Many inventors discover things by accident -- like electricity and post-it notes. The Carey Brothers are no exception. Recently we made a discovery by chance that could save you hundreds of dollars -- if you're making the common repair described below. Often the entire showerhead gooseneck pipe in a tiled bath comes loose; getting it fixed could easily cost $300 to $400. During a recent kitchen remodel, we were using an expanding foam sealant in walls to control air infiltration. We noticed that it dried rock-hard, which got us to thinking. Our customer also had a loose gooseneck pipe in a shower stall which was next on our list to fix. In an explosive blast of brilliance, we tried spraying foam sealant into the wall and watched it lock the gooseneck pipe in place -- rock-solid, right before our eyes. Today many years later it's still there -- solid as the Rock of Gibraltar, spraying away. Try it. And that's the On The House tip for today.