Maybe your long, hot shower isn't as long—or as hot—as it used to be. Maybe you've just installed a dishwasher. Or maybe your family has expanded and you're taking more baths and washing more clothes than ever before.

It may be time to replace or upgrade your water heater. A moderately skilled homeowner should be able to complete this project in a few hours, but it's best to have a helper for moving the water heater.