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SPECIAL ORDER ITEM. Review Returns Policy before purchase. Engineered for Figure 7080 drainage systems, this check valve assembly manages flow and prevents backflow in plumbing infrastructure. The component features a 4 in inlet diameter to accommodate standard drainage piping requirements. Designed for specific integration with check valve configurations, the unit includes a 3/4 in water connection size for precise outlet drainage. This assembly serves as a critical component for maintaining sanitary conditions within a building drainage network by controlling wastewater movement and protecting against backflow events.