Water Saving Devices

[leilanidude]

Most insurers require a minimum 10,000 gallon tank, and mortgage companies require insurance, so 10,000 became the de facto standard. Of course not everybody has insurance, or a mortgage, so many people don't need a tank that large.
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That standard of 10,000 gallon tank used to state that you had to have the fire department hookup on the tank. However, the fire department won't use your catchment tank water if there is a fire...