CSLB Class B General Contractor's License Practice Exam

What color is associated with reclaimed water lines?

1. Green

2. Red

3. Blue

4. Purple

The correct answer is: Purple

The color associated with reclaimed water lines is purple. This color coding is a widely accepted standard in many jurisdictions to identify reclaimed or recycled water systems. Reclaimed water is treated wastewater that is reused for various purposes, such as irrigation, industrial processes, and toilet flushing. The use of purple for these lines is intended to prevent cross-connection with potable (drinkable) water systems and to alert the public that the water being transported is not safe for drinking. It's an important safety feature that helps promote responsible water use while minimizing the risk of contamination. The other colors mentioned in the options have specific meanings as well: green is commonly associated with irrigation water, blue typically represents potable water, and red usually signifies fire protection water lines. By using purple specifically for reclaimed water, clear visual communication is established regarding the type of water being used in a given pipeline, facilitating both safety and awareness in water management practices.