plumbing vacuum breakerA vacuum breaker is an important plumbing device to protect your water supply. You will commonly find them on your irrigation system and hose bibs to prevent possibly contaminated water from backing up into your potable water. These devices are generically known as anti-siphon, backflow, or pressure vacuum breakers, and they prevent water from the garden hose or sprinkler system from backing up into your home’s water.

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On a hose bib, the device will simply screw onto the end of the faucet. Once they are snug, there is a small screw with a hex head that is tightened against the threads to make sure it won’t move.

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Remove the old device by loosening the screw first, and then unscrewing the device. On the new device, make sure there is a rubber washer seated in place and then gradually start screwing it onto the hose bib. Once it is tight, you can tighten the screw that holds it in place.

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You may find that the old screw has damaged the threads of the hose bib. Once you get the new device on, check to see if it leaks from this area. If it does, you may find yourself replacing the hose bib first, and then you can install the new vacuum breaker onto it.  

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