The complete plumbing package is the way to go. Everything is in this kit with plenty of connectors that will allow for changing out chillers and pumps should something go wrong with them. I am not a plumber, but between this kit and the youtube videos I was able to build my own plunge which is now something I do daily and in luxury at a reduced cost. I have paid to plunge at a recovery center that had multiple tubs and the tub that I built is just as nice as the $3,000+ plunges that were at the recovery center. I would highly recommend buying the kit and building a plunge for yourself. Its very rewarding. Also, buy the complete plans or watch the video for the complete build. Everything is there for you to have success.