6-Pack Vacuum Breakers, 3/4'' Anti Siphon Valve Outside Faucet, 3/4 Inch GHT Hose Bib Backflow Preventer for Outdoor Faucet Garden Hose Camp Chef PG24LTD you don't need to purchase

you don't need to purchase screws from hardware store

Use of them does not imply any affiliation with or endorsement by them

DIY - Choose the location to open the hole according to your own needs

Designed to air conditioning units

6-Pack Vacuum Breakers, 3/4'' Anti Siphon Valve Outside Faucet, 3/4 Inch GHT Hose Bib Backflow Preventer for Outdoor Faucet Garden Hose Camp Chef PG24LTD you don't need to purchasePACKAGE INCLUDES: 3 4 Inch GHT Vacuum Breaker 6, washers 6, tape (About 350" long) 1, plastic box 1. ATTENTION: NOT FOR FINE THREAD ADVANCED FUNCTION: The hose bib vacuum breaker is designed to prevent fluid backflow into potable water systems. With a break off screw for permanent attachment and a drain hole for draining remaining water, the backflow preventer efficiently prevents water from freezing and siphoning. ATTENTION: Reaching a certain water