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Switching Relays

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More About Switching Relays

Switching relays are used to control the flow of water in a heating system by monitoring temperatures and adjusting boiler water temperature to match the demand. They are used in coordination with circulator pumps and programmable thermostats to control zoning in a hydronic heating system. This makes them ideal for indirect water heaters and priority zoning applications. They maximize efficiency and reduce fuel usage, which saves money. In addition, they provide intermediate switching of a line voltage device from a low voltage controller. Switching relays are available in one to six zone models, and if additional zones are required expandable models provide the ability to expand up to 20 zones.

We offer a wide selection of Taco, Honeywell , Argo, and Bell & Gossett switching relays for residential and light commercial applications.
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1 Zone Switching Relay
1 Zone Switching Relay
SKU: SR501-4
Taco
SKU: SR501-4
Brand: Taco
(149)
$68.02 each
Get 200 by Thu, Feb 29
More Available
Get 200 by Thu, Feb 29
More Available
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4 Zone Switching Relay
4 Zone Switching Relay
SKU: SR504-4
Taco
SKU: SR504-4
Brand: Taco
(149)
$224.52 each
Get 218 by Thu, Feb 29
More Available
Get 218 by Thu, Feb 29
More Available
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2 Zone Switching Relay
2 Zone Switching Relay
SKU: SR502-4
Taco
SKU: SR502-4
Brand: Taco
(29)
$171.51 each
Get 159 by Thu, Feb 29
More Available
Get 159 by Thu, Feb 29
More Available
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3 Zone Switching Relay w/ Priority
3 Zone Switching Relay w/ Priority
SKU: SR503-EXP-4
Taco
SKU: SR503-EXP-4
Brand: Taco
(40)
$189.59 each
Get 106 by Thu, Feb 29
Get 106 by Thu, Feb 29
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6 Zone Switching Relay
6 Zone Switching Relay
SKU: SR506-4
Taco
SKU: SR506-4
Brand: Taco
(149)
$278.77 each
Get 95 by Thu, Feb 29
More Available
Get 95 by Thu, Feb 29
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2 Zone 120V Switching Relay w/ DPST Switching
2 Zone 120V Switching Relay w/ DPST Switching
SKU: RA832A1066
Resideo
SKU: RA832A1066
Brand: Resideo
(46)
$109.27 each
Get 218 by Thu, Feb 29
More Available
Get 218 by Thu, Feb 29
More Available
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3 Zone Switching Relay
3 Zone Switching Relay
SKU: SR503-4
Taco
SKU: SR503-4
Brand: Taco
(48)
$182.60 each
Get 210 by Thu, Feb 29
More Available
Get 210 by Thu, Feb 29
More Available
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6 Zone Switching Relay w/ Priority
6 Zone Switching Relay w/ Priority
SKU: SR506-EXP-4
Taco
SKU: SR506-EXP-4
Brand: Taco
(20)
$292.47 each
Get 104 by Thu, Feb 29
More Available
Get 104 by Thu, Feb 29
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Replacement Fuse - 6 Amp (10 Pack)
Replacement Fuse - 6 Amp (10 Pack)
SKU: SR6A-001RP
Taco
SKU: SR6A-001RP
Brand: Taco
(10)
$24.54 each
Get it by Wed, Mar 27 - Wed, Apr 24
Get it by Wed, Mar 27 - Wed, Apr 24
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1 Zone 120V Switching Relay w/ Internal Transformer, 1 SPST Line Relay
$90.18 each
Get 101 by Thu, Feb 29
More Available
Get 101 by Thu, Feb 29
More Available
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4 Zone Switching Relay w/ Priority
4 Zone Switching Relay w/ Priority
SKU: SR504-EXP-4
Taco
SKU: SR504-EXP-4
Brand: Taco
(40)
$237.95 each
Get 131 by Thu, Feb 29
More Available
Get 131 by Thu, Feb 29
More Available
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2 Zone Pump Controller Switching Relay with Priority Protection
$103.95 each
Get 30 by Thu, Feb 29
More Available
Get 30 by Thu, Feb 29
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Replacement Fuse - 5 Amp (10 Pack)
Replacement Fuse - 5 Amp (10 Pack)
SKU: SR5A-005RP
Taco
SKU: SR5A-005RP
Brand: Taco
(5)
$16.03 each
Get it by Wed, Mar 27 - Wed, Apr 24
Get it by Wed, Mar 27 - Wed, Apr 24
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Switching Relay w/ Internal Transformer DPST Line Voltage Relays
$107.73 each
Get 84 by Thu, Feb 29
More Available
Get 84 by Thu, Feb 29
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1 Zone Switching Relay
1 Zone Switching Relay
SKU: AR822II
Argo
SKU: AR822II
Brand: Argo
(8)
$93.79 each
Get 226 by Thu, Feb 29
More Available
Get 226 by Thu, Feb 29
More Available
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1 Zone Pump Controller Switching Relay with Surge & Fuse Protection (DPDT)
$53.75 each
Get 33 by Thu, Feb 29
More Available
Get 33 by Thu, Feb 29
More Available
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3 Zone Pump Controller Switching Relay with Priority Protection
$125.95 each
Get 30 by Thu, Feb 29
More Available
Get 30 by Thu, Feb 29
More Available
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ARM-6P 6 Zone Expandable Switching Relay
ARM-6P 6 Zone Expandable Switching Relay
SKU: ARM6P
Argo
SKU: ARM6P
Brand: Argo
(49)
$399.25 each