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Aquastats (134 Products)

An aquastat is a device used in hydronic heating systems for controlling water temperature. To prevent the boiler from firing too often, aquastats have a high limit temperature and a low limit. If the thermostat is calling for heat, the boiler will fire until the high limit is reached, then shut off (even if the thermostat is still calling for heat). The boiler will re-fire if the boiler water temperature drops below a range around the high limit. The high limit exists for the sake of efficiency and safety.

https://www.thermometercentral.com/product_detail/honeywell-l8148e1299-high-limit-aquastat-relay-120v-180240f
Honeywell L8148E1299 High Limit Aquastat Relay 120V 180-240F

SKU: L8148E1299

16 available in stock

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$0.00
https://www.thermometercentral.com/product_detail/honeywell-l8148e1299-high-limit-aquastat-relay-120v-180240f
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170
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$0.00
https://www.thermometercentral.com/product_detail/honeywell-l8148e1299-high-limit-aquastat-relay-120v-180240f/all
$239.57 /ea
$1,160.43 (Box of 5)
$2,263.40 (Box of 10)
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https://www.thermometercentral.com/product_detail/slant-fin-boiler-412-681-000-aquastat-l4081a1023-mvgmvgx
Slant Fin Boiler 412-681-000 Aquastat L4081A1023 (MVG/MVGX)

SKU: 412-681-000

Usually Ships 1 week

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$0.00
https://www.thermometercentral.com/product_detail/slant-fin-boiler-412-681-000-aquastat-l4081a1023-mvgmvgx
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0
0
$0.00
https://www.thermometercentral.com/product_detail/slant-fin-boiler-412-681-000-aquastat-l4081a1023-mvgmvgx/all
$316.58 /ea
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https://www.thermometercentral.com/product_detail/lochinvar-100027028-aquastat
Lochinvar 100027028 Aquastat

SKU: 100027028

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/lochinvar-100027028-aquastat
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0
0
$0.00
https://www.thermometercentral.com/product_detail/lochinvar-100027028-aquastat/all
$312.93 /ea
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https://www.thermometercentral.com/product_detail/burnham-boiler-80160428-aquastat-l8124b1039
Burnham Boiler 80160428 Aquastat L8124B1039

SKU: 80160428

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-80160428-aquastat-l8124b1039
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0
0
$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-80160428-aquastat-l8124b1039/all
$449.76 /ea
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https://www.thermometercentral.com/product_detail/burnham-boiler-80160424-aquastat-l8148b1015
Burnham Boiler 80160424 Aquastat L8148B1015

SKU: 80160424

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-80160424-aquastat-l8148b1015
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0
0
$0.00
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$287.99 /ea
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https://www.thermometercentral.com/product_detail/burnham-boiler-80160431-24v-aquastat
Burnham Boiler 80160431 24V Aquastat

SKU: 80160431

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-80160431-24v-aquastat
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0
0
$0.00
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$280.28 /ea
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https://www.thermometercentral.com/product_detail/burnham-boiler-80160454-aquastat
Burnham Boiler 80160454 Aquastat

SKU: 80160454

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-80160454-aquastat
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0
0
$0.00
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$273.95 /ea
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https://www.thermometercentral.com/product_detail/burnham-boiler-6018903-aquastat-100240-degree-f-manual-reset
Burnham Boiler 6018903 Aquastat 100-240 -Degree F Manual Reset

SKU: 6018903

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-6018903-aquastat-100240-degree-f-manual-reset
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0
0
$0.00
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$160.12 /ea
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https://www.thermometercentral.com/product_detail/burnham-boiler-10229201-aquastat-limit-manual-reset-plugin-card
Burnham Boiler 102292-01 Aquastat Limit Manual Reset Plug-In Card

SKU: 102292-01

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-10229201-aquastat-limit-manual-reset-plugin-card
0
0
0
$0.00
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$144.19 /ea
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https://www.thermometercentral.com/product_detail/burnham-boiler-80160470-capillary-aquastat-9015c
Burnham Boiler 80160470 Capillary Aquastat 90/15C

SKU: 80160470

Usually Ships 2-3 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/burnham-boiler-80160470-capillary-aquastat-9015c
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0
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$0.00
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$132.40 /ea
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https://www.thermometercentral.com/product_detail/envirotec-pc010021-clipon-aquastat-34
Enviro-Tec PC-01-0021 Clip-On Aquastat 3/4"

SKU: PC-01-0021

Stock Closeout - Call for Availability

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$0.00
https://www.thermometercentral.com/product_detail/envirotec-pc010021-clipon-aquastat-34
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$0.00
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$88.11 /ea
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https://www.thermometercentral.com/product_detail/beckett-7600b000lu-aquasmart-control-24v
Beckett 7600B000LU Aquasmart Control 24V

SKU: 7600B000LU

Usually Ships 1-2 Weeks

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$0.00
https://www.thermometercentral.com/product_detail/beckett-7600b000lu-aquasmart-control-24v
0
0
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$0.00
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$161.86 /ea
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