Dimension One Spa 4kw 240v Crystal Pure Lo-Flo Heater part number E2400-0004. The E2400-0004 measures 3" x 10"and has 2 mounting studs, 1 external thermowell, no pressure switch tap, 1.5" union tail pieces and wire leads. Replaces the D1 Crystal Pure heater froms 1995-1996. Can also replace 48-3600-40-004.
Manufacturer's 1 year limited warranty free of defects