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Aquastats & Wells

  • $96.99 each
    $278.97 box of 3
    $92.99 each
    490
    Thu, Jun 27
    490
    QtyArrives
    490 Thu, Jun 27
    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
    221
    Thu, Jun 27
    221
    QtyArrives
    221 Thu, Jun 27
    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
    256
    Thu, Jun 27
    256
    QtyArrives
    256 Thu, Jun 27
    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
    63
    Thu, Jun 27
    63
    QtyArrives
    63 Thu, Jun 27
    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
    375
    Thu, Jun 27
    375
    QtyArrives
    375 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $97.99 each
    $375.96 box of 4
    $93.99 each
    430
    Thu, Jun 27
    430
    QtyArrives
    430 Thu, Jun 27
    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
    223
    Thu, Jun 27
    223
    QtyArrives
    223 Thu, Jun 27
    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
    332
    Thu, Jun 27
    332
    QtyArrives
    332 Thu, Jun 27
    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
    381
    Thu, Jun 27
    381
    QtyArrives
    381 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $59.99 each
    245
    Thu, Jun 27
    245
    QtyArrives
    245 Thu, Jun 27
    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
    368
    Thu, Jun 27
    368
    QtyArrives
    368 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • High Limit, Manual Aquastat Controller 130°F to 270°F
    SKU: L4006E1000
    Brand: Honeywell
    (1)
    $107.99 each
    209
    Thu, Jun 27
    209
    QtyArrives
    209 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $149.99 each
    $428.97 box of 3
    $142.99 each
    271
    Thu, Jun 27
    271
    QtyArrives
    271 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $116.99 each
    $447.96 box of 4
    $111.99 each
    83
    Thu, Jun 27
    83
    QtyArrives
    83 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $218.99 each
    $626.97 box of 3
    $208.99 each
    135
    Thu, Jun 27
    135
    QtyArrives
    135 Thu, Jun 27
    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
    229
    Thu, Jun 27
    229
    QtyArrives
    229 Thu, Jun 27
    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
    Thu, Jun 27
    86
    QtyArrives
    86 Thu, Jun 27
    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
    123
    Thu, Jun 27
    123
    QtyArrives
    123 Thu, Jun 27
    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
    150
    Thu, Jun 27
    150
    QtyArrives
    150 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $109.99 each
    $419.96 box of 4
    $104.99 each
    195
    Thu, Jun 27
    195
    QtyArrives
    195 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $144.99 each
    $413.97 box of 3
    $137.99 each
    114
    Thu, Jun 27
    114
    QtyArrives
    114 Thu, Jun 27
    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
    200
    Thu, Jun 27
    200
    QtyArrives
    200 Thu, Jun 27
    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
    Thu, Jun 27
    40
    QtyArrives
    40 Thu, Jun 27
    Questions? Call 1-888-757-4774
  • $31.95 each
    $183.90 box of 6
    $30.65 each
    41
    Thu, Jun 27
    95
    QtyArrives
    41 Thu, Jun 27
    54 Mon, Jul 1 – Tue, Jul 2
    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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