What Is Plumbing Pipe? 

A plumbing pipe carries clean water, wastewater, or vent air throughout a building. Common materials include copper, PEX, PVC, and cast iron. 

Plumbing systems use specific pipes for different jobs. Supply pipes deliver clean water, drain pipes remove wastewater, and vent pipes manage airflow to block sewer gases.

Materials vary by application. PEX and copper are standard for water supply, while PVC and ABS are typically used for drains. The right pipe always depends on local codes, water pressure, and specific usage.

No. Supply, drain, and vent pipes require entirely different materials. 

PEX and copper are the most common choices for residential water supply.