Taco SR503-EXP-4 Taco SR503-EXP-4 Three Zone Switching Relay W/ Priority

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Taco SR503-EXP-4 Three Zone Switching Relay W/ Priority

SKU: 684507
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Save 22% · Retail: $223.68

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About the Taco SR503-EXP-4

The Taco SR503-EXP-4 is a three-zone switching relay with a priority. It features a compact design with external indicator lights that provide an instant diagnostic about installation start-ups. Designed for a hassle-free installation with its simplified wiring, this switching relay is ideal for a retrofit or use in new installations. It also comes with a switching capability for added convenience, ideal for any household or light commercial application. The fuse is protected and includes a spare for extra peace of mind. This UL-and CSA-approved relay is made in the USA so you can be confident of a high-quality product with a trouble-free performance in the years to come. It is backed by a 3-year extended warranty.

Product Details

Electrical Voltage: 24 Volt
Product: Relay
Manufacturer: Taco
Mpn # SR503-EXP-4
Weight 2.65 lbs.

Product Features

  • Part Number: NA
  • Zones - 3 with Priority (Priority capability for domestic hot water)
  • Add-on Power Control Plug - 1
  • Add-on PowerPort Card Slots - 3
  • Allows Circulator and Boiler to be switched on at the same time - Yes
  • Double Pole - Single Throw (DPST)


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