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Back-Flow Valve: What Is It And Why Your LA Home Needs One

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    Your pipes have to handle a great deal of wastewater on any given day — and a rainstorm is frequently all that it takes to push them over the edge. The post Back-Flow Valve: What Is It And Why Your LA Home Needs One appeared first on Twin Home Experts.

    First of all, what is the main drain?

    What does a back-flow valve do?