Zurn BFP-9 Hose Bibb Vacuum Breaker Designed for installation on water lines such as service sinks, laundry tubs and hose bibbs to protect against backsiphonage of polluted water into the potable water supply. A breakaway set screw is included to prevent unauthorized removal. Assembly shall provide protection where a potential health hazard does not exist. Standards Compliance<ul style="margin-top:0px; padding-top: 5px; padding-bottom: 5px;"><li>ASSE&#174; Listed 1011</LI><LI>IAPMO&#174; Listed</LI><LI>CSA&#174; Certified B64.2 (BFP-8F)</LI><LI>cUPC&#174; Certified B64.2 (BFP-9) </LI></UL>