Yes, one of the most common day-to-day tasks of a plumber is to unblock drains. Plumbers are trained in dealing with a number of different types of drain blockages which can occur in sinks, toilets, showers or even main sewer or storm water drains.  Various types of tools and equipment are used to clear drains depending on the material and size of the drain pipe. Plumbers can use tools such as plungers and augers to clean smaller drains or equipment such as water jets and electric eels to clear or clean larger diameter pipes.  CCTV drain cameras are commonly inserted after the drain has been cleared to inspect the drain to identify the cause and location of the problem inorder to provide a permanent solution.