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Switching Relays

  • 1 Zone Switching Relay Product Image
    1 Zone Switching Relay
    SKU: SR501-4
    Brand: Taco
    (115)
    $54.95 each
    $211.80 box of 4
    $52.95 each
    645
    Fri, Aug 30
    2,381
    QtyArrives
    645 Fri, Aug 30
    1,736 Wed, Sep 4 – Thu, Sep 5
    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
    515
    Fri, Aug 30
    1,662
    QtyArrives
    515 Fri, Aug 30
    1,147 Wed, Sep 4 – Thu, Sep 5
    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
    (115)
    $94.95 each
    $269.85 box of 3
    $89.95 each
    14
    Fri, Aug 30
    41
    QtyArrives
    14 Fri, Aug 30
    27 Wed, Sep 4 – Thu, Sep 5
    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
    308
    Fri, Aug 30
    1,348
    QtyArrives
    308 Fri, Aug 30
    1,040 Wed, Sep 4 – Thu, Sep 5
    Questions? Call 1-888-757-4774
  • 4 Zone Switching Relay Product Image
    4 Zone Switching Relay
    SKU: SR504-4
    Brand: Taco
    (115)
    $172.95 each
    $331.90 box of 2
    $165.95 each
    347
    Fri, Aug 30
    347
    QtyArrives
    347 Fri, Aug 30
    Questions? Call 1-888-757-4774
  • 6 Zone Switching Relay Product Image
    6 Zone Switching Relay
    SKU: SR506-4
    Brand: Taco
    (115)
    $218.95 each
    $419.90 box of 2
    $209.95 each
    180
    Fri, Aug 30
    315
    QtyArrives
    180 Fri, Aug 30
    135 Wed, Sep 4 – Thu, Sep 5
    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
    82
    Fri, Aug 30
    216
    QtyArrives
    82 Fri, Aug 30
    134 Wed, Sep 4 – Thu, Sep 5
    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
    12
    Fri, Aug 30
    14
    QtyArrives
    12 Fri, Aug 30
    2 Wed, Sep 4 – Thu, Sep 5
    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
    85
    Fri, Aug 30
    203
    QtyArrives
    85 Fri, Aug 30
    118 Wed, Sep 4 – Thu, Sep 5
    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
    156
    Fri, Aug 30
    223
    QtyArrives
    156 Fri, Aug 30
    67 Wed, Sep 4 – Thu, Sep 5
    Questions? Call 1-888-757-4774
  • FuelMizer SR501-OR-4 Switching Relay with Outdoor Reset Product Image
    $145.95 each
    $419.85 box of 3
    $139.95 each
    5
    Fri, Aug 30
    16
    QtyArrives
    5 Fri, Aug 30
    11 Wed, Sep 4 – Thu, Sep 5
    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
    65
    Fri, Aug 30
    84
    QtyArrives
    65 Fri, Aug 30
    19 Wed, Sep 4 – Thu, Sep 5
    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
    27
    Fri, Aug 30
    65
    QtyArrives
    27 Fri, Aug 30
    38 Wed, Sep 4 – Thu, Sep 5
    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
    13
    Fri, Aug 30
    33
    QtyArrives
    13 Fri, Aug 30
    20 Wed, Sep 4 – Thu, Sep 5
    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
    Fri, Aug 30
    10
    QtyArrives
    2 Fri, Aug 30
    8 Wed, Sep 4 – Thu, Sep 5
    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
    8
    Fri, Aug 30
    17
    QtyArrives
    8 Fri, Aug 30
    9 Wed, Sep 4 – Thu, Sep 5
    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
    12
    Fri, Aug 30
    34
    QtyArrives
    12 Fri, Aug 30
    22 Wed, Sep 4 – Thu, Sep 5
    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
    54
    Fri, Aug 30
    92
    QtyArrives
    54 Fri, Aug 30
    38 Wed, Sep 4 – Thu, Sep 5
    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
    68
    Fri, Aug 30
    114
    QtyArrives
    68 Fri, Aug 30
    46 Wed, Sep 4 – Thu, Sep 5
    Questions? Call 1-888-757-4774
  • Switching Relay w/ Internal Transformer DPST Line Voltage Relays Product Image
    $78.99 each
    $224.97 box of 3
    $74.99 each
    213
    Fri, Aug 30
    213
    QtyArrives
    213 Fri, Aug 30
    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)
    $76.99 each
    $295.96 box of 4
    $73.99 each
    373
    Fri, Aug 30
    373
    QtyArrives
    373 Fri, Aug 30
    Questions? Call 1-888-757-4774
  • 1 Zone 120V Switching Relay w/ Internal Transformer, 1 SPST Product Image
    $60.99 each
    $117.98 box of 2
    $58.99 each
    134
    Fri, Aug 30
    134
    QtyArrives
    134 Fri, Aug 30
    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)
    $58.99 each
    $113.98 box of 2
    $56.99 each
    246
    Fri, Aug 30
    246
    QtyArrives
    246 Fri, Aug 30
    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)
    $55.99 each
    $269.95 box of 5
    $53.99 each
    40
    Fri, Aug 30
    40
    QtyArrives
    40 Fri, Aug 30
    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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