Hayward UHXWPAK1930 Water Adapter Kit to replace Pentair® MasterTemp® Heater - This first-of-its-kind Adapter Kit is the easiest way to replace Pentair® MasterTemp® heaters with Hayward® Universal H-Series heaters. It eliminates the need for site re-plumbing of water piping attached to the equipment pad, saving both time and hassle. It is convenient to install - just align, adapt, and connect.