Plastics Pipe Institute marks 75 years advancing plastic piping systems
The Plastics Pipe Institute (PPI) is celebrating its 75th anniversary in 2025, marking decades of work promoting the development, performance and acceptance of plastic piping systems across North America and beyond.
Founded in 1950 as the Thermoplastic Pipe Division of the Society of the Plastics Industry, PPI later became an independent nonprofit trade association representing all segments of the plastic pipe industry. Today, the organization supports more than 200 member companies and hundreds of volunteers engaged in technical committees, task groups and standards development.
PPI has played a central role in advancing plastic piping applications for water, wastewater, stormwater, gas distribution, energy, building systems and power and communications infrastructure. A key component of that work is the Hydrostatic Stress Board, which evaluates material performance and establishes pressure ratings to ensure long-term reliability and safety.
Over the years, PPI has expanded its technical and advocacy footprint through five application-focused divisions and increased engagement with regulators, utilities, engineers and policymakers. The association has also strengthened its sustainability and government affairs efforts, emphasizing plastic piping as a durable, low-carbon option for modern infrastructure needs.
PPI marked the milestone during its Semi-Annual Meeting held Oct. 20–23 in Mobile, Alabama. Association leaders said the anniversary reflects both the industry’s evolution and PPI’s ongoing mission to support resilient, efficient infrastructure systems for future generations.
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