Drain and Sewer Cleaning - Your plumbing system is composed of many different parts, including water supply lines, drains and sewer pipes. Drain cleaning is the cleaning out of pipes that transport dirty water from your plumbing fixtures and appliances, including sinks, tubs and showers, toilets, the dishwasher, the washing machine, and more. Each drain eventually connects to the main sewer pipe (house lateral), which carries wastewater to the municipal sewer system or a septic tank. Drain cleaning removes debris that leads to clogs, including hair, grease, oil, soap scum, and limescale. Preventive drain cleaning can also be a smart way to prevent clogs before they start.