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Aquastats & Wells

  • High Limit Vertical Mount Aquastat Relay<br>15°F Differential Product Image
    $209.99 each
    $599.97 box of 3
    $199.99 each
    722
    Tue, Sep 3
    722
    QtyArrives
    722 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High or Low Limit & Circulator Strap-On Aquastat, 65°F to 200°F Product Image
    $96.99 each
    $278.97 box of 3
    $92.99 each
    770
    Tue, Sep 3
    770
    QtyArrives
    770 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit Horiz. Mount Aquastat Relay<br>8°F Differential Product Image
    $159.99 each
    $615.96 box of 4
    $153.99 each
    462
    Tue, Sep 3
    462
    QtyArrives
    462 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • 140-240F AquaStat Relay w/ Vent Damper Connection Product Image
    140-240F AquaStat Relay w/ Vent Damper Connection
    SKU: L8148E1257
    Brand: Honeywell
    (32)
    $219.99 each
    $629.97 box of 3
    $209.99 each
    293
    Tue, Sep 3
    293
    QtyArrives
    293 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • 120 Vac Oil<br>Electronic Aquastat Product Image
    120 Vac Oil Electronic Aquastat
    SKU: L7224U1002
    Brand: Honeywell
    (35)
    $145.99 each
    $419.97 box of 3
    $139.99 each
    645
    Tue, Sep 3
    645
    QtyArrives
    645 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High or Low Limit Aquastat 100-240°F Range<br>5-30°F Adj Differential Product Image
    $94.99 each
    $363.96 box of 4
    $90.99 each
    522
    Tue, Sep 3
    522
    QtyArrives
    522 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • Aquastat Relay<br>8°F Differential Product Image
    Aquastat Relay 8°F Differential
    SKU: L8148J1009
    Brand: Honeywell
    (45)
    $186.99 each
    $719.96 box of 4
    $179.99 each
    418
    Tue, Sep 3
    418
    QtyArrives
    418 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • 3/4" Aquastat Well Product Image
    3/4" Aquastat Well
    SKU: 121371B
    Brand: Honeywell
    (10)
    $29.19 each
    $111.56 box of 4
    $27.89 each
    349
    Tue, Sep 3
    349
    QtyArrives
    349 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit Immersion Aquastat, 100-200&deg;F Range, 8&deg;F Differential Product Image
    $59.99 each
    300
    Tue, Sep 3
    300
    QtyArrives
    300 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • 1/2" Aquastat Well Product Image
    1/2" Aquastat Well
    SKU: 121371A
    Brand: Honeywell
    (10)
    $26.99 each
    $103.56 box of 4
    $25.89 each
    446
    Tue, Sep 3
    446
    QtyArrives
    446 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High/Low Limit Circulator Horiz. Mount Aquastat<br>100-240°F Product Image
    $103.99 each
    $395.96 box of 4
    $98.99 each
    538
    Tue, Sep 3
    538
    QtyArrives
    538 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit Strap-On Aquastat, Manual Reset 100°F to 240°F Product Image
    $149.99 each
    $428.97 box of 3
    $142.99 each
    278
    Tue, Sep 3
    278
    QtyArrives
    278 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High or Low Limit Remote Bulb Aquastat, 100-240°F<br>5-30°F Adj. Differential Product Image
    $116.99 each
    $447.96 box of 4
    $111.99 each
    144
    Tue, Sep 3
    144
    QtyArrives
    144 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit, Manual Aquastat Controller<br>130°F to 270°F Product Image
    $104.99 each
    320
    Tue, Sep 3
    320
    QtyArrives
    320 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit Protection<br>Low Limit & Circulator Triple Aquastat Relay Product Image
    $218.99 each
    $626.97 box of 3
    $208.99 each
    183
    Tue, Sep 3
    183
    QtyArrives
    183 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High/Low Limit Aquastat<br>40&#176;F to 180&#176;F Range Product Image
    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
    264
    Tue, Sep 3
    264
    QtyArrives
    264 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • 3/4" Aquastat Well Product Image
    3/4" Aquastat Well
    SKU: 121371B-OMI
    Brand: OMI
    $11.65 each
    $273.75 box of 25
    $10.95 each
    67
    Tue, Sep 3
    67
    QtyArrives
    67 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • 1/2" Aquastat Well Product Image
    1/2" Aquastat Well
    SKU: 121371A-OMI
    Brand: OMI
    (2)
    $9.45 each
    $223.75 box of 25
    $8.95 each
    115
    Tue, Sep 3
    115
    QtyArrives
    115 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit Aquastat<br>130°F to 270°F Range<br>Manual Reset Product Image
    $149.99 each
    $575.96 box of 4
    $143.99 each
    168
    Tue, Sep 3
    168
    QtyArrives
    168 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High or Low Limit Aquastat 100-240&#176;F Range<br>5&#176;F to 30&#176;F Differential Product Image
    $109.99 each
    $419.96 box of 4
    $104.99 each
    167
    Tue, Sep 3
    167
    QtyArrives
    167 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit Remote Bulb Aquastat, Manual Reset<br>130°F to 270°F Product Image
    $135.99 each
    $389.97 box of 3
    $129.99 each
    166
    Tue, Sep 3
    166
    QtyArrives
    166 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • Temperature Aquastat for "00" Series Circulators (95&#176;F to 115&#176;F) Product Image
    $31.95 each
    $183.90 box of 6
    $30.65 each
    41
    Tue, Sep 3
    91
    QtyArrives
    41 Tue, Sep 3
    50 Wed, Sep 4 – Thu, Sep 5
    Questions? Call 1-888-757-4774
  • High Limit Vertical Mount Aquastat Relay<br>15°F Differential Product Image
    $221.99 each
    $635.97 box of 3
    $211.99 each
    245
    Tue, Sep 3
    245
    QtyArrives
    245 Tue, Sep 3
    Questions? Call 1-888-757-4774
  • High Limit Horiz. Mount Triple Aquastat Relay Product Image
    High Limit Horiz. Mount Triple Aquastat Relay
    SKU: L8124C1003
    Brand: Honeywell
    (15)
    $219.99 each
    $629.97 box of 3
    $209.99 each
    66
    Tue, Sep 3
    66
    QtyArrives
    66 Tue, Sep 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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