I have just had a new frost free sillcock installed. It leaks
intermittantly from where the plastic faucet is joined to the metal
pipe that sticks out from the house. This happens mostly when I use a
garden hose with a sprayer nozzle attached to it and I shut the water
off via the sprayer nozzle. I have had some people tell me that this is
suppose to happen and has something to do with an "anti-backflow"
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