Non-perforated, or solid, pipe is used to transport water but does not allow water, sand or roots to enter from the outside. 4″ Baughman Solid Gold is ideal for burying downspouts to redirect roof and eaves-trough run off water. Direct into a French drain system or bury them on their own. Consider using a 90 degree pop up or catch basin as part of your project. Virgin material (non-recycled) increases longevity and strength. It is the heaviest single-walled drainage pipe in the world.