
Thermcore / Global Heating - Cal Spa 1990-92 1.5in.x15.75in. - C2550-0021 Cal Spa flow-through stainless steel heater assembly. 5.5kW @ 240V (1.375kW @ 120V). 1.5” x 15.75”. External thermowells. Product notes: Cal Spas recommends complete assembly replacement. Replacing element is not practical with this heater, due to tapered tube ends. Used in 1990-1992 models. # C2550-0021, 48-3300-10-021H