IPS SDR Series product line, Vinylplex, Inc. 1.5" - 12" IPS pipe produced to the following (Standard Dimension Ratio) Pressure Rating SDR 26 160 psi SDR 21 200 psi SDR 17 250 psi SDR 13.5 315 psi Vinylplex, Inc. is proud to inform you that this product line is manufactured and/or tested to the following: ASTM D 2241, PVC Pressure-Rated Pipe (SDR Series) Tested and Certified by NSF International to NSF/ANSI Standard No. 14 Tested and Certified by NSF International to NSF/ANSI Standard No. 61 PVC Material Type 1, Grade 1 (12454-B), designated as PVC 1120 Standard laying lengths: 20' and 44' Rieber type gaskets (push on joint): Conform to ASTM F 477, Elastomeric Seals for Joining Plastic Pipe ASTM D 2472, Joints for IPS PVC Pipe Using Solvent Cement Vinylplex, Inc. takes great care to manufacture its products to every aspect of referenced industry standards in order to ensure the highest of quality for your piping applications.