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The 3/8" Watts #7 Series Dual Check Valves prevent the reverse flow of polluted water from entering into the potable water supply due to backpressure backflow. It consists of bronze body construction with internal rubber components and is designed for continuous or intermittent pressure applications. Commonly found on residential incoming water lines. These repair parts fit the older "leaded" versions of the #7 and do NOT fit Lead Free, LF7 models. There are no repair parts for the LF7 models.
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