HOTSTART is introducing a new improvement for its line of tank style coolant heaters. The thermostat housing assembly will change from plastic to aluminum on all CB/CL, SB/SL and WL
series engine heaters. This will improve durability, performance and installation flexibility. The new thermostat design will be available January 1, 2010.
The updated housing features a 1” female NPT threaded port for easy connections with male NPT threaded adapters. This will simplify hose connections and eliminate excess hose couplers. The new assembly also features easy access to the interchangeable fixed or  adjustable sensing unit.
The new thermostat design will be available as a component on thermostatically controlled tank style coolant heaters or as a replacement unit for existing and future HOTSTART heaters. Customers will notice a slight difference in part numbers for heaters that  include a thermostat assembly. The three-digit suffixes on existing part numbers will change to -200.

Example of current part number: CB125210-000
Change to: CB125210-200