Simple Greywater Systems โ FarmPal
Reuse water from sinks, showers, and washing machines to irrigate landscape plants. A single household generates 20-40 gallons of reusable greywater daily.
Cost Range
$50-500 depending on complexity
Water Yield
20-40 gallons per person per day
Key Points
- ๐งGreywater = sink, shower, laundry water (NOT toilet, kitchen sink with food waste, or dishwasher)
- ๐งSimple "laundry to landscape" systems require no permits in many states
- ๐งUse only biocompatible soaps (no boron, chlorine, or sodium)
- ๐งMust be distributed below mulch never sprayed or pooled on surface
- ๐งDon't store greywater use within 24 hours
Installation Steps
- 1Check local codes many areas allow simple laundry-to-landscape without permit
- 2Redirect washing machine drain hose to garden (simplest system)
- 3Use 1-inch poly pipe to distribute water to multiple plants
- 4Distribute into mulch basins around trees and large shrubs
- 5Install 3-way diverter valve to switch between sewer/greywater
- 6Switch to plant-safe detergent (Oasis, Sal Suds, Dr. Bronner's)
- 7Never use on root vegetables or leafy greens eaten raw
Practical Checklist
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Supplies
Safety Steps
Testing & Verification
Tips
- ๐กOne load of laundry = ~30 gallons enough to deeply water a fruit tree
- ๐กShower greywater requires more plumbing but yields the most water
- ๐กArt Ludwig's "Create an Oasis with Greywater" is the definitive reference
- ๐กBranched drain systems use gravity no pump needed on sloped sites
- ๐กMany drought-prone areas are actively encouraging greywater reuse with rebates