Complete Library
Step-by-step DIY instructions for the most common residential greywater systems.
The most popular no-permit system. Complete materials list, diverter valve installation, mulch basin construction, and troubleshooting.
⏱ 14 min · 💰 $80–$200 · 🔧 Beginner
Read the guideUsing shower water requires permits in most states and a surge tank. Learn what's involved, which states allow it, and installation steps.
⏱ 10 min · 💰 $400–$1,200 · 🔧 Intermediate
Read the guideHow deep, how wide, and how many. Soil-type-adjusted sizing with the percolation test method and basin shape options.
⏱ 8 min · Design guide
Read the guideNot all detergents are safe for plants. What to avoid (sodium, boron, bleach), which brands work, and how to transition your laundry routine.
Soap guideDIY vs. contractor costs, permit fees, and honest annual savings calculations for L2L and shower systems.
Cost guideSeveral states protect your right to install greywater despite HOA rules. Know which ones and how to get approval.
HOA guideWhich system is right for your climate and property? Side-by-side comparison and when to use both together.
Comparison guideMonthly, seasonal, and annual tasks to keep your system running smoothly. Includes a troubleshooting reference table.
Maintenance guideInteractive tool — enter your household size, washer type, and soil conditions to get exact basin dimensions and savings estimates.
Open calculator