You might get approached (though flyers, ads, door to door) by a “green” company, who can save you tons of money on water or power, while also improving the quality of the system. They have a good pitch and use these currently popular words like “eco”, “natural” or “green” so you think it’s worth going ahead and phone them up.

A representative comes to your house to install a device that will do all the promised services. In reality, what you get is a normal water filter that you don’t need. You just paid hundreds of dollars for something they have bought in bulk for a few dollars apiece and is not saving you a dime.

How to avoid: water purification doesn’t save money and isn’t even necessary in most areas. If you do want to become the eco-friendly house, do your research and only use reputable firms.