Drain cleaning involves removing clogs from the individual drains in your home which typically includes the kitchen and bathroom sinks, washing machines, showers, and toilets. These drains typically get clogged when you have stuff going down them that you shouldn’t allow down the drain. All these drains flow downhill from your house until they reach the lateral line, which is the path out to the public sewer. Sewer cleaning involves unclogging sewer lines, which is where all drains join to dispose of waste into the public sewer system. If you have a clogged sewer line, it affects all your drains.