Eric Aune visits an off-grid property in the Texas Hill Country with special guest Colie Curry, Owner and Master Plumber at Hill Country Plumbing, to examine its rainwater catchment and filtration system. The setup collects water from building roofs and air conditioning condensate, directing it through a first-flush diverter before storing it in multiple large tanks. From there, a pump sends water through several stages of sediment and carbon filtration, followed by UV treatment to address bacteria. They also discuss water quality, pH levels, additional treatment for hardness, and the maintenance involved in keeping a residential rainwater collection system operating properly.

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