Drainpipe/ˈdreɪnpaɪp/ Definition 1 of 1Pro Tip 1/3Location Specific Drainpipes are usually found on the outside of buildings. Look at the corner of the school; you can see a large drainpipe there. Pro Tip 2/3Maintenance Issues Drainpipes can get blocked and may need fixing or cleaning. After the storm, leaves had blocked the drainpipe, causing an overflow. Pro Tip 3/3Material Types Drainpipes can be made of plastic, metal, or clay. Our new house has durable plastic drainpipes.