Identifying Purple PVC Pipe for Reclaimed Water Systems

Purple Pipe Identification: Reclaimed Water Irrigation Systems

A homeowner needs to lower a backflow preventer connected to 3/4" copper on one side and purple pipe on the other. The county uses reclaimed water for irrigation. They need to identify the purple pipe material to purchase correct couplings (SharkBite for copper, appropriate fitting for purple pipe).

What Is Purple Pipe?

Purple pipe is PVC (polyvinyl chloride) manufactured with purple pigment as a universal color code for non-potable/reclaimed water. It's standard Schedule 40 or 80 PVC, not Kitec, polybutylene, or other materials. The color is mandated by plumbing codes to prevent cross-connection with drinking water.

Coupling Solutions

• Copper side: SharkBite push-fit coupling (correct size for 3/4" copper)
• Purple PVC side: Standard PVC coupling with primer and cement, or push-fit PVC coupling (SharkBite makes PVC-compatible fittings)
• Transition: No direct copper-to-PVC push fitting exists; use male/female adapters with threaded transition or a short nipple

Backflow Preventer Height Requirements

For a Febco 765 (pressure vacuum breaker):

• Must be 12" above highest sprinkler head/emitter
• If lot slopes, measure from highest elevation point
• If required height can't be met, replace with reduced pressure principle assembly (e.g., Wilkins 975XL)

Additional Recommendations

• Add hose bibb downstream of backflow for reclaimed water access
• Secure piping and device with wall brackets
• Maintain 45° angle on test cocks and ball valves for winterization
• Verify local codes for reclaimed water signage and labeling

Important Note

Kitec is a recalled brass fitting system (dezincification failure), not purple PVC. Neighbor's identification was incorrect.