I'm in a newly purchased house built 1998. It has three outside hose bibbs, two are standard garden hose thread but one has a very fine thread that does not match either "Hose" or "Pipe" thread. I looked at Home Depot and they have all sorts of adapters for various types of threads, but nothing matching this.
Here's a picture showing the hose bibb next to a standard hose thread.
What is this thread, and what kind of adapter do I need?
What you see there is a vacuum breaker spigot with its pants down. You'll need to try and procure the parts or just replace the whole works.
it looks like a 3/4 national pipe thread(npt) ...most hardware stores have a conversion coupling to get to male hose thread (mpt)..ask for a 3/4 female iron pipe to male hose adaptor ...some of the hose bibs out there have decorative spout features that change the thread. hose bib vacumn breakers are usually the same thread fht x mht they can be added after market to a hose bib unless it came from factory pre installed they are usually permanently affixed.
