Hello - My outside faucet is leaking thru the anti-siphon cap on top of the faucet. This occurs when the water is turned and there is no back pressure (ie faucet turned on, hose connected, sprayer on). From everything I've read, this is a common problem either caused by a broken washer/plastic connector under the cap, or a piece of foreign debris that has been lodged inside. My questions are: How do I remove the cap; it just seems to spin round and round? I see no model number of the faucet, so not sure if it's welded or screw threaded. Fix or replace spigot? Thanks for any advice out there!