I was planning to get a few IBC totes for rain water but after doing the math it doesn't help me very much. Just watering the back yard for a week used 9K gallons if you go by the 1" per week rule. And with our low rainfall amounts it looks even worse. The cost of the install doesn't pass the sniff test in my case. If I were to build a house etc I would put in a large buried cistern for rainwater so it can hold in the tens of thousands of gallons vs hundreds.
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