I need to replace the pressure tank to our water filter. Having a waterlogged tank isn’t unusual. That’s a fairly common problem with an older unit. But what is notable is the huge price difference between the supply store that carries what I want and online. Retail stores have more expenses, so I expected it to be more expensive. But it was more than twice as much! In fact, it was two-and-a-half times as much after taxes. I like to support local business; but not if it means paying $100 for a $40 item. I wonder how they stay in business. I know I was starting the shopping app on my Droid as soon as I got off the phone.