Thiết bị & Bình nước nóngCâu 220 / 360
An outdoor hose bibb (sillcock) must be protected against backflow by:
a.an expansion tank
b.a pressure-reducing valve
c.an atmospheric or listed hose-connection vacuum breaker
d.a check valve on the water heater
Giải thích
A hose bibb can create a cross-connection when a hose is submerged in contaminated water, so it must have a hose-connection vacuum breaker (or be a listed anti-siphon type). This device admits air to break any back-siphonage. It protects the potable supply from garden or utility contaminants.
Trích dẫn luật: 2022 California Plumbing Code (CPC) §603.5.7Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- The temperature-sensing element of a water heater T&P relief valve must be located so that it senses:
- A thermal expansion tank installed on a water heater system must be:
- Water hammer arrestors are installed on a water distribution system primarily to:
- Each fixture supply to a lavatory or water closet is commonly fitted with an angle stop primarily to:
- A water heater installed in an attic must be reached by a passageway and working platform. A typical minimum requirement is a solid, continuous passageway not less than:
- Cross-connection control in a potable water system is intended to:
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