Thiết bị & Bình nước nóngCâu 221 / 360
Each fixture supply to a lavatory or water closet is commonly fitted with an angle stop primarily to:
a.prevent backflow
b.arrest water hammer
c.reduce the flow rate
d.allow the fixture to be shut off individually for service
Giải thích
An angle stop (fixture shutoff valve) lets a single fixture be isolated for repair or replacement without shutting off water to the whole building. It is installed on the supply riser to the fixture. This is a convenience and service requirement, not a backflow or flow-control device.
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Câu hỏi liên quan cùng chủ đề
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