There's a claim circling the internet saying someone can use a Styrofoam cup, like the ones you get from Whataburger or Chick-Fil-A, to protect your outdoor spigot faucets from freezing from ...

Vacuum breakers are built into newer frost-proof water valves. But many older outdoor spigots are equipped with an “add-on” hose connection vacuum breaker (HCVB) instead. If water is spraying ...