Don’t be using this in Colorado
In Colorado it is illegal to catch rainwater and snow melt in rain barrels because, by law, the water belongs to whoever owns rights to the waterways.
Rain water should “belong” to wherever it falls. Bizarre, unworkable, arguably lunatic laws like those in Colorado are counter-productive. And the US southwest has far too many water regulations and prohibitions like this. Upstream rights. Got-here-first rights. And of course the ever popular, “we stole it and aren’t giving it back” argument.
Meanwhile, the Colorado River often no longer empties into the ocean because all the water has been diverted. Regional wide planning and uniform laws are needed, not the crazy quilt mess that exists now.