Thoát nước, Nước thải & Thông hơiCâu 142 / 360
A domestic dishwasher discharge, before it connects to the drainage system, must be protected against backflow by…
a.a backwater valve
b.an air gap (or an approved high loop where permitted) in the drain line
c.a check valve at the pump
d.a deep-seal trap
Giải thích
A dishwasher drain must be protected by an air-gap fitting, or by a high loop where the local code allows, so waste cannot siphon back into the machine. The air gap is the most reliable method and is required by many jurisdictions. This protects the dishwasher and the food washed in it from contamination.
Trích dẫn luật: 2022 California Plumbing Code (CPC) §807.0Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
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