The 2069 Silent Sump Check Valve (Part Number 4420-465) is engineered for smooth, quiet operation in residential sump pump systems. Designed to fit standard 1-1/2 inch discharge lines, the valve installs easily over PVC (Schedule 40 or 80), steel pipe, or copper tubing using the included rubber couplings and stainless steel clamps. Its one-piece ABS housing eliminates internal gaskets—removing common failure points and reducing leak risks. The valve is built to eliminate the loud “water hammer” noise typically heard after a sump pump cycles, offering quieter operation and improved system performance. Every valve is pressure-tested to ensure reliable, leak-proof functionality right out of the box.