The Febco 765 backflow device is available in a variety of sizes at Sprinkler Warehouse. These sizes include the popular 1 inch FPT, the 1-inch union end ball valves, the 1-1/4 inch FPT, and the 1/2 inch FPT backflow preventers. Sprinkler Warehouse makes shopping faster and easier than ever with our online free shipping deals and limited-time promo codes.