A.Master plumber Rex Cauldwell responds: The report was mistaken in advising that defective polypropylene dip tubes should be replaced with copper dip tubes.

For those of us old enough to remember, dip tubes were originally made of glass. Since they had a habit of breaking during transit, the transition to plastic was inevitable. And perhaps it was just as inevitable that they would keep making them cheaper until they failed. Most plastic dip tubes have not had any problems. The only dip tubes with...

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