_:n48e82fd361174eefb4dc14c4f1ddb0e1xb0
<http://schema.org/url>
<https://www.thewaterheatercompany.com/blog/2019/november/how-tank-water-heaters-work/>
<http://thewaterheatercompany.com/blog/2019/november/how-tank-water-heaters-work/index.html>