Of course you may use the image and idea. I have learned so much from you and Larry, and many other contributors. I consider it a start at repaying the community here for sharing such a wealth of knowledge and common sense tips.
This web site has surely saved many thousands of dollars for your readers who have either fixed a problem themselves, repaired rather than replaced their water heater, or made a more informed decision in their search for a water heater.
I have sent higher resolution images to you via email.