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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.
Single-stage, Non-programmable 24-Volt Thermostat Thermal Actuator, 2-wire Programmable 24-Volt Thermostat
Thermal Actuator, 2-wire
Our price: $37.05
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. 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).
Well, SS, 1/2" NPT fitting Thermal Actuator, 4-wire Fixed Aquastat, 190°F, 1/2" MPT fitting
Thermal Actuator, 4-wire
Our price: $50.57
Recommended to be used with Pool Aquastat (p/n 191), sold separately.  Stainless Steel Well, 1/2" NPT fitting. 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 Multi-stage, 24-Volt Thermostat
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. 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.
Actuator - Classic dual fuel burners purchased after Dec 14, 2015 Actuator Kit - Classic burners (excluding CL 7260) Actuator Kit - Classic 7260 burners
Replacement actuator for dual fuel burner purchased December 15th, 2015 and later. Only order part number 8200280 as the replacement if you have already installed one of these actuator kits: 2500179(CLDR) or 2500180(CL7260DR). Kit to replace actuator part number 5742 with the current actuator used on dual ready burner kits (part numbers 6833 and 6834) for all Classic furnaces, excluding the CL 7260. Kit contains actuator, burner clamp, sensor switch assembly, 12-1/8" actuator shaft and closeoff plate. If kit 2500179 was previously purchased then the replacement actuator only would be part number 8200280.
Kit to replace actuator part number 5742 with the current actuator used on dual ready burner kits (part numbers 6843 and 6844) for the Classic 7260. Kit contains actuator, burner clamp, sensor switch assembly, 16-5/8" actuator shaft and closeoff plate. If kit 2500180 was previously purchased then the replacement actuator only would be part number 8200280.