So I'm in the process of building a home that will be on 100% rainwater for my family of 5.
Going to have a standing seam metal roof on the house that will catch rainwater for 30,000 gallons of storage capacity.
The contractor who seems very experienced says he recommends using two 15,000 gallon fiberglass tanks.
I want to use the most non-toxic, potable tank possible.
My online research tells me that the steel tanks that are available use a "food grade" plastic liner in them. I really wanted to stay away from plastic, but they tell me that their clients have had the water tested and have never found any type of contaminant from the liner.
Also, it seems that fiberglass is very inert and similarly water testing has never showed any contamination from the resins (so I'm told).
OK, Permies whats the truth? Can I trust fiberglass or food grade plastic liners for the water I'm providing my wife and kids?
I know ferro cement and concrete is another way to go, having trouble finding a contractor that will install it though. For simplicity I like the products above, but I don't want them to come at a cost to our health.
Any advice is so greatly appreciated!