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Switching Relays

  • 1 Zone Switching Relay Product Image
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    1 Zone Switching Relay SR501-4 1 Zone Switching Relay
    SKU: SR501-4
    Brand: Taco
    (118)
    $60.00 each
      Box Up  
    $240.00 box of 4
    $60.00 each
    336
    Thu, Dec 26
    1,419
    QtyArrives
    336 Thu, Dec 26
    1,083 Fri, Dec 27 – Mon, Dec 30
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  • 2 Zone Switching Relay Product Image
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    2 Zone Switching Relay SR502-4 2 Zone Switching Relay
    SKU: SR502-4
    Brand: Taco
    (18)
    $142.00 each
      Box Up  
    $426.00 box of 3
    $142.00 each
    176
    Thu, Dec 26
    1,760
    QtyArrives
    176 Thu, Dec 26
    1,584 Fri, Dec 27 – Mon, Dec 30
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  • 1 Zone Switching Relay, High Current Capacity Product Image
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    1 Zone Switching Relay, High Current Capacity SR501-HC-4 1 Zone Switching Relay, High Current Capacity
    SKU: SR501-HC-4
    Brand: Taco
    (118)
    $85.79 each
      Box Up & Save 3%  
    $249.09 box of 3
    $83.03 each
    13
    Thu, Dec 26
    13
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    13 Thu, Dec 26
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  • 3 Zone Switching Relay Product Image
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    3 Zone Switching Relay SR503-4 3 Zone Switching Relay
    SKU: SR503-4
    Brand: Taco
    (33)
    $150.00 each
      Box Up  
    $450.00 box of 3
    $150.00 each
    235
    Thu, Dec 26
    553
    QtyArrives
    235 Thu, Dec 26
    318 Fri, Dec 27 – Mon, Dec 30
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  • 4 Zone Switching Relay Product Image
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    4 Zone Switching Relay SR504-4 4 Zone Switching Relay
    SKU: SR504-4
    Brand: Taco
    (118)
    $182.00 each
      Box Up  
    $364.00 box of 2
    $182.00 each
    62
    Thu, Dec 26
    1,067
    QtyArrives
    62 Thu, Dec 26
    1,005 Fri, Dec 27 – Mon, Dec 30
    Questions? Call 1-888-757-4774
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  • 6 Zone Switching Relay Product Image
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    6 Zone Switching Relay SR506-4 6 Zone Switching Relay
    SKU: SR506-4
    Brand: Taco
    (118)
    $240.00 each
      Box Up  
    $480.00 box of 2
    $240.00 each
    49
    Thu, Dec 26
    235
    QtyArrives
    49 Thu, Dec 26
    186 Fri, Dec 27 – Mon, Dec 30
    Questions? Call 1-888-757-4774
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  • 1 Zone Switching Relay Product Image
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    1 Zone Switching Relay SR501-EXP-4 1 Zone Switching Relay
    SKU: SR501-EXP-4
    Brand: Taco
    (25)
    $114.99 each
      Box Up & Save 3%  
    $335.97 box of 3
    $111.99 each
    9
    Thu, Dec 26
    31
    QtyArrives
    9 Thu, Dec 26
    22 Fri, Dec 27 – Mon, Dec 30
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  • 3 Zone Switching Relay<br>w/ Priority Product Image
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    3 Zone Switching Relay w/ Priority SR503-EXP-4 3 Zone Switching Relay w/ Priority
    SKU: SR503-EXP-4
    Brand: Taco
    (25)
    $158.00 each
      Box Up  
    $316.00 box of 2
    $158.00 each
    45
    Thu, Dec 26
    96
    QtyArrives
    45 Thu, Dec 26
    51 Fri, Dec 27 – Mon, Dec 30
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  • 4 Zone Switching Relay<br>w/ Priority Product Image
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    4 Zone Switching Relay w/ Priority SR504-EXP-4 4 Zone Switching Relay w/ Priority
    SKU: SR504-EXP-4
    Brand: Taco
    (25)
    $190.00 each
      Box Up  
    $380.00 box of 2
    $190.00 each
    60
    Thu, Dec 26
    150
    QtyArrives
    60 Thu, Dec 26
    90 Fri, Dec 27 – Mon, Dec 30
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  • 6 Zone Switching Relay<br>w/ Priority Product Image
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    6 Zone Switching Relay w/ Priority SR506-EXP-4 6 Zone Switching Relay w/ Priority
    SKU: SR506-EXP-4
    Brand: Taco
    (12)
    $248.00 each
      Box Up  
    $496.00 box of 2
    $248.00 each
    53
    Thu, Dec 26
    170
    QtyArrives
    53 Thu, Dec 26
    117 Fri, Dec 27 – Mon, Dec 30
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  • 24v Replacement Relay Product Image
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    24v Replacement Relay SR024-001RP 24v Replacement Relay
    SKU: SR024-001RP
    Brand: Taco
    (6)
    $23.99 each
      Box Up & Save 4%  
    $137.94 box of 6
    $22.99 each
    53
    Thu, Dec 26
    124
    QtyArrives
    53 Thu, Dec 26
    71 Fri, Dec 27 – Mon, Dec 30
    Questions? Call 1-888-757-4774
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  • FuelMizer SR501-OR-4 Switching Relay with Outdoor Reset Product Image
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    FuelMizer SR501-OR-4 Switching Relay with Outdoor Reset SR501-OR-4 FuelMizer SR501-OR-4 Switching Relay with Outdoor Reset
    SKU: SR501-OR-4
    Brand: Taco
    (6)
    $145.99 each
      Box Up & Save 4%  
    $419.97 box of 3
    $139.99 each
    5
    Thu, Dec 26
    20
    QtyArrives
    5 Thu, Dec 26
    15 Fri, Dec 27 – Mon, Dec 30
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  • 120v Replacement Relay Product Image
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    120v Replacement Relay SR120-001RP 120v Replacement Relay
    SKU: SR120-001RP
    Brand: Taco
    (1)
    $22.99 each
      Box Up & Save 4%  
    $132.54 box of 6
    $22.09 each
    3
    Thu, Dec 26
    55
    QtyArrives
    3 Thu, Dec 26
    52 Fri, Dec 27 – Mon, Dec 30
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  • Taco Boiler Reset Control 2-Stage Product Image
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    Taco Boiler Reset Control 2-Stage PC702-1 Taco Boiler Reset Control 2-Stage
    SKU: PC702-1
    Brand: Taco
    (1)
    $285.99 each
    2
    Thu, Dec 26
    8
    QtyArrives
    2 Thu, Dec 26
    6 Fri, Dec 27 – Mon, Dec 30
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  • Taco Boiler Reset Control Product Image
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    Taco Boiler Reset Control PC700-2 Taco Boiler Reset Control
    SKU: PC700-2
    Brand: Taco
    (3)
    $227.99 each
    5
    Thu, Dec 26
    17
    QtyArrives
    5 Thu, Dec 26
    12 Fri, Dec 27 – Mon, Dec 30
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  • Taco PC705 Variable Speed Pump Control Product Image
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    Taco PC705 Variable Speed Pump Control PC705-2 Taco PC705 Variable Speed Pump Control
    SKU: PC705-2
    Brand: Taco
    (2)
    $322.99 each
    4
    Thu, Dec 26
    11
    QtyArrives
    4 Thu, Dec 26
    7 Fri, Dec 27 – Mon, Dec 30
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  • Replacement Fuse - <br>1 Amp (10 Pack) Product Image
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    Replacement Fuse - 1 Amp (10 Pack) SR1A-001RP Replacement Fuse - 1 Amp (10 Pack)
    SKU: SR1A-001RP
    Brand: Taco
    $15.99 each
      Box Up & Save 4%  
    $152.90 box of 10
    $15.29 each
    4
    Thu, Dec 26
    23
    QtyArrives
    4 Thu, Dec 26
    19 Fri, Dec 27 – Mon, Dec 30
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  • Replacement Fuse - <br>5 Amp (10 Pack) Product Image
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    Replacement Fuse - 5 Amp (10 Pack) SR5A-005RP Replacement Fuse - 5 Amp (10 Pack)
    SKU: SR5A-005RP
    Brand: Taco
    (2)
    $13.69 each
      Box Up & Save 4%  
    $130.90 box of 10
    $13.09 each
    44
    Thu, Dec 26
    131
    QtyArrives
    44 Thu, Dec 26
    87 Fri, Dec 27 – Mon, Dec 30
    Questions? Call 1-888-757-4774
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  • Replacement Fuse - <br>6 Amp (10 Pack) Product Image
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    Replacement Fuse - 6 Amp (10 Pack) SR6A-001RP Replacement Fuse - 6 Amp (10 Pack)
    SKU: SR6A-001RP
    Brand: Taco
    (4)
    $17.99 each
      Box Up & Save 4%  
    $171.90 box of 10
    $17.19 each
    22
    Thu, Dec 26
    49
    QtyArrives
    22 Thu, Dec 26
    27 Fri, Dec 27 – Mon, Dec 30
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  • 2 Zone 120V Switching Relay with DPST switching Product Image
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    2 Zone 120V Switching Relay with DPST switching RA832A1066 2 Zone 120V Switching Relay with DPST switching
    SKU: RA832A1066
    Brand: Honeywell
    (27)
    $75.89 each
      Box Up & Save 3%  
    $295.96 box of 4
    $73.99 each
    551
    Thu, Dec 26
    551
    QtyArrives
    551 Thu, Dec 26
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  • Universal Switching Relay w/ Internal Transformer Product Image
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    Universal Switching Relay w/ Internal Transformer R8845U1003 Universal Switching Relay w/ Internal Transformer
    SKU: R8845U1003
    Brand: Honeywell
    (17)
    $58.99 each
      Box Up & Save 2%  
    $115.44 box of 2
    $57.72 each
    374
    Thu, Dec 26
    374
    QtyArrives
    374 Thu, Dec 26
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  • Switching Relay w/ Internal Transformer DPST Line Voltage Relays Product Image
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    Switching Relay w/ Internal Transformer DPST Line Voltage Relays R845A1030 Switching Relay w/ Internal Transformer DPST Line Voltage Relays
    SKU: R845A1030
    Brand: Honeywell
    (9)
    $77.99 each
      Box Up & Save 4%  
    $224.97 box of 3
    $74.99 each
    240
    Thu, Dec 26
    240
    QtyArrives
    240 Thu, Dec 26
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  • 1 Zone 120V Switching Relay w/ Internal Transformer, 1 SPST Product Image
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    1 Zone 120V Switching Relay w/ Internal Transformer, 1 SPST RA89A1074 1 Zone 120V Switching Relay w/ Internal Transformer, 1 SPST
    SKU: RA89A1074
    Brand: Honeywell
    (12)
    $60.99 each
      Box Up & Save 2%  
    $119.36 box of 2
    $59.68 each
    211
    Thu, Dec 26
    211
    QtyArrives
    211 Thu, Dec 26
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  • 120V, 60 Hz Switching Relay with SPDT switching Product Image
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    120V, 60 Hz Switching Relay with SPDT switching RA889A1001 120V, 60 Hz Switching Relay with SPDT switching
    SKU: RA889A1001
    Brand: Honeywell
    (7)
    $54.89 each
      Box Up & Save 2%  
    $268.95 box of 5
    $53.79 each
    42
    Thu, Dec 26
    42
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    42 Thu, Dec 26
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Resources

Videos

Articles

  • 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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