Reliable sump check valve for backflow protection Function: Prevents backflow from the discharge line into the sump pit, protecting the pump and helping maintain prime during heavy rainfall or power outages Compatibility and sizes: Fits standard sump discharge piping in common sizes 11/4 in, 11/2 in, 2 in; works with PVC piping and standard fittings with adapters Material and durability: Durable PVC body with a resilient gasket, designed for continuous operation in damp environments Performance: Quicksealing action stops backflow and reduces flood risk with minimal flow resistance Installation: Inline installation with common PVC glue or threaded adapters; suitable for installations or retrofits in residential or light commercial systems Use scenarios: Residential basement sump during heavy rain Commercial crawl space or basement drainage in small to midsize buildings Outdoor drainage or French drains protected from sewer backups during municipal disruptions