What type of shutoff valves are typically required on either side of a testable backflow preventer assembly?

What type of shutoff valves are typically

Multiple choice — select the best answer

AGate valves
BFull-port ball valves or resilient-seated gate valves
CGlobe valves
DButterfly valves

✓ Correct answer: B. Full-port ball valves or resilient-seated gate valves Full-port ball valves or resilient-seated gate valves are required as shutoff valves flanking testable backflow preventers because they allow full, unobstructed flow and can be fully closed for isolation and testing.

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Topic: Assembly Types

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What type of shutoff valves are typically required on either side of a testable backflow preventer assembly?

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