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&lt;/script&gt;</html><thumbnail_url>https://www.china-yfm.com/wp-content/uploads/2025/03/backflow-preventer.webp</thumbnail_url><thumbnail_width>824</thumbnail_width><thumbnail_height>486</thumbnail_height><description>Understand the crucial differences between backflow preventers and SS check valves. While backflow preventers offer multiple layers of protection for potable water safety with required testing, check valves provide simpler, more economical reverse flow prevention for general applications. Learn which device best suits your specific plumbing needs based on safety requirements and local codes.</description></oembed>
