Spa Power SP1000 heater element / tube assembly available in following kilowatt ratings - 2.0kw, 3.0kw, 3.5kw, 4.5kw, 5.5kw, 6.0kw.
This assembly comes with new high-temperature sensors and water sensor. Standalone elements are not available. Does not suit other Spa Power Controllers. May require re-wiring by a qualified person.
New style heaters have Titanium elements and a slightly different body. The old ones have been superseded by this new Retrofit. Note that some of the less-common 4-6kW heaters are still the older style.
Older style heaters are more susceptible to poor water chemistry due to their Teflon coating. Bromine and other Sanitizers that induce low pH are the cause of this. Obvious signs of damage due to water chemistry is not covered by warranty. See example of non-warranty damage. Note that Davey SpaQuip interchanges the new and old style heater assemblies, so you may get one or the other.