Are you planning on building a pool, and possibly adding a spa to the design? Well, here's something you need to know... Klapprodt Pools is building a better spa! Every standard gunite spa is now plumbed with 3" suction lines and 3" return lines allowing superior water flow to improve therapeutic benefits. In addition, Waterway thread in jets are installed with a variety of flow options to customize your spa experience. We believe you should enjoy your hot tub!