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The plumber can check if there are fixable issues with the switch, check valve, and drainage pipe.—Brandee Gruener, Southern Living, 17 Oct. 2025 Install check valves to prevent floodwater from backing up your home's drains.—Maria Sabella, Better Homes & Gardens, 7 Aug. 2024 The air is pushed through the check valve, compressing everything down as much as possible.—Lydia Mansel, Travel + Leisure, 17 July 2024 But since the water is moving into a closed valve, it is redirected up past the other check valve, B, and causes the air space to be compressed.—WIRED, 24 Mar. 2023 See All Example Sentences for check valve
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