A place for Plumbers and those interested in Plumbing to ask questions and discuss the trade.
Community guidelines:
If you have a plumbing question please include a picture in your post.
If you have a question such as "does this look correct?" please include the code your area adheres to. If you're not sure please include state/province/country you're in. Codes can vary state to state and what's wrong in one area may be perfectly acceptable in another.
Just as codes vary, prices do too. That's why we won't discuss any pricing because there's so many factors that can't or shouldn't be conveyed to strangers over the internet.
The nut broke off and had a small red ring/gasket between these connectors. I'm an noob but can follow instructions. Please give suggestions. Thanks
Below there is a water valve 
which may be used as an alternative if the above (cupper?) pipe is inconvenient to use.
You should not use a hacksaw to cut copper pipe for a sharkbite fitting, because supposedly the main thing that causes those to fail is the rubber o ring being damaged from rough edges. It's worth paying the $20 for a pipe cutter to not have to worry about a leak.