Dear Plumber:

Please excuse this interruption, but I am bringing to your attention an opportunity to easily make extra money (or a lot of money, depending on how much effort you want to put into it) by “upselling” when doing a residential job.

This is a “natural” for plumbers, especially if a homeowner or renter drinks contaminated bottled water, because the product is the highest rated drinking water filtering system available, and at a low price relative…