Quote:
Originally Posted by retiredguy123
Some plumbers will omit the expansion tank if there is not an existing one already installed. I think it is a gray area in the code because they will call it a "repair" instead of a replacement. As a homeowner, I would not allow this, and would require the plumber to install a new expansion tank.
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My understanding of the code, is that on a replacement, if a water heater didn't have an expansion tank (prior to being required), and a replacement is installed, an expansion tank would be required. I believe this is similar to any retrofit, whether it's plumbing or electric. Of course I could be wrong
