Cheap Water Storage

My idea for water storage is easy, cheap, and self renewing. Everyone who preps for emergencies, natural or otherwise, is highly aware of shelf life. Water is a challenge due to the daily amount needed. Take a trip to a city dump, or call some local plumbers to find find some broken water heaters. It does not matter if they are gas or electric because they will used for storing instead of heating. Make sure the tank is good and they don't leak. You plumb 5 - 40 gallon tanks in series being fed from the water supply line to your home, with a one way check valve so they don't get emptied back into the grid in case pf pressure loss, and the feeding the cold water to your home from the last tank. If SHTF and your community water service is interrupted, you will have 200 gallons (5-40 gallon tanks) of fresh water in reserve. By keeping it tied in to your home, it refreshes itself every time you normally use water. There is a drain for the tanks near the bottom of the tanks that can be used to access the water when needed, with a little extra plumbing you could also make a manifold to collect the waters from the tanks with a valve at the very end, instead of having to access each tank individually.