Before you buy expensive equipment, check the obvious: run the water for a minute. Sometimes the sulfur smell only shows up after the water sits in the pipes for a while. If you flush the line for 30 seconds, the smell disappears. That’s not a real problem—that’s just your pipes being lazy.
Also, check your water softener. A failing softener can create a perfect breeding ground for sulfur bacteria. Clean the brine tank and make sure it’s cycling properly. It’s like cleaning out your swimming pool—no one wants to swim in a slimy green mess.