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VALVE VP - 3857761 to prevent siphoning, anti-siphon check valves frequently have a built-in back pressure valve and check valve. In addition to preventing siphoning, this design also lessens the likelihood of overfeeding and liquid backflow into the main pipe. If an engine, generator, head, or bilge pump is ever below the waterline when the vessel is in any attitude, a properly installed anti-siphon valve, also known as a siphon break, is required.
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Caution: This product may contain substances that the State of California has determined to be harmful, cause birth defects, or adversely affect the reproductive system.