If your outdoor faucet looks like our next photo shown below and if needs repair, it is NOT a frost-proof anti-siphon valve, it's a traditional compression valve faucet or spigot. You want to see the leak repairs starting at FAUCET, OUTDOOR HOSE BIBB LEAK REPAIR....
only fire-resistant insulation materials such as preformed foam or fiberglass.• D o not damage the heating cable and power cord or plug. Remove any damaged cables from service immediately.• D o not use any wire or metal clamps to attach the cable to the pipe. Use tape (1/2 inch ...