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Taco Switching Relays

Taco Switching Relays are your best choice for zoning with circulators. Packed with features such as external indicator lights, universal thermostat compatibility and standard "ice-cube" replaceable relays. Use regular models for basic priority switching and EXP models for advanced.
For best performance, use Taco Switching Relays with "00" series Taco circulator pumps.

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Product Description SKU Qty Unit Price
Taco 1 Zone Switching Relay

Taco
SR501-4

 
x1
$49.00 / each
Taco 2 Zone Switching Relay w/ Priority

Taco
SR502-4
x1
$110.95 / each
Taco 3 Zone Switching Relay w/ Priority

Taco
SR503-4

 
x1
$119.95 / each
Taco 4 Zone Switching Relay w/ Priority

Taco
SR504-4
x1
$168.95 / each
Taco 6 Zone Switching Relay w/ Priority

Taco
SR506-4

 
x1
$194.95 / each
Taco 1 Zone Switching Relay, Expandable

Taco
SR501-EXP-4
x1
$100.95 / each
Taco 3 Zone Switching Relay w/ Priority, Expandable

Taco
SR503-EXP-4
x1
$150.95 / each
Taco 4 Zone Switching Relay w/ Priority, Expandable

Taco
SR504-EXP-4
x1
$182.95 / each
Taco 6 Zone Switching Relay w/ Priority, Expandable

Taco
SR506-EXP-4
x1
$210.95 / each
Taco Universal Replacement Relay

Taco
SR501-845RP
x1
$39.95 / each
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Taco SR501 Switching Relay:
Taco SR501 Switching Relay is a standard equipment for every installer. This single model can entirely replace every model of every brand, even without removing the metal enclosure.
All Taco switching relays feature a standard replaceable "ice-cube" style relay and are compatible with conventional digital or programmable thermostats.

Taco Switching Relay models SR502/503/504/506:
These models have the same features as the SR501 model and also allow for basic priority switching.

Taco Expandable Switching Relays:
Additional features of expandable switching relays include the ability to expand up to 20 zones and use the advanced control features of PowerPort cards.

External diagnostics:
Taco makes it easy to troubleshoot the system. Bright external LED lights display full functionality of the Taco switching relay. The green light indicates that the power is connected and should always be on. When thermostat(s) calls for heat, both the appropriate circulator pump and indicating light (red) is on.

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