Where Can I Get a Gas Meter?

gas company

Anything introduced into your home gas system should be fully functional and (very) properly installed. An old, used, or even "salvage" gas meter doesn't make that cut. Better to learn how to accurately read your existing (utility company's) meter, then perhaps do due diligence in trials for specific appliances.

Feel free to discuss this with your gas utility, who can advise you as well as anyone, and may have additional measuring approaches, like a "check meter", that might be of interest.

The state of repair and efficiency, or lack thereof, of your major gas appliances, is best left to pros, and your judgment about what's "off", either an older unit that may be ripe for replacement, or a newer unit that may not be working properly.

Then of course, there's "If it ain't broke, don't fix it". Spending some money to ensure adequate service, with winter coming on, is a fairly good investment. If everything is working well, spending much of anything out of curiosity, not so much.

Check with your local gas company. Forget about cheap, you are going to get a new or equivalent to new unit. It's the only kind for sale. And you have to pay a plumber to hook it up. No DIY!