Final answer:
In a pool circulation system, PVC is the most commonly used piping material due to its chemical resistance, long lifespan, and ease of installation. Copper may also be used for its antimicrobial properties, though it is more expensive and requires skilled installation.
Step-by-step explanation:
The type of piping commonly used in a pool circulation system is determined by various factors including durability, safety, and local building codes. For instance, PVC (polyvinyl chloride) pipes are widely used because of their resistance to chemicals and corrosion, making them suitable for the chlorinated water in swimming pools. They also come at a reasonable cost, have a long lifespan, and are relatively easy to install and replace.
In some cases, other materials such as copper may be used for certain portions of a pool's plumbing. This is due to copper's natural antimicrobial properties and its resistance to algae growth within the pipes. Copper pipes can be more expensive and may require a skilled plumber to install due to their rigidity and need for soldering.
PVC and copper are examples of materials that are preferable to others such as lead, which can cause health hazards such as lead poisoning. Quality piping in any circulation system, including that of a pool, is critical in ensuring safe and effective operation. Pool owners should always consult with a professional when considering installation or replacement of pool plumbing to ensure compliance with safety standards and local regulations.