Sundance Spas Titanium Heater Assembly 2.9kW - Laing. Pressure switch sold separately. Suits 19mm or 3/4" tube hose. Also suits Jacuzzi and other spas. May be suitable to replace older 2.1kW *if* you have enough power to your spa.
2008+ Dover, 2004-2007 Metro, 2003-2005 Lagunas, 200-2007 Solo, 2000-2006 Caprio & Caprio ST, 200-2003 Tango, and many others! May be listed as part number: 6500-063 or others.
Jacuzzi J-300 Series Spas. AKA Truheat SJB. Sundance Spas p/n 6500-062, Truheat p/n. C3226-2
Replaces 2.7kW heaters. Ensure there is enough power. Note that pressure switch and inlet may be in slightly different locations, as the original manufacturer of these no longer makes them.