You don’t have to be a plumber in Alexandria, Va., to keep your pipes flowing smoothly. If you’re a die-hard DIYer, here’s what you need to know about rootering a main drain. First, make sure the problem truly is the main pipe. Clogs typically occur in smaller pipes close to the drain because of the simple fact that they’re narrower and more easily blocked. Before you undertake the task of rootering a main pipe, make sure the blockage isn’t easier to remove than you think. Try plunging, snaking and some good old-fashioned hot water to see if that helps eliminate the problem.