Ahh, Okay! So Water Hose -> Wort Chiller is fine. I was ready to be super anal about sanitation but that totally makes sense. Thanks!The contamination I was refering to was from the air outside or in the garage - dust, tree dirt, anything floating around outside or in the garage. Once the wort gets down below sanitization temps if anything "falls in" you could end up with a contamination problem. You can cover it up with aluminum foil for added protection.