This flow-thru style was used on the 1999-2002 Hot Spot RE, RLX (Z & ZQ model-round spa), 1999-2002 Hot Spot SE & SLX (Y & YQ model-square spa) and 2001-2002 Hot Spot W & WQ model (square spa-wood siding). It was also used on the 2000-2002 Solana X model, 2003-2005 Solana TX model (triangle spa), 2003-2005 Solana RX model (round spa) and the 2003-2005 Solana SX model (square spa). This heater is attached to the control and to the spa's plumbing using the attached compression fittings at both ends. Click the "More Info" button for details.

This flow-thru style is used on the 2006-2007 Solana TX (triangle spa), RX (round) & SX (square) as well as the 2006-current Hot Spot Mallorca, Sorrento, Trinidad & Tobago spa models. This heater is connected to the control box and to the spa's plumbing using the attached compression fittings at both ends. Click the "More Info" button for details.