Model Specifications

• MS-7 Model Specification for Plastic Piping Materials for Ground Source Geothermal Applications 
• MS-8 Model Specification for Polypropylene (PP-R & PP-RCT) Pressure Pipe Systems for Plumbing & Mechanical Applications - revised 2025

Statements

• PPI Statement A - Relative Oxidative Aggressiveness of Chloramines and Free Chlorine Disinfectants on Crosslinked Polyethylene (PEX) Pipes Used in Treated Potable Water -revised 2024
• PPI Statement Y - Taste and Odor of Drinking Water from Plastic Piping Systems
• PPI Statement AA - PFAS Chemicals and Plastic Piping for Portable Water Transport  - revised 2025
• PPI Statement AB - Microplastics and Plastic Piping for Potable Water
• PFAS and Plastic Piping Frequently Asked Questions (FAQs) 

Recommendations

• PPI Recommendation E - Recommendation Against Mixing Hydronic Heating Water with Potable Water in Combined Systems
• PPI Recommendation F - Testing PEX and PE-RT Tubing Systems with Compressed Air or Inert Gas
• PPI Recommendation G - Recommendation Against Using Epoxy Pipe Coatings Within Plumbing Distribution Systems Utilizing Plastic Components
• PPI Recommendation H - Direct Connection of Plastic Piping Materials to Tankless Water Heaters for Domestic Applications - revised 2024
• PPI Recommendation I - Guidance on Restoring Potable Water Piping Systems Post-Urban-Wildland Wildfires
• PPI Recommendation J -  Recommended Hydronic Snow & Ice Melting (SIM) System Performance Level Selections for Residential, Commercial, and Institutional Applications - New 2026

Position Papers

• Installation of CPVC Fittings Within and Under Concrete Slabs
• Installation of PEX Fittings Within and Under Concrete Slabs
• Installation of PE-RT Fittings Within and Under Concrete Slabs

Technical Notes

• TN-14 - Utilizing Plastic Piping in Solar Thermal Heating Systems - revised 2025  
• TN-17 - Crosslinked Polyethylene (PEX) Pipe & Tubing Systems
• TN-26 - Erosion Study on Brass Insert Fittings Used in Crosslinked Polyethylene (PEX) Piping Systems- revised 2026
• TN-28 - Guide to Differences in Pressure Rating PE Water Pipe Using the ASTM/PPI and ISO Methods
• TN-31 - Differences Between PEX and PB Piping Systems for Potable Water Plumbing Applications
• TN-32 - UV Labeling Guidelines for Crosslinked  Polyethylene (PEX) Tubing and Pipe - revised 2025
• TN-39 - Recommended Practices Regarding Application of Pesticides and Termiticides near PEX Pipes
• TN-46 - Guidance for Field Hydrostatic Testing of High Density Polyethylene Pressure Pipelines
• TN-52 - Guide to High-Temperature Applications of Non-Potable PEX Pipe and Tubing Systems - revised 2024
• TN-53 - Guide to Chlorine Resistance Ratings of PEX Pipes and Tubing for Potable Water Applications - revised 2025
• TN-55 - Plastic Piping Materials for Ground Source Geothermal Heating and Cooling Applications - revised 2024
• TN-56 - Installation of Plastic Pressure Piping Materials Near IC-Rated and Non-IC-Rated Recessed Lighting Fixtures - revised 2025
• TN-57 - Proper Integration of PP-R Piping Materials with Copper Tubing and Components for Plumbing Applications - revised 2025
• TN-62 - Suitability and Fitness of Chlorinated Polyvinyl Chloride (CPVC) Piping Systems for Commercial Building Applications - revised 2026 
• TN-65 - Insulation Recommendations for Plastic Pressure Piping Materials in Residential Applications
• TN-67 - Chlorine Dioxide and Plastic Hot- and Cold-Water Plumbing Distribution Pipes - revised 2024
• TN-69 - Recommendations When Applying Spray Polyurethane Foam Insulation On and Around Plastic Pressure Pipes & Fittings
• TN-71 - Flanges and Flange Adapters for Polypropylene (PP-R and PP-RCT) Piping Systems - new 2024
• TN-72 - Potential Effects of Artificial Lighting on Crosslinked Polyethylene (PEX) Pipe and Tubing and Recommended Installation Practices - new 2024

Technical Reports

• PPI Technical Response to "Metal Accumulation in Representative Plastic Drinking Water Plumbing Systems"
• TR-11 - Resistance of Thermoplastic Piping Materials to Micro- and Macro-Biological Attack
• TR-19 - Chemical Resistance of Plastic Piping Materials
• TR-48 - R-Value and Thermal Conductivity of PEX and PE-RT - revised 2025
• TR-51 - Investigation of Benzene in Drinking Water Following the "Camp Fire" in Paradise, CA
• TR-52 - Resistance of PEX Pipe and Tubing to Breakage When Frozen (Freeze-Break Resistance)
• TR-56 - History of Crosslinked Polyethylene (PEX) Tubing in North America and Timeline of ASTM Standard Specification F876 from 1984 – new 2025
• Fixture Flow Rate Comparison Cross-Linked Polyethylene (PEX) Piping and Copper Tubing
• NAHB-RC Surge Pressure in Plumbing Pipe Materials
• Jana Report 05-1059 - Proposal for the Evaluation of the Chlorine Resistance of UV Exposed PEX Pipe
• Jana Report 09-1190 - Usage and Effects of Chlorine Dioxide on PEX Plumbing and Water Distribution Systems in North America
• Jana Report (2003) - Oxidative Resistance of Sulfone Polymers to Chlorinated Potable Water
• Jana Report - Chlorine Resistance Testing of Cross-Linked PEX Piping Materials