501-HC-4 1 Zone Switching Relay, High Current $88.48
SR501-OR-4 FuelMizer, 1 Zone Switching Relay w/Outdoor Reset
TacoSR501-OR-4.pdf
$174.67

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