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Well, 1/2" NPT fitting 24-Volt Transformer Line Voltage Thermostat
Well, 1/2" NPT fitting
Our price: $12.30
24-Volt Transformer
Our price: $24.17
Line Voltage Thermostat
Our price: $26.77
Well, 1/2" NPT fitting. Used with 24-volt wall thermostat and 24-volt zone valves.
Line Voltage Thermostat (120-volt) used to start the fan on forced-air systems.
Well, SS, 1/2" NPT fitting Single-stage, Non-programmable 24-Volt Thermostat Thermal Actuator, 2-wire
Thermal Actuator, 2-wire
Our price: $37.05
Recommended to be used with Pool Aquastat (p/n 191), sold separately.  Stainless Steel Well, 1/2" NPT fitting. Can be used in conjunction with zone valves, zone pumps and forced-air systems or used to operated 24-volt 3-way zone valves (requires 24-volt transformer). Optional thermal actuator (compatible with stainless steel radiant manifold kits) provides individual loop flow control on multi-zoned manifold.
Programmable 24-Volt Thermostat Thermal Actuator, 4-wire Fixed Aquastat, 190°F, 1/2" MPT fitting
Thermal Actuator, 4-wire
Our price: $50.57
Can be used in conjunction with zone valves, zone pumps and forced-air systems or used to operate 24-volt 3-way zone valves (requires 24-volt transformer).
Optional thermal actuator (compatible with stainless steel radiant manifold kits) provides individual loop flow control on multi-zoned manifold. This 4-wire actuator also features end switch for activation of a pump. Non-adjustable, immersible, Fixed Aquastat, 190F, 1/2" MPT fitting
Fixed Aquastat, 175°F, 1/2" MPT fitting Plug-in Thermostat Pool Aquastat, 1/2" NPT fitting
Plug-in Thermostat
Our price: $80.73
Non-adjustable, immersible, Fixed Aquastat, 175F, 1/2" MPT fitting. Plug-in Thermostat, 13.5-amp rated, 110-Volt, is for operating fan.
For controlling water temperature in pools, spas, etc., Immersable, temperature range of 40-180F in one-degree differential.  With pool or hot tub application, it is recommended to use a stainless steel well (p/n 1248), sold separately.
Adjustable Aquastat, Surface Mount Adjustable Aquastat, Immersible Actuator - Classic burners
Actuator - Classic burners
Our price: $135.64
For 1992 and older Classic outdoor wood furnaces, adjustable from 100-240F. Adjustable between 110-240F, immersible, with 1/2" MPT fittings on well (either close on rise or open on rise).  Recommended operating setting is between 165-195F. Actuator - Replacement component for Classic burner.
Multi-stage, 24-Volt Thermostat
Large, easy-to-read screen allows homeowners to use one thermostat to control up to three stages of heat and two stages of cooling. Fully programmable. Must be installed and wired by a qualified service technician.