A backflow risk occurs when a bib tap is fitted with a

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Study for the Plumbing Level 2 Cold Water Systems Test. Enhance your knowledge with flashcards and multiple choice questions for each module. Prepare to succeed in your exam!

Multiple Choice

A backflow risk occurs when a bib tap is fitted with a

Explanation:
Backflow risk happens when water in the supply could be drawn back into the potable system through a path that connects to a source of contamination. A hose union on a bib tap creates that kind of path because it allows a hose to be attached. If the end of the hose is placed into a bucket, drain, or any contaminated source, or if pressure in the supply drops, water can be siphoned back into the pipe system. The other fittings—compression, elbow, and tee—are just pipe connections inside the fixed plumbing and don’t by themselves provide a direct external hose path that could enable backflow. That’s why the hose union is the one that introduces the backflow risk.

Backflow risk happens when water in the supply could be drawn back into the potable system through a path that connects to a source of contamination. A hose union on a bib tap creates that kind of path because it allows a hose to be attached. If the end of the hose is placed into a bucket, drain, or any contaminated source, or if pressure in the supply drops, water can be siphoned back into the pipe system. The other fittings—compression, elbow, and tee—are just pipe connections inside the fixed plumbing and don’t by themselves provide a direct external hose path that could enable backflow. That’s why the hose union is the one that introduces the backflow risk.

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