Reclaimed or recycled water, also referred to as wastewater reuse or water reclamation, is the process of diverting wastewater into a system where it can be used for non-potable applications.

Introduction
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 in homes.

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.

Materials
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.

Applications
Be sure to consult your local regulations and the pipe and fitting manufacturer when selecting any piping systems for reclaimed water systems. Codes can vary significantly from location to location.

Advantages
CPVC, PEX, PE-RT and PP pipe and fitting systems intended for reclaimed water systems have all the same advantages of installation, cost, and durability as when using these products for potable hot-and cold-water plumbing systems.

Advantages of the piping materials for this application include:

• Resistance to corrosion, tuberculation, deposits
• Chlorine and chloramine resistance (when used during the water treatment process)
• Flexibility to speed installation
• Lightweight, easy to transport
• Many sustainability benefits
• Noise and water hammer resistance
• No scrap value, avoiding jobsite theft
• Durability and toughness to survive jobsite installations
• No flame used for joining with many fitting and joining options

See also
Design Guide - Residential PEX Water Supply Plumbing Systems.