Aquastats & Wells

  • $97.95 each
    $281.85 box of 3
    $93.95 each
    344
    Thu, Feb 28
    344
    QtyArrives
    344 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High Limit Vertical Mount Aquastat Relay 15°F Differential
    SKU: L8148E1265
    Brand: Honeywell
    (76)
    $211.95 each
    $611.85 box of 3
    $203.95 each
    429
    Thu, Feb 28
    429
    QtyArrives
    429 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High Limit Horiz. Mount Aquastat Relay 8°F Differential
    SKU: L8148A1017
    Brand: Honeywell
    (68)
    $166.95 each
    $639.80 box of 4
    $159.95 each
    367
    Thu, Feb 28
    367
    QtyArrives
    367 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • 140-240F AquaStat Relay w/ Vent Damper Connection
    SKU: L8148E1257
    Brand: Honeywell
    (30)
    $226.95 each
    $650.85 box of 3
    $216.95 each
    155
    Thu, Feb 28
    155
    QtyArrives
    155 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $90.95 each
    $349.40 box of 4
    $87.35 each
    570
    Thu, Feb 28
    570
    QtyArrives
    570 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • 120 Vac Oil Electronic Aquastat
    SKU: L7224U1002
    Brand: Honeywell
    (35)
    $137.15 each
    $394.95 box of 3
    $131.65 each
    605
    Thu, Feb 28
    605
    QtyArrives
    605 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • Aquastat Relay 8°F Differential
    SKU: L8148J1009
    Brand: Honeywell
    (42)
    $192.95 each
    $743.80 box of 4
    $185.95 each
    218
    Thu, Feb 28
    218
    QtyArrives
    218 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • 3/4" Aquastat Well
    SKU: 121371B
    Brand: Honeywell
    (10)
    $28.75 each
    $109.80 box of 4
    $27.45 each
    248
    Thu, Feb 28
    248
    QtyArrives
    248 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • 1/2" Aquastat Well
    SKU: 121371A
    Brand: Honeywell
    (10)
    $27.45 each
    $105.40 box of 4
    $26.35 each
    325
    Thu, Feb 28
    325
    QtyArrives
    325 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $109.95 each
    $423.80 box of 4
    $105.95 each
    88
    Thu, Feb 28
    88
    QtyArrives
    88 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High/Low Limit Circulator Horiz. Mount Aquastat 100-240°F
    SKU: L6006A1145
    Brand: Honeywell
    (13)
    $103.95 each
    $395.80 box of 4
    $98.95 each
    306
    Thu, Feb 28
    306
    QtyArrives
    306 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $148.95 each
    $428.85 box of 3
    $142.95 each
    245
    Thu, Feb 28
    245
    QtyArrives
    245 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High Limit, Manual Aquastat Controller 130°F to 270°F
    SKU: L4006E1000
    Brand: Honeywell
    (1)
    $98.95 each
    231
    Thu, Feb 28
    231
    QtyArrives
    231 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $55.95 each
    168
    Thu, Feb 28
    168
    QtyArrives
    168 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $214.95 each
    $620.85 box of 3
    $206.95 each
    166
    Thu, Feb 28
    166
    QtyArrives
    166 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High/Low Limit Aquastat 40°F to 180°F Range
    SKU: L4006A1959
    Brand: Honeywell
    (9)
    $109.95 each
    $423.80 box of 4
    $105.95 each
    244
    Thu, Feb 28
    244
    QtyArrives
    244 Thu, Feb 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
    178
    Thu, Feb 28
    178
    QtyArrives
    178 Thu, Feb 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
    111
    Thu, Feb 28
    111
    QtyArrives
    111 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $139.95 each
    $404.85 box of 3
    $134.95 each
    163
    Thu, Feb 28
    163
    QtyArrives
    163 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High Limit Vertical Mount Aquastat Relay 15°F Differential
    SKU: L8148E1299
    Brand: Honeywell
    (13)
    $209.95 each
    $604.65 box of 3
    $201.55 each
    198
    Thu, Feb 28
    198
    QtyArrives
    198 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $107.95 each
    $415.80 box of 4
    $103.95 each
    129
    Thu, Feb 28
    129
    QtyArrives
    129 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High Limit Horiz. Mount Triple Aquastat Relay
    SKU: L8124C1003
    Brand: Honeywell
    (14)
    $213.55 each
    $614.85 box of 3
    $204.95 each
    81
    Thu, Feb 28
    81
    QtyArrives
    81 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • High Limit Aquastat 130°F to 270°F Range Manual Reset
    SKU: L4006E1067
    Brand: Honeywell
    (3)
    $152.95 each
    $587.80 box of 4
    $146.95 each
    151
    Thu, Feb 28
    151
    QtyArrives
    151 Thu, Feb 28
    Questions? Call 1-888-757-4774
  • $31.95 each
    $183.90 box of 6
    $30.65 each
    14
    Thu, Feb 28
    48
    QtyArrives
    14 Thu, Feb 28
    34 Mon, Mar 4 – Tue, Mar 5
    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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