An toànCâu 342 / 360
After installing a reduced-pressure backflow assembly on a commercial water service, what ongoing requirement protects the public water supply?
a.It must be tested at least annually by a certified backflow tester
b.It never needs testing once installed
c.It only needs testing if the building changes owners
d.It should be removed after one year
Giải thích
Testable backflow prevention assemblies such as RP and double-check assemblies must be tested upon installation and at least annually by a certified backflow prevention assembly tester, because internal check valves and relief valves wear and can fail silently. Annual testing verifies the assembly still protects the potable supply. Local water agencies enforce and track these tests.
Trích dẫn luật: California Plumbing Code §603Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
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