While doing a Phoenix area home inspection for a homebuyer we came across this gas company Red Tag dated a year prior regarding a gas leak at the water heater. If the tag is still in place a year later, it has to be assumed that a potential problem still exists. Time for the buyer or agent to call the gas company to get more information.
This should have been fixed by a plumber, the gas company should be notified to re-evaluate and the tag should have been removed if all was well. Be careful out there, gas leaks are a very serious matter. Don’t buy a house with a tag like this on your gas system until confirming it is fully repaired.