I just bought a trailer and I was watching a RV show on cable the other day. I'm a bit confused on what they told me to do. Before you go out to use the trailer they said to sanitise the water by puting in 1/4 cup of chloine per 15 gallons of water and the open the hot water valve untill you smell chlorine and open up all faucets till you smell them. My question is I can understand doing that because while you are driving the water will splash around the tank and clean the pipes while opening them up. How can you use that water with that smell of chlorine in it or drink it. They never said to drain it before use. My inlaws do that but drain in before use and then refill it. Which way is right? thanks :-\