800m4 pressure vacuum breaker prevents the reverse flow of polluted water from entering into the potable water supply due to back siphon age.
Vacuum breaker faucet outdoor.
Remove the old outdoor water faucet sill cock by positioning a pipe wrench at the back of the sill cock and turning the wrench counterclockwise.
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A vacuum breaker is one of several devices designed to prevent water that leaves the faucet from flowing back into the plumbing system.
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An outdoor faucet leaking from a vacuum breaker seldom needs to be replaced nor does one leaking from the spout or handle.
It consists of bronze body construction silicone rubber check valve disc plastic check valve seat stainless steel springs a bonnet with silicone rubber o ring seal a lightweight plastic disc float tee handle or lever handle shutoffs and test cocks for winterization draining.
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Occasionally however a faucet may crack especially if it freezes over.
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Any place where water is supplied for any use other than drinking water needs a vacuum breaker installed.
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Have an assistant use a pipe wrench to hold back the sill cock supply line inside to prevent sections of pipe from unscrewing.
Vacuum breakers do this by preventing backflow and back siphoning from occurring.