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Old 04-16-09, 08:20 AM   #9
Tango Charlie
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Well, the goal is to meter in rainwater with the city water going to the toilet, in varying proportions. During a drought, more city water will need to be used, to prevent exhausting the cistern, and to keep things flushing smoothly.

That's what I was looking to see if anything was already out there, commercially or otherwise. Haven't found anything, so it looks like we'll be doing this from a clean sheet of paper, as they say. I'm thinking it'll take some sort of actuated valve that will interface the two systems. And it must be automatic, so the homeowner doesn't have to fiddle with it. Initially, it'll probably be used in a 'smart house' that's all wired up into a computer. But we'd also like to make it a stand alone system that can be retrofitted into any house.

I'm learning A LOT on this project. Let me research ABS vs. PVC. I don't think rainwater affects either. It's the metal piping that's the problem, because of corrosion.

Thanks for the feedback, guys!
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