Bath Kitchen Laundry Garage/Basement Landscaping Landscaping Pool/Spa Water Meter Patio


Greywater and/or Dual Plumbing System
Greywater and/or Dual Plumbing System
 Best Ways to Save & Drought Tips
 Water Savings
 Benefits & Costs
 Environmental Benefits
 Future Trends
 Leak Detection
 Purchase Tips
 Where to Get
 Incentives or Rebates
 Installation Tips
 Timing & Seasonality
 Application Options (automatic vs. manual)


Greywater and/or Dual Plumbing System Timing and Seasonality

Greywater, usually defined as “untreated waste water which has not come into contact with toilet waste”, is used as a supplementary irrigation supply for watering plants. Because most greywater systems do no include large cisterns or storage tanks the greywater must be used promptly or it is piped off to the sewer.

In areas with a year round irrigation season, greywater can be used continuously. However, much of the country where the growing season ends in the fall cannot make use of greywater for a substantial part of the year. Theoretically greywater could be used to water indoor plants during the winter months, but this could prove problematic if the greywater system does not provide sufficient filtration to remove potential sources of odor and bacteria.

Because of these seasonality issues, greywater systems are more practical and cost effective in warmer climates with longer irrigation seasons.

© Copyright 2009, California Urban Water Conservation Council, All Rights Reserved

contact webmaster