✔ In Stock – Fast Shipping from Multiple U.S. Warehouses✔ Contractor-Grade – Built for Commercial & Mechanical Systems✔ Trusted by Plumbers & Contractors NationwideHigh Demand Item – Frequently Reordered by ContractorsThe Legend S-640 Flapper & O-Ring is a backwater valve designed for commercial, industrial, and mechanical plumbing applications.Available in multiple sizes. Connection: N/A.✔ In Stock – Ready to Ship✔ Bulk Pricing Available✔ Fast Shipping from Multiple U.S. Warehouses✔ Built for Contractors, Not DIY Applications Commercial plumbing systems Industrial piping and mechanical systems Residential plumbing installations Contractor and jobsite use Why Contractors Choose This Product Designed and rated for commercial and industrial use — not consumer-grade Available in multiple sizes to fit standard piping systems Consistent performance across high-volume installations Backed by Legend Valve — a trusted name in the trades Frequently Asked Questions What is the Legend S-640 Flapper & O-Ring used for? The Legend S-640 Flapper & O-Ring is a backwater valve designed for commercial, industrial, and mechanical plumbing applications. Is bulk pricing available? Yes — contact us for contractor and volume pricing on orders of 12 or more units. How fast does this ship? We ship from multiple U.S. warehouses. Most orders ship same or next business day.
