I called my insurance office…Allstate… and they said inside my house is covered but not outside service lines from house to street.
 
RESPONSES:

1)Check your homeowners insurance—these items may be covered.
 
2) I have the protection and just used it.  They did a great job and the repair would have cost me several thousand dollars. The insurance costs about $20 per month extra.  So if you pay for 10 years you spend about $2400 and one repair could easily exceed that.
We have the all the services you listed below except the water line, I didn’t take that one because we have a copper line.

3) Sometimes the utility line insurance is covered by your homeowners insurance, depending on your policy. When I was looking into this, I do remember some horror stories about people not being covered for their utility lines, and if there is a pipe break between your house and the main line, the homeowner is responsible. It can be quite costly to fix. So, if you don't have it covered by your homeowners insurance, it may be wise to get it. That said, there are endless things you could insure! I have opted not to go with the similar electrical line insurance, which replaces damages for what happens between the home and the house. There's less downside risk because it doesn't require digging into the ground.

4) So I have water and sewer protection through my home insurance - Erie - but am not sure if it covers gas lines.  

5) I was going to buy some of that but then found out that my homeowner’s insurance covers broken pipes.    I have Erie insurance. 

6) My understanding is that these programs often offer very little protection relative to their cost.  There was a bit of a scandal with PWSA's program a few years back, for example: https://www.post-gazette.com/business/businessnews/2011/03/19/PWSA-pulls-plug-on-line-warranty-program/stories/201103190132
Typically it's a third party insurer that has a deal with the utility to sell their product using the utility's branding (on mailers that look like official mail rather than advertisements, or as part of their customer service scripts, for eg).  That may be why the utility co.'s meter checker was trying to sell you insurance.
Not that you shouldn't consider this type of insurance if you need it, but consider talking to your homeowner's insurance agent and getting a few competing quotes first.