The Febco 765 is an industry leader in the backflow preventer market. Most commonly used, but not limited to protection in lawn irrigation purposes, the Pressure Vacuum Breaker is designed to be installed to provide protection against back siphonage of toxic or non-toxic liquids. The 765 is constructed with a check valve and an air opening port all enclosed in a durable bronze body. The device is testable and shall be tested in compliance with your local code.