This flexible hose is the jam. I first went into my DIY Cold Plunge adventure with some knowledge from Joe's videos. HOWEVER, I should have paid more attention and followed more of his advice. I redid my plumbing setup with this flexible hose and it made it so much more efficient and clean looking! I also used the Venturi injector he sells (as opposed to the cheap amazon find). It's a proper setup now. If you're on the fence between rigid PVC (or PEX in my case.....) or this flexible spa hose. Get this and follow his instructions to avoid upsets and headaches!