Well after seeing many threads and now hearing from my local dive shop about people hookah diving with a $40 Harbor Freight compressor and a cheap PVC air hose I had to try for myself, I did as many threads say cleaned out the tank and hose using simple green and then properly sanitized, most people's concern is the possibility of contaminants and toxins in the air supply, living here in Seabrook Texas and having several neighbors that work for NASA I have found a contact that is willing to test the air from this system in route to deliver air sample now will post results once they are returned