PVC Schedule 40 pipe is manufactured from a Type I, Grade I Polyvinyl Chloride (PVC) compound with a Cell Classification of 12454 per ASTM D1784. The pipe is manufactured in strict compliance to ASTM D1785 and D2665 (where applicable), consistently meeting and/or exceeding the Quality Assurance test requirements of these standards with regard to material, workmanship, burst pressure, flattening, and extrusion quality. Manufactured in the USA, using domestic materials, by an ISO 9001 certified manufacturer. Carries the National Sanitation Foundation (NSF) seal of approval for potable water applications.