Replacing outside hose bib

I want to replace the hose bib outside because my water hose is not able to connect to it due to the size + it's in a tight spot as it's right on the brick (bad placement by builder). I bought an elbow extender but the connector on the bib is too large.

I tried using a wrench to twist it off but perhaps I am doing it on the wrong part as it's not budging. You can see from the photos all I was doing was scraping the copper off.

 

It looks like you have half of a vacuum break; the half that is missing is where you would thread the hose on. So you could use that bib if you removed what is left there. They simply thread onto the bib, but the problem is that they have a screw to secure them from being removed, and that screw is designed to break off when tightened so that nobody tampers with the break. If the screw wasn't installed, you would be able to just take it off, but assume you have already tried turning it, so the only thing to do is cut it off without damaging the threads on the bib. As far as replacing the whole thing, there are no threads showing where you have been trying to turn it, so your connection point is inside the house, and may be threaded or soldered.

 

Just watched a video of how to cut off. Do you think Lowes or Home Depot sells a replacement vacuum break that I can just attach to it? That way I can thread the hose on it. Right now as it stands it's useless.

 

Yes, you can buy a vacuum break like that at your local hardware store or big box, and they're good to have, but you can also thread your hose directly onto the bib once you get that piece cut off. Just be careful that you don't cut too deep and mess up the threads.

 

The current one on it is a 1/2 inch, and the stores only sell 3/4 in. So there's other part of a vacuum break I can attach to it.

Seems like my only option is to cut off the vacuum break entriely and replace it.

 

There is only one size for the screw on vacuum breakers. They all fit the standard 3/4" garden hose threads which is used on all sillcock's/spigots. You are very unlikely to find a matching vacuum breaker you can rob parts from to fit your existing. You will have to remove what's left of your old one and install a new one.