What are different types of drains?

Different types of drains include, cast iron, pvc, galvanized, copper and steel. Furthermore, drains include, down pipes for storm water and sewer, sewer drainage pipes under the ground, gulleys (an opening in the ground where sewer collects, example, where the waste water from a bath or kitchen empties into), A drain is pretty much anything that transports waste water (sewerage) and storm water from one place and then eventually ending up either in a river (only storm water) or municipal waste water pipes which is carried then to the waste water treatment plant. Drains convey Acid waste , storm, sanitary, soil, FOG, slurry.