¾” Lead-free* PEX [Crimp] ECO BRONZE® Coupling Model Number:WAEC440JJ Model Number: WAEC440JJ MADE IN AMERICA. The Water Armor®, ¾” Lead-free* F1807 PEX Coupling made from ECO BRONZE® alloy is ideal for your plumbing project. The coupling configuration is best used for plumbing projects that require three-quarter inch PEX tubing sections to be joined together. The product is used for both commercial and residential plumbing installations. The coupling is composed of two PEX barbed ends for use with PEX tubing and crimp rings. Our Lead-free* ECO BRONZE® and ECO BRASS ® alloy provides outstanding dezincification resistance and is safe to use for potable water applications in all 50 states, including California. We are the preferred plumbing part provider to leading American plumbing supply warehouses.