If you have not done so already, start by sizing your spa. For a vinyl covered spa use our calculator here. For uncovered spas using this calculator.  The calculator will tell you if you need the self-priming kit or you can get away with the flood-priming kit. Listed below are differently sized Flood-Priming Systems. If you get stuck, you can even submit the calculator and we'll get all the details. We're here to help, we love to help - just email us :)