Cross connection means any physical connection or arrangement between ___ otherwise separate piping system.

Cross connection means any physical connection or arrangement between ___ otherwise separate piping system.

• A. One Piping System
• B. Two Piping Systems
• C. Three Piping Systems
• D. Multiple Piping Systems

Answer: (B)

A cross connection is a linkage that creates a path between two piping systems that should stay separate, so backflow could contaminate the clean water supply. The blank is filled with two piping systems because the definition hinges on a connection between exactly two systems that would normally be kept apart—such as the potable water system and a non-potable or reclaimed water system. If there’s only one system, there isn’t a second system to connect, so no cross connection exists. Saying three or more or multiple systems isn’t the standard framing; the essential idea is the interruption-free link between two distinct systems. Remember, the concern is preventing backflow contamination, often managed with backflow preventers or an air gap at the point of connection.

A cross connection is a linkage that creates a path between two piping systems that should stay separate, so backflow could contaminate the clean water supply. The blank is filled with two piping systems because the definition hinges on a connection between exactly two systems that would normally be kept apart—such as the potable water system and a non-potable or reclaimed water system. If there’s only one system, there isn’t a second system to connect, so no cross connection exists. Saying three or more or multiple systems isn’t the standard framing; the essential idea is the interruption-free link between two distinct systems. Remember, the concern is preventing backflow contamination, often managed with backflow preventers or an air gap at the point of connection.