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Aquastats & Wells

Aquastats & Wells

  • High Limit Vertical Mount Aquastat Relay<br>15°F Differential Product Image
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    High Limit Vertical Mount Aquastat Relay 15°F Differential L8148E1265 High Limit Vertical Mount Aquastat Relay 15°F Differential
    SKU: L8148E1265
    Brand: Resideo
    (93)
    $209.99 each
    404
    Wed, Feb 3
    586
    QtyArrives
    404 Wed, Feb 3
    182 Thu, Feb 4
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  • High or Low Limit & Circulator Strap-On Aquastat, 65°F to 200°F Product Image
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    High or Low Limit & Circulator Strap-On Aquastat, 65°F to 200°F L6006C1018 High or Low Limit & Circulator Strap-On Aquastat, 65°F to 200°F
    SKU: L6006C1018
    Brand: Resideo
    (37)
    $95.69 each
    481
    Wed, Feb 3
    631
    QtyArrives
    481 Wed, Feb 3
    150 Thu, Feb 4
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  • High Limit Horiz. Mount Aquastat Relay<br>8°F Differential Product Image
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    High Limit Horiz. Mount Aquastat Relay 8°F Differential L8148A1017 High Limit Horiz. Mount Aquastat Relay 8°F Differential
    SKU: L8148A1017
    Brand: Resideo
    (83)
    $167.99 each
    439
    Wed, Feb 3
    672
    QtyArrives
    439 Wed, Feb 3
    233 Thu, Feb 4
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  • 140-240F AquaStat Relay w/ Vent Damper Connection Product Image
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    140-240F AquaStat Relay w/ Vent Damper Connection L8148E1257 140-240F AquaStat Relay w/ Vent Damper Connection
    SKU: L8148E1257
    Brand: Resideo
    (55)
    $228.64 each
    194
    Wed, Feb 3
    250
    QtyArrives
    194 Wed, Feb 3
    56 Thu, Feb 4
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  • 120 Vac Oil<br>Electronic Aquastat Product Image
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    120 Vac Oil Electronic Aquastat L7224U1002 120 Vac Oil Electronic Aquastat
    SKU: L7224U1002
    Brand: Resideo
    (39)
    $153.23 each
    233
    Wed, Feb 3
    492
    QtyArrives
    233 Wed, Feb 3
    259 Thu, Feb 4
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  • Aquastat Relay<br>8°F Differential Product Image
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    Aquastat Relay 8°F Differential L8148J1009 Aquastat Relay 8°F Differential
    SKU: L8148J1009
    Brand: Resideo
    (56)
    $196.34 each
    177
    Wed, Feb 3
    406
    QtyArrives
    177 Wed, Feb 3
    229 Thu, Feb 4
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  • High or Low Limit Aquastat 100-240°F Range<br>5-30°F Adj Differential Product Image
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    High or Low Limit Aquastat 100-240°F Range 5-30°F Adj Differential L4006A2007 High or Low Limit Aquastat 100-240°F Range 5-30°F Adj Differential
    SKU: L4006A2007
    Brand: Resideo
    (13)
    $88.15 each
    344
    Wed, Feb 3
    528
    QtyArrives
    344 Wed, Feb 3
    184 Thu, Feb 4
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  • 3/4" Aquastat Well Product Image
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    3/4" Aquastat Well 121371B 3/4" Aquastat Well
    SKU: 121371B
    Brand: Resideo
    (17)
    $30.18 each
    259
    Wed, Feb 3
    577
    QtyArrives
    259 Wed, Feb 3
    318 Thu, Feb 4
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  • High Limit Immersion Aquastat, 100-200&deg;F Range, 8&deg;F Differential Product Image
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    High Limit Immersion Aquastat, 100-200°F Range, 8°F Differential L4080B1352 High Limit Immersion Aquastat, 100-200°F Range, 8°F Differential
    SKU: L4080B1352
    Brand: Resideo
    (5)
    $58.19 each
    162
    Wed, Feb 3
    371
    QtyArrives
    162 Wed, Feb 3
    209 Thu, Feb 4
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  • 1/2" Aquastat Well Product Image
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    1/2" Aquastat Well 121371A 1/2" Aquastat Well
    SKU: 121371A
    Brand: Resideo
    (17)
    $26.99 each
    303
    Wed, Feb 3
    736
    QtyArrives
    303 Wed, Feb 3
    433 Thu, Feb 4
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  • High/Low Limit Circulator Horiz. Mount Aquastat<br>100-240°F Product Image
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    High/Low Limit Circulator Horiz. Mount Aquastat 100-240°F L6006A1145 High/Low Limit Circulator Horiz. Mount Aquastat 100-240°F
    SKU: L6006A1145
    Brand: Resideo
    (18)
    $103.99 each
    184
    Wed, Feb 3
    451
    QtyArrives
    184 Wed, Feb 3
    267 Thu, Feb 4
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  • High Limit Protection<br>Low Limit & Circulator Triple Aquastat Relay Product Image
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    High Limit Protection Low Limit & Circulator Triple Aquastat Relay L8124A1007 High Limit Protection Low Limit & Circulator Triple Aquastat Relay
    SKU: L8124A1007
    Brand: Resideo
    (18)
    $219.46 each
    129
    Wed, Feb 3
    194
    QtyArrives
    129 Wed, Feb 3
    65 Thu, Feb 4
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  • Circulator Aquastat<br>5°F to 30°F Adj. Differential 100°F to 240°F Range Product Image
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    Circulator Aquastat 5°F to 30°F Adj. Differential 100°F to 240°F Range L4006B1163 Circulator Aquastat 5°F to 30°F Adj. Differential 100°F to 240°F Range
    SKU: L4006B1163
    Brand: Resideo
    (8)
    $92.39 each
    167
    Wed, Feb 3
    200
    QtyArrives
    167 Wed, Feb 3
    33 Thu, Feb 4
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  • High Limit Strap-On Aquastat, Manual Reset 100°F to 240°F Product Image
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    High Limit Strap-On Aquastat, Manual Reset 100°F to 240°F L4006H1004 High Limit Strap-On Aquastat, Manual Reset 100°F to 240°F
    SKU: L4006H1004
    Brand: Resideo
    (6)
    $156.89 each
    120
    Wed, Feb 3
    266
    QtyArrives
    120 Wed, Feb 3
    146 Thu, Feb 4
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  • High Limit, Manual Aquastat Controller<br>130°F to 270°F Product Image
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    High Limit, Manual Aquastat Controller 130°F to 270°F L4006E1000 High Limit, Manual Aquastat Controller 130°F to 270°F
    SKU: L4006E1000
    Brand: Resideo
    (2)
    $104.99 each
    217
    Wed, Feb 3
    367
    QtyArrives
    217 Wed, Feb 3
    150 Thu, Feb 4
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  • High or Low Limit Remote Bulb Aquastat, 100-240°F<br>5-30°F Adj. Differential Product Image
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    High or Low Limit Remote Bulb Aquastat, 100-240°F 5-30°F Adj. Differential L4008A1015 High or Low Limit Remote Bulb Aquastat, 100-240°F 5-30°F Adj. Differential
    SKU: L4008A1015
    Brand: Resideo
    (12)
    $119.33 each
    99
    Wed, Feb 3
    118
    QtyArrives
    99 Wed, Feb 3
    19 Thu, Feb 4
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  • 3/4" Aquastat Well Product Image
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    3/4" Aquastat Well 121371B-OMI 3/4" Aquastat Well
    SKU: 121371B-OMI
    Brand: OMI
    (1)
    $11.99 each
    146
    Wed, Feb 3
    146
    QtyArrives
    146 Wed, Feb 3
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  • High/Low Limit Aquastat<br>40&#176;F to 180&#176;F Range Product Image
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    High/Low Limit Aquastat 40°F to 180°F Range L4006A1959 High/Low Limit Aquastat 40°F to 180°F Range
    SKU: L4006A1959
    Brand: Resideo
    (9)
    $107.36 each
    163
    Wed, Feb 3
    327
    QtyArrives
    163 Wed, Feb 3
    164 Thu, Feb 4
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  • 1/2" Aquastat Well Product Image
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    1/2" Aquastat Well 121371A-OMI 1/2" Aquastat Well
    SKU: 121371A-OMI
    Brand: OMI
    (3)
    $9.79 each
    274
    Wed, Feb 3
    274
    QtyArrives
    274 Wed, Feb 3
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  • High Limit, Manual Reset Aquastat Controller<br>130&#176;F to 270&#176;F Product Image
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    High Limit, Manual Reset Aquastat Controller 130°F to 270°F L4008E1040 High Limit, Manual Reset Aquastat Controller 130°F to 270°F
    SKU: L4008E1040
    Brand: Resideo
    (1)
    $105.86 each
    129
    Wed, Feb 3
    136
    QtyArrives
    129 Wed, Feb 3
    7 Thu, Feb 4
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  • Temperature Aquastat for "00" Series Circulators (95&#176;F to 115&#176;F) Product Image
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    Temperature Aquastat for "00" Series Circulators (95°F to 115°F) 563-2 Temperature Aquastat for "00" Series Circulators (95°F to 115°F)
    SKU: 563-2
    Brand: Taco
    (4)
    $29.79 each
    82
    Wed, Feb 3
    149
    QtyArrives
    82 Wed, Feb 3
    67 Mon, Feb 8 – Tue, Feb 9
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  • High Limit Horiz. Mount Triple Aquastat Relay Product Image
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    High Limit Horiz. Mount Triple Aquastat Relay L8124C1003 High Limit Horiz. Mount Triple Aquastat Relay
    SKU: L8124C1003
    Brand: Resideo
    (16)
    $221.44 each
    69
    Wed, Feb 3
    104
    QtyArrives
    69 Wed, Feb 3
    35 Thu, Feb 4
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  • High Limit Vertical Mount Aquastat Relay<br>15°F Differential Product Image
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    High Limit Vertical Mount Aquastat Relay 15°F Differential L8148E1299 High Limit Vertical Mount Aquastat Relay 15°F Differential
    SKU: L8148E1299
    Brand: Resideo
    (16)
    $215.17 each
    45
    Wed, Feb 3
    200
    QtyArrives
    45 Wed, Feb 3
    155 Thu, Feb 4
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  • High Limit Aquastat<br>130°F to 270°F Range<br>Manual Reset Product Image
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    High Limit Aquastat 130°F to 270°F Range Manual Reset L4006E1067 High Limit Aquastat 130°F to 270°F Range Manual Reset
    SKU: L4006E1067
    Brand: Resideo
    (5)
    $151.41 each
    50
    Wed, Feb 3
    141
    QtyArrives
    50 Wed, Feb 3
    91 Thu, Feb 4
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FAQs, Manuals & Videos
View Resources

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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