Greywater Systems: Reuse and Recycling Guide A greywater system captures wastewater from showers, bathtubs, bathroom sinks, and laundry and reroutes it for beneficial reuse—most commonly garden irrigation. Installing a greywater system can cut household freshwater demand by roughly 30–50% depending on behavior and system design, while lowering the load sent to sewers. This article explains what counts as greywater, how common systems work, permit and health considerations, step-by-step planning and installation guidance for DIYers, and long-term maintenance so a greywater system performs safely and reliably. TL;DR: - Install a laundry-to-landscape greywater system to reuse about one-third of household wastewater with low cost and simple maintenance. - Choose branched-drain or pumped storage for seasonal buffering or when precise distribution is needed; check local permits before building. - Follow a routine maintenance schedule (monthly filter checks, annual inspections) and use low-sa...