Technical Guides Technical Guides Waterworks PVC Pipe vs Ductile Iron Why Choose PVC PVC Pressure Pipe Tapping Guide UV Exposure Gasketed Pipe Expansion Gaps Ground Movement External Load Calculator Axial Joint Deflection Installation Pressure & Gravity Pipes For more information or questions please refer to Unibell PVC Pipe Association technical briefs. Plumbing & Irrigation Proven Solution for Waters Infrastructure For more information or questions please refer to PPFA website.