When it wears out and begins to leak, you simply remove it and screw on a new one. Turn off the outdoor faucet, or hose bibb, that has the vacuum breaker that you want to replace. Unscrew the hose and remove it. Turn the vacuum breaker counterclockwise to unscrew it from the faucet spout.
A hose bib vacuum breaker (HVB) is a small, but essential part of the standard garden hose. It secures the hose bib, or faucet, onto the hose itself and it is .
A hose connection vacuum breaker should be installed on each faucet or hose bibb that is connected to the potable water supply to prevent backflow into the water supply.