"The only way a backwater valve is ever used is if the city sewer is plugged or backs up," Chandler said. "The only thing a backwater valve is going to do is it's going to force the water to the next ...
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Clean Checkâ„¢ valves prevent sewage backup into a residence or building as a result of a plugged sewer system, excess volume in the system or groundwater flooding. They are designed to be installed ...