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Well, 1/2" NPT fitting Line Voltage Thermostat Single-stage, Non-programmable 24-Volt Thermostat
Well, 1/2" NPT fitting
Our price: $18.95
Line Voltage Thermostat
Our price: $32.95
Well, 1/2" NPT fitting. Line Voltage Thermostat (120-volt) used to start the fan on forced-air systems.
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).
24-Volt Transformer Programmable 24-Volt Thermostat Well, SS, 1/2" NPT fitting
24-Volt Transformer
Our price: $39.95
Used with 24-volt wall thermostat and 24-volt zone valves.
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).
Recommended to be used with Pool Aquastat (p/n 191), sold separately.  Stainless Steel Well, 1/2" NPT fitting.
Thermal Actuator, 2-wire Thermal Actuator, 4-wire Plug-in Thermostat
Thermal Actuator, 2-wire
Our price: $56.95
Thermal Actuator, 4-wire
Our price: $76.95
Plug-in Thermostat
Our price: $92.67
Optional thermal actuator (compatible with stainless steel radiant manifold kits) provides individual loop flow control on multi-zoned manifold. 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. Plug-in Thermostat, 13.5-amp rated, 110-Volt, is for operating fan.
Fixed Aquastat, 175°F, 1/2" MPT fitting Fixed Aquastat, 190°F, 1/2" MPT fitting Pool Aquastat, 1/2" NPT fitting
Non-adjustable, immersible, Fixed Aquastat, 175°F, 1/2" MPT fitting. Non-adjustable, immersible, Fixed Aquastat, 190°F, 1/2" MPT fitting For controlling water temperature in pools, spas, etc., Immersable, temperature range of 40-180°F 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 Aquastat, Strap-on
Aquastat, Strap-on
Our price: $224.95
For 1992 and older Classic outdoor wood furnaces, adjustable from 100-240°F. Adjustable between 110-240°F, immersible, with 1/2" MPT fittings on well (either close on rise or open on rise). Recommended operating setting is between 165-195°F. Can be installed on Classic model furnaces prior to serial number 25151 that were manufactured with a fixed aquastat.
Strap-on Aquastat, adjustable from 65-200˚F with 5 to 30-degree differential.
Multi-stage, 24-Volt Thermostat Actuator - Classic dual fuel burners purchased after Dec 14, 2015 Actuator Kit - Classic burners (excluding CL 7260)
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.
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.
Actuator Kit - Classic 7260 burners
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.