Reclaimed water systems typically reuse greywater, commonly defined
as wastewater from bathtubs, shower drains, sinks, washing machines, and
dishwashers. Greywater often accounts for 60% of the outflow produced
By designing plumbing systems to separate greywater from blackwater*,
greywater can be recycled for irrigation, toilets, and exterior
washing, resulting in water conservation. The water conservation
potential and environmental benefit is significant. This is another
sustainable application of plastic piping technology.
* Blackwater is wastewater that has come into contact with human waste, and is not reused.
Certain CPVC, PEX, PE-RT, and PP pipe and fitting systems are intended for reclaimed water systems and may contain special color codes or markings on the products to indicate this application. Piping products intended for reclaimed water are typically purple in color.