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Aquastats & Wells

  • $96.99 each
    $278.97 box of 3
    $92.99 each
    481
    Fri, Jun 28
    481
    QtyArrives
    481 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High Limit Vertical Mount Aquastat Relay 15°F Differential
    SKU: L8148E1265
    Brand: Honeywell
    (77)
    $215.99 each
    $617.97 box of 3
    $205.99 each
    368
    Fri, Jun 28
    368
    QtyArrives
    368 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High Limit Horiz. Mount Aquastat Relay 8°F Differential
    SKU: L8148A1017
    Brand: Honeywell
    (69)
    $169.99 each
    $647.96 box of 4
    $161.99 each
    315
    Fri, Jun 28
    315
    QtyArrives
    315 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • 140-240F AquaStat Relay w/ Vent Damper Connection
    SKU: L8148E1257
    Brand: Honeywell
    (32)
    $227.99 each
    $653.97 box of 3
    $217.99 each
    62
    Fri, Jun 28
    62
    QtyArrives
    62 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • 120 Vac Oil Electronic Aquastat
    SKU: L7224U1002
    Brand: Honeywell
    (35)
    $145.99 each
    $419.97 box of 3
    $139.99 each
    422
    Fri, Jun 28
    422
    QtyArrives
    422 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $97.99 each
    $375.96 box of 4
    $93.99 each
    417
    Fri, Jun 28
    417
    QtyArrives
    417 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • Aquastat Relay 8°F Differential
    SKU: L8148J1009
    Brand: Honeywell
    (45)
    $195.99 each
    $747.96 box of 4
    $186.99 each
    273
    Fri, Jun 28
    273
    QtyArrives
    273 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • 3/4" Aquastat Well
    SKU: 121371B
    Brand: Honeywell
    (10)
    $29.19 each
    $111.56 box of 4
    $27.89 each
    327
    Fri, Jun 28
    327
    QtyArrives
    327 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • 1/2" Aquastat Well
    SKU: 121371A
    Brand: Honeywell
    (10)
    $27.89 each
    $106.36 box of 4
    $26.59 each
    367
    Fri, Jun 28
    367
    QtyArrives
    367 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $59.99 each
    244
    Fri, Jun 28
    244
    QtyArrives
    244 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High/Low Limit Circulator Horiz. Mount Aquastat 100-240°F
    SKU: L6006A1145
    Brand: Honeywell
    (14)
    $103.99 each
    $395.96 box of 4
    $98.99 each
    362
    Fri, Jun 28
    362
    QtyArrives
    362 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High Limit, Manual Aquastat Controller 130°F to 270°F
    SKU: L4006E1000
    Brand: Honeywell
    (1)
    $107.99 each
    207
    Fri, Jun 28
    207
    QtyArrives
    207 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $149.99 each
    $428.97 box of 3
    $142.99 each
    271
    Fri, Jun 28
    271
    QtyArrives
    271 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $116.99 each
    $447.96 box of 4
    $111.99 each
    83
    Fri, Jun 28
    83
    QtyArrives
    83 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $218.99 each
    $626.97 box of 3
    $208.99 each
    155
    Fri, Jun 28
    155
    QtyArrives
    155 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High/Low Limit Aquastat 40°F to 180°F Range
    SKU: L4006A1959
    Brand: Honeywell
    (9)
    $108.99 each
    $415.96 box of 4
    $103.99 each
    227
    Fri, Jun 28
    227
    QtyArrives
    227 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • 3/4" Aquastat Well
    SKU: 121371B-OMI
    Brand: OMI
    $11.65 each
    $273.75 box of 25
    $10.95 each
    86
    Fri, Jun 28
    86
    QtyArrives
    86 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • 1/2" Aquastat Well
    SKU: 121371A-OMI
    Brand: OMI
    (2)
    $9.45 each
    $223.75 box of 25
    $8.95 each
    121
    Fri, Jun 28
    121
    QtyArrives
    121 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High Limit Aquastat 130°F to 270°F Range Manual Reset
    SKU: L4006E1067
    Brand: Honeywell
    (4)
    $149.99 each
    $575.96 box of 4
    $143.99 each
    149
    Fri, Jun 28
    149
    QtyArrives
    149 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $109.99 each
    $419.96 box of 4
    $104.99 each
    195
    Fri, Jun 28
    195
    QtyArrives
    195 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $144.99 each
    $413.97 box of 3
    $137.99 each
    113
    Fri, Jun 28
    113
    QtyArrives
    113 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High Limit Horiz. Mount Triple Aquastat Relay
    SKU: L8124C1003
    Brand: Honeywell
    (15)
    $224.99 each
    $644.97 box of 3
    $214.99 each
    40
    Fri, Jun 28
    40
    QtyArrives
    40 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • High Limit Vertical Mount Aquastat Relay 15°F Differential
    SKU: L8148E1299
    Brand: Honeywell
    (13)
    $221.99 each
    $635.97 box of 3
    $211.99 each
    230
    Fri, Jun 28
    230
    QtyArrives
    230 Fri, Jun 28
    Questions? Call 1-888-757-4774
  • $31.95 each
    $183.90 box of 6
    $30.65 each
    40
    Fri, Jun 28
    94
    QtyArrives
    40 Fri, Jun 28
    54 Tue, Jul 2 – Wed, Jul 3
    Questions? Call 1-888-757-4774

Resources

Videos

Articles

  • An aquastat is a device used to control water temperature in hydronic heating systems. It has both high and low limit temperature controls to prevent boilers from firing too frequently. Aquastats are a type of thermostat that senses the temperature of the water and activates or deactivates the burner by controlling the electrical circuit. The temperature of the water is maintained by the aquastat within its preset limits. When the thermostat demands heat, the heating mechanism activates and heat will be sent until the maximum temperature limit is reached. At that point, the mechanism will turn off. If the boiler's water temperature drops below the max temperature limit, the boiler will re-fire. The boiler will also re-fire when the boiler water temperature goes below a range around the low limit. This low limit is intended for tankless domestic hot water, ensuring that boiler water remains warm enough to heat domestic hot water.

    Aquastat wells are used in conjunction with aquastats. Immersion wells are used with Aquastat Temperature Controllers to hold the temperature sensing bulb in the controlled medium. They also prevent leakage of the controlled medium. Honeywell aquastat wells are popular and are available in 1/2" and 3/4" sizes.

    Our website offers a wide selection of Honeywell, White Rodgers, and Taco aquastats and wells for regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required.
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