53S Heat Jacket Kit Hydrothermix Parts Bag Sold Separately

This item may still be available from the manufacturer however Horizon has discontinued carrying it.

"Thermal Wrap" Heat Transfer Kit
This patented new heat transfer system absorbs the heat energy generated by the pump/motor and redistributes it back into the water. The Hydrothermix system will maintain and increase water temperature, allow the motor to run cooler, and increase its longevity. Hydrothermix is manufactured from a specially engineered polymer compound that insures maximum thermal conductivity and durability. There are no moving parts, no electrical connections, and nothing to wear out. Hydrothermix jacket kits will allow retrofit to almost any spa or bath wet end