What is the physical connection, direct or indirect, which provides the opportunity for nonpotable water to enter a conduit, pipe or receptacle containing potable water?

What is the physical connection, direct or indirect, which provides the opportunity for nonpotable water to enter a conduit, pipe or receptacle containing potable water?

• A. Cross connection
• B. Well Testing
• C. Pump injection
• D. Bell Joint Clamp

Answer: (A)

Cross connections are physical links between a potable water system and a nonpotable source that could allow contaminants to flow into the clean supply. The description “direct or indirect” fits exactly, since a cross-connection can be a direct pipe tie or an indirect linkage through shared components. When pressure changes occur—backpressure or backsiphonage—a contaminant from the nonpotable side can be drawn into the potable system through that connection. That’s why this concept is the one the question is probing. The other terms don’t describe a pathway between potable and nonpotable water: well testing is just evaluating a well, pump injection is a process, and a bell joint clamp is simply a pipe fitting.

Cross connections are physical links between a potable water system and a nonpotable source that could allow contaminants to flow into the clean supply. The description “direct or indirect” fits exactly, since a cross-connection can be a direct pipe tie or an indirect linkage through shared components. When pressure changes occur—backpressure or backsiphonage—a contaminant from the nonpotable side can be drawn into the potable system through that connection. That’s why this concept is the one the question is probing. The other terms don’t describe a pathway between potable and nonpotable water: well testing is just evaluating a well, pump injection is a process, and a bell joint clamp is simply a pipe fitting.