Fiberglass SpecialtiesStainless steel, 2-1/4″ x 15″ in-line 5.5kW /230v heater assembly. Normally used for Baptistry or Baptismal applications. The 5″ x 7″ enclosure houses a thermostat, hi limit switch, pressure switch, 230v contactor, and a heater on indicator light. Heater gaskets, nuts and tailpieces are also supplied with this assembly.NOTE: This stand-alone heater unit controls only the heater. It does not have any component circuits or any plug-ins for any components. A pump, with it’s own power source, is required to flow water through the heater.