Drainage Industries 1-1/2 In. ABS Thermoplastic In-Line Sump Pump Check Valve is a reliable component designed specifically for sump pump systems. Crafted from durable sonic welded ABS, this check valve exceptional longevity and resistance to wear and tear. It features a full-flow design paired with a rubber flapper that ensures a positive seal, effectively preventing backflow and promoting efficient water flow. The valve is equipped with rubber coupling sleeves and stainless steel clamps, making it compatible with both PVC and ABS discharge pipes. This essential sump pump part helps maintain proper drainage and protects your pump by preventing water from flowing back. Model Number: CV01.5IN