Proco Products is the world’s largest and most respected supplier of expansion joints and Rubber Duckbill check valves. Check valves are commonly used in the water and sewage industry. Rubber check valves are a cost-effective way to control back pressures from sewage treatment plants, outfalls, and tidal operations. All Proco check valves are manufactured completely of barnacle resistant rubber with a top-quality fungicide.

The ProFlex™ check valves are designed to be a “zero maintenance” valve. The simple design allows effluent to force the two opposing rubber lips apart permitting flow, yet quickly closing to prevent the return of tailings or slurries. The ProFlex™ valves provide full port flow while ready for the chance of backflow.

In addition to a dynamic product range, Proco aims to accommodate as many industry standards as possible. One of these certifications is the NSF/ANSI 61 Standard certification on its Rubber EPDM Expansion Joints and ProFlex™ Rubber Check Valve product line. Manufacturers of water treatment and distribution products in North America must comply with NSF/ANSI 61 to minimize potentially adverse effects caused from contaminants leaking into drinking water. This certification verifies that these check valves can safely be used in drinking water systems, thus showing Proco’s commitment to producing products that meet safety and health standards.