A wet dry shop vac is a common tool in most households. Tim Carter of AsktheBuilder.com shows you the latest advancements in wet dry vacuum technology, and how to choose which wet dry vac is best for your needs. There is the traditional wet dry shop-vac and the upscale model. They both can suck up water from a flood, pick up saw dust or to vacuum up the things you don't want inside your regular vacuum. The traditional shopvac has an on/off switch. The upscale model has up to four switches which include a self cleaning switch and a switch to hook up another piece of equipment. Watch this AsktheBuilder.com video for more details.