If you've ever taken a peek at your water heater installation or talked to a plumber about it, you've probably had someone bring up an expansion tank to you. It may sound like some sort of extraneous add-on feature at first glance, but it's actually a fairly essential part of having the integrity of your plumbing system in your house. Read More: https://www.lockurblock.com/why-your-water-heater-needs-an-expansion-tank