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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
    355
    Thu, Sep 5
    718
    QtyArrives
    355 Thu, Sep 5
    71 Fri, Sep 6
    292 Mon, Sep 9 – Tue, Sep 10
    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
    503
    Thu, Sep 5
    763
    QtyArrives
    503 Thu, Sep 5
    260 Mon, Sep 9 – Tue, Sep 10
    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
    227
    Thu, Sep 5
    461
    QtyArrives
    227 Thu, Sep 5
    36 Fri, Sep 6
    198 Mon, Sep 9 – Tue, Sep 10
    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
    223
    Thu, Sep 5
    291
    QtyArrives
    223 Thu, Sep 5
    58 Fri, Sep 6
    10 Mon, Sep 9 – Tue, Sep 10
    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
    284
    Thu, Sep 5
    643
    QtyArrives
    284 Thu, Sep 5
    23 Fri, Sep 6
    336 Mon, Sep 9 – Tue, Sep 10
    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
    327
    Thu, Sep 5
    525
    QtyArrives
    327 Thu, Sep 5
    22 Fri, Sep 6
    176 Mon, Sep 9 – Tue, Sep 10
    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
    146
    Thu, Sep 5
    417
    QtyArrives
    146 Thu, Sep 5
    35 Fri, Sep 6
    236 Mon, Sep 9 – Tue, Sep 10
    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
    188
    Thu, Sep 5
    489
    QtyArrives
    188 Thu, Sep 5
    42 Fri, Sep 6
    259 Mon, Sep 9 – Tue, Sep 10
    Questions? Call 1-888-757-4774
  • High Limit Immersion Aquastat, 100-200&deg;F Range, 8&deg;F Differential Product Image
    $59.99 each
    78
    Thu, Sep 5
    296
    QtyArrives
    78 Thu, Sep 5
    21 Fri, Sep 6
    197 Mon, Sep 9 – Tue, Sep 10
    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
    147
    Thu, Sep 5
    628
    QtyArrives
    147 Thu, Sep 5
    143 Fri, Sep 6
    338 Mon, Sep 9 – Tue, Sep 10
    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
    134
    Thu, Sep 5
    533
    QtyArrives
    134 Thu, Sep 5
    235 Fri, Sep 6
    164 Mon, Sep 9 – Tue, Sep 10
    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
    92
    Thu, Sep 5
    284
    QtyArrives
    92 Thu, Sep 5
    31 Fri, Sep 6
    161 Mon, Sep 9 – Tue, Sep 10
    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
    107
    Thu, Sep 5
    142
    QtyArrives
    107 Thu, Sep 5
    35 Mon, Sep 9 – Tue, Sep 10
    Questions? Call 1-888-757-4774
  • High Limit, Manual Aquastat Controller<br>130°F to 270°F Product Image
    $104.99 each
    144
    Thu, Sep 5
    320
    QtyArrives
    144 Thu, Sep 5
    26 Fri, Sep 6
    150 Mon, Sep 9 – Tue, Sep 10
    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
    81
    Thu, Sep 5
    222
    QtyArrives
    81 Thu, Sep 5
    141 Mon, Sep 9 – Tue, Sep 10
    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
    113
    Thu, Sep 5
    264
    QtyArrives
    113 Thu, Sep 5
    151 Mon, Sep 9 – Tue, Sep 10
    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
    64
    Thu, Sep 5
    64
    QtyArrives
    64 Thu, Sep 5
    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
    205
    Thu, Sep 5
    205
    QtyArrives
    205 Thu, Sep 5
    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
    68
    Thu, Sep 5
    159
    QtyArrives
    68 Thu, Sep 5
    91 Mon, Sep 9 – Tue, Sep 10
    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
    58
    Thu, Sep 5
    178
    QtyArrives
    58 Thu, Sep 5
    120 Mon, Sep 9 – Tue, Sep 10
    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
    58
    Thu, Sep 5
    175
    QtyArrives
    58 Thu, Sep 5
    71 Fri, Sep 6
    46 Mon, Sep 9 – Tue, Sep 10
    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
    38
    Thu, Sep 5
    88
    QtyArrives
    38 Thu, Sep 5
    50 Tue, Sep 10 – Wed, Sep 11
    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
    50
    Thu, Sep 5
    244
    QtyArrives
    50 Thu, Sep 5
    194 Mon, Sep 9 – Tue, Sep 10
    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
    37
    Thu, Sep 5
    66
    QtyArrives
    37 Thu, Sep 5
    29 Mon, Sep 9 – Tue, Sep 10
    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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