SC Plumber Contractor Practice Questions - South Carolina Plumber Contractor Examination Exam

A wall hydrant or hose bibb on a commercial building shall be protected against backflow by which device?

A dual-check valve installed anywhere in the building An atmospheric vacuum breaker or a hose-connection backflow preventer listed for hose-thread outlets An air gap at the curb stop only No protection is required if the hydrant is 6 feet above grade

Correct Answer:

An atmospheric vacuum breaker or a hose-connection backflow preventer listed for hose-thread outlets

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