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Switching Relays

  • 1 Zone Switching Relay Product Image
    1 Zone Switching Relay
    SKU: SR501-4
    Brand: Taco
    (114)
    $54.95 each
    $211.80 box of 4
    $52.95 each
    4
    Wed, May 1
    892
    QtyArrives
    4 Wed, May 1
    888 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 1 Zone Switching Relay, High Current Capacity Product Image
    1 Zone Switching Relay, High Current Capacity
    SKU: SR501-HC-4
    Brand: Taco
    (114)
    $94.95 each
    $269.85 box of 3
    $89.95 each
    4
    Fri, May 3 – Mon, May 6
    4
    QtyArrives
    4 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 2 Zone Switching Relay Product Image
    2 Zone Switching Relay
    SKU: SR502-4
    Brand: Taco
    (18)
    $124.95 each
    $359.85 box of 3
    $119.95 each
    1,034
    Fri, May 3 – Mon, May 6
    1,034
    QtyArrives
    1,034 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 3 Zone Switching Relay Product Image
    3 Zone Switching Relay
    SKU: SR503-4
    Brand: Taco
    (32)
    $132.95 each
    $383.85 box of 3
    $127.95 each
    39
    Wed, May 1
    323
    QtyArrives
    39 Wed, May 1
    284 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 4 Zone Switching Relay Product Image
    4 Zone Switching Relay
    SKU: SR504-4
    Brand: Taco
    (114)
    $172.95 each
    $331.90 box of 2
    $165.95 each
    25
    Wed, May 1
    270
    QtyArrives
    25 Wed, May 1
    245 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 6 Zone Switching Relay Product Image
    6 Zone Switching Relay
    SKU: SR506-4
    Brand: Taco
    (114)
    $218.95 each
    $419.90 box of 2
    $209.95 each
    25
    Wed, May 1
    355
    QtyArrives
    25 Wed, May 1
    330 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 3 Zone Switching Relay<br>w/ Priority Product Image
    3 Zone Switching Relay w/ Priority
    SKU: SR503-EXP-4
    Brand: Taco
    (25)
    $154.95 each
    $297.90 box of 2
    $148.95 each
    4
    Wed, May 1
    202
    QtyArrives
    4 Wed, May 1
    198 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 1 Zone Switching Relay Product Image
    1 Zone Switching Relay
    SKU: SR501-EXP-4
    Brand: Taco
    (25)
    $117.95 each
    $338.85 box of 3
    $112.95 each
    16
    Fri, May 3 – Mon, May 6
    16
    QtyArrives
    16 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 4 Zone Switching Relay<br>w/ Priority Product Image
    4 Zone Switching Relay w/ Priority
    SKU: SR504-EXP-4
    Brand: Taco
    (25)
    $189.95 each
    $363.90 box of 2
    $181.95 each
    11
    Wed, May 1
    11
    QtyArrives
    11 Wed, May 1
    Questions? Call 1-888-757-4774
  • 6 Zone Switching Relay<br>w/ Priority Product Image
    6 Zone Switching Relay w/ Priority
    SKU: SR506-EXP-4
    Brand: Taco
    (9)
    $225.95 each
    $433.90 box of 2
    $216.95 each
    12
    Wed, May 1
    23
    QtyArrives
    12 Wed, May 1
    11 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • FuelMizer SR501-OR-4 Switching Relay with Outdoor Reset Product Image
    FuelMizer SR501-OR-4 Switching Relay with Outdoor Reset
    SKU: SR501-OR-4
    Brand: Taco
    (6)
    $145.95 each
    $419.85 box of 3
    $139.95 each
    22
    Fri, May 3 – Mon, May 6
    22
    QtyArrives
    22 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 24v Replacement Relay Product Image
    24v Replacement Relay
    SKU: SR024-001RP
    Brand: Taco
    (6)
    $27.25 each
    $156.90 box of 6
    $26.15 each
    3
    Wed, May 1
    81
    QtyArrives
    3 Wed, May 1
    78 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 120v Replacement Relay Product Image
    120v Replacement Relay
    SKU: SR120-001RP
    Brand: Taco
    (1)
    $27.25 each
    $156.90 box of 6
    $26.15 each
    3
    Wed, May 1
    61
    QtyArrives
    3 Wed, May 1
    58 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • Taco Boiler Reset Control Product Image
    Taco Boiler Reset Control
    SKU: PC700-2
    Brand: Taco
    (3)
    $242.95 each
    15
    Fri, May 3 – Mon, May 6
    15
    QtyArrives
    15 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • Taco Boiler Reset Control 2-Stage Product Image
    Taco Boiler Reset Control 2-Stage
    SKU: PC702-1
    Brand: Taco
    (1)
    $298.95 each
    2
    Wed, May 1
    10
    QtyArrives
    2 Wed, May 1
    8 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • Taco PC705 Variable Speed Pump Control Product Image
    Taco PC705 Variable Speed Pump Control
    SKU: PC705-2
    Brand: Taco
    (2)
    $322.95 each
    9
    Fri, May 3 – Mon, May 6
    9
    QtyArrives
    9 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • Replacement Fuse - <br>1 Amp (10 Pack) Product Image
    Replacement Fuse - 1 Amp (10 Pack)
    SKU: SR1A-001RP
    Brand: Taco
    $15.95 each
    $152.50 box of 10
    $15.25 each
    24
    Fri, May 3 – Mon, May 6
    24
    QtyArrives
    24 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • Replacement Fuse - <br>5 Amp (10 Pack) Product Image
    Replacement Fuse - 5 Amp (10 Pack)
    SKU: SR5A-005RP
    Brand: Taco
    (2)
    $17.95 each
    $171.50 box of 10
    $17.15 each
    1
    Wed, May 1
    87
    QtyArrives
    1 Wed, May 1
    86 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • Replacement Fuse - <br>6 Amp (10 Pack) Product Image
    Replacement Fuse - 6 Amp (10 Pack)
    SKU: SR6A-001RP
    Brand: Taco
    (4)
    $17.95 each
    $171.50 box of 10
    $17.15 each
    14
    Wed, May 1
    56
    QtyArrives
    14 Wed, May 1
    42 Fri, May 3 – Mon, May 6
    Questions? Call 1-888-757-4774
  • 1 Zone 120V Switching Relay w/ Internal Transformer, 1 SPST Product Image
    1 Zone 120V Switching Relay w/ Internal Transformer, 1 SPST
    SKU: RA89A1074
    Brand: Honeywell
    (11)
    $63.95 each
    $123.90 box of 2
    $61.95 each
    102
    Wed, May 1
    102
    QtyArrives
    102 Wed, May 1
    Questions? Call 1-888-757-4774
  • Universal Switching Relay w/ Internal Transformer Product Image
    Universal Switching Relay w/ Internal Transformer
    SKU: R8845U1003
    Brand: Honeywell
    (17)
    $61.95 each
    $119.90 box of 2
    $59.95 each
    155
    Wed, May 1
    155
    QtyArrives
    155 Wed, May 1
    Questions? Call 1-888-757-4774
  • 2 Zone 120V Switching Relay with DPST switching Product Image
    2 Zone 120V Switching Relay with DPST switching
    SKU: RA832A1066
    Brand: Honeywell
    (26)
    $75.95 each
    $291.80 box of 4
    $72.95 each
    296
    Wed, May 1
    296
    QtyArrives
    296 Wed, May 1
    Questions? Call 1-888-757-4774
  • Switching Relay w/ Internal Transformer DPST Line Voltage Relays Product Image
    Switching Relay w/ Internal Transformer DPST Line Voltage Relays
    SKU: R845A1030
    Brand: Honeywell
    (9)
    $79.95 each
    $230.85 box of 3
    $76.95 each
    137
    Wed, May 1
    137
    QtyArrives
    137 Wed, May 1
    Questions? Call 1-888-757-4774
  • 120V, 60 Hz Switching Relay with SPDT switching Product Image
    120V, 60 Hz Switching Relay with SPDT switching
    SKU: RA889A1001
    Brand: Honeywell
    (6)
    $55.95 each
    $269.75 box of 5
    $53.95 each
    32
    Wed, May 1
    32
    QtyArrives
    32 Wed, May 1
    Questions? Call 1-888-757-4774

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, Bell & Gossett, and Erie switching relays for residential and light commercial applications.
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