Which type of pipe is most commonly used for residential irrigation laterals?

PVC pipe is the most commonly used material for residential irrigation laterals due to several key advantages. It is lightweight, durable, and resistant to corrosion, making it an ideal choice for underground installations where exposure to moisture is prevalent. PVC is also relatively inexpensive compared to other materials, which helps to keep costs down for residential projects.

Additionally, PVC has a smooth interior that facilitates efficient water flow with minimal friction loss, enhancing the overall efficiency of the irrigation system. Its flexibility in terms of availability in various diameters helps accommodate different irrigation needs and layouts while being easy to join and install with solvent welds or fittings.

Other materials such as CPVC pipe are generally used for hot-water applications rather than irrigation. Cast iron, while durable, is much heavier and more costly, making it impractical for residential irrigation purposes. Polyethylene pipe, although popular for drip irrigation and certain applications, does not typically provide the same rigidity and structural integrity needed for laterals in residential systems, which often require the enduring characteristics of PVC.