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Switching Relays

  • 1 Zone Switching Relay
    SKU: SR501-4
    Brand: Taco
    (115)
    $54.95 each
    $211.80 box of 4
    $52.95 each
    52
    Tue, Jul 9
    305
    QtyArrives
    52 Tue, Jul 9
    253 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • 2 Zone Switching Relay
    SKU: SR502-4
    Brand: Taco
    (18)
    $124.95 each
    $359.85 box of 3
    $119.95 each
    53
    Tue, Jul 9
    431
    QtyArrives
    53 Tue, Jul 9
    378 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • 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
    5
    Wed, Jul 10
    32
    QtyArrives
    5 Wed, Jul 10
    27 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • 3 Zone Switching Relay
    SKU: SR503-4
    Brand: Taco
    (32)
    $132.95 each
    $383.85 box of 3
    $127.95 each
    28
    Tue, Jul 9
    345
    QtyArrives
    28 Tue, Jul 9
    317 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • 4 Zone Switching Relay
    SKU: SR504-4
    Brand: Taco
    (115)
    $172.95 each
    $331.90 box of 2
    $165.95 each
    17
    Tue, Jul 9
    253
    QtyArrives
    17 Tue, Jul 9
    236 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • 6 Zone Switching Relay
    SKU: SR506-4
    Brand: Taco
    (115)
    $218.95 each
    $419.90 box of 2
    $209.95 each
    12
    Tue, Jul 9
    148
    QtyArrives
    12 Tue, Jul 9
    136 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • 1 Zone Switching Relay
    SKU: SR501-EXP-4
    Brand: Taco
    (25)
    $117.95 each
    $338.85 box of 3
    $112.95 each
    4
    Tue, Jul 9
    12
    QtyArrives
    4 Tue, Jul 9
    6 Wed, Jul 10
    2 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • 3 Zone Switching Relay w/ Priority
    SKU: SR503-EXP-4
    Brand: Taco
    (25)
    $154.95 each
    $297.90 box of 2
    $148.95 each
    8
    Tue, Jul 9
    206
    QtyArrives
    8 Tue, Jul 9
    71 Wed, Jul 10
    127 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • 4 Zone Switching Relay w/ Priority
    SKU: SR504-EXP-4
    Brand: Taco
    (25)
    $189.95 each
    $363.90 box of 2
    $181.95 each
    86
    Wed, Jul 10
    124
    QtyArrives
    86 Wed, Jul 10
    38 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • 6 Zone Switching Relay w/ Priority
    SKU: SR506-EXP-4
    Brand: Taco
    (9)
    $225.95 each
    $433.90 box of 2
    $216.95 each
    1
    Tue, Jul 9
    88
    QtyArrives
    1 Tue, Jul 9
    87 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • $145.95 each
    $419.85 box of 3
    $139.95 each
    8
    Wed, Jul 10
    19
    QtyArrives
    8 Wed, Jul 10
    11 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • 24v Replacement Relay
    SKU: SR024-001RP
    Brand: Taco
    (6)
    $27.25 each
    $156.90 box of 6
    $26.15 each
    8
    Tue, Jul 9
    84
    QtyArrives
    8 Tue, Jul 9
    57 Wed, Jul 10
    19 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • 120v Replacement Relay
    SKU: SR120-001RP
    Brand: Taco
    (1)
    $27.25 each
    $156.90 box of 6
    $26.15 each
    16
    Wed, Jul 10
    48
    QtyArrives
    16 Wed, Jul 10
    32 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • Taco Boiler Reset Control
    SKU: PC700-2
    Brand: Taco
    (3)
    $242.95 each
    14
    Wed, Jul 10
    35
    QtyArrives
    14 Wed, Jul 10
    21 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • Taco Boiler Reset Control 2-Stage
    SKU: PC702-1
    Brand: Taco
    (1)
    $298.95 each
    4
    Wed, Jul 10
    12
    QtyArrives
    4 Wed, Jul 10
    8 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • Taco PC705 Variable Speed Pump Control
    SKU: PC705-2
    Brand: Taco
    (2)
    $322.95 each
    4
    Tue, Jul 9
    19
    QtyArrives
    4 Tue, Jul 9
    6 Wed, Jul 10
    9 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • Replacement Fuse - 1 Amp (10 Pack)
    SKU: SR1A-001RP
    Brand: Taco
    $15.95 each
    $152.50 box of 10
    $15.25 each
    2
    Wed, Jul 10
    24
    QtyArrives
    2 Wed, Jul 10
    22 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • Replacement Fuse - 5 Amp (10 Pack)
    SKU: SR5A-005RP
    Brand: Taco
    (2)
    $17.95 each
    $171.50 box of 10
    $17.15 each
    6
    Tue, Jul 9
    94
    QtyArrives
    6 Tue, Jul 9
    50 Wed, Jul 10
    38 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • Replacement Fuse - 6 Amp (10 Pack)
    SKU: SR6A-001RP
    Brand: Taco
    (4)
    $17.95 each
    $171.50 box of 10
    $17.15 each
    2
    Tue, Jul 9
    90
    QtyArrives
    2 Tue, Jul 9
    54 Wed, Jul 10
    34 Thu, Jul 11 – Fri, Jul 12
    Questions? Call 1-888-757-4774
  • $78.99 each
    $224.97 box of 3
    $74.99 each
    6
    Tue, Jul 9
    219
    QtyArrives
    6 Tue, Jul 9
    213 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • Universal Switching Relay w/ Internal Transformer
    SKU: R8845U1003
    Brand: Honeywell
    (17)
    $60.99 each
    $115.98 box of 2
    $57.99 each
    20
    Tue, Jul 9
    209
    QtyArrives
    20 Tue, Jul 9
    189 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • 2 Zone 120V Switching Relay with DPST switching
    SKU: RA832A1066
    Brand: Honeywell
    (26)
    $76.99 each
    $295.96 box of 4
    $73.99 each
    1
    Tue, Jul 9
    331
    QtyArrives
    1 Tue, Jul 9
    330 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • $62.99 each
    $119.98 box of 2
    $59.99 each
    10
    Tue, Jul 9
    110
    QtyArrives
    10 Tue, Jul 9
    100 Wed, Jul 10
    Questions? Call 1-888-757-4774
  • 120V, 60 Hz Switching Relay with SPDT switching
    SKU: RA889A1001
    Brand: Honeywell
    (6)
    $57.99 each
    $274.95 box of 5
    $54.99 each
    1
    Tue, Jul 9
    36
    QtyArrives
    1 Tue, Jul 9
    35 Wed, Jul 10
    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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