Rainwater Harvesting Technical Charts & Guides Determining Total Dynamic Head Size of Gutters Sizing Roof Drains Pipe Specifications Pipe Volume Pipe Inner Diameter Friction Loss Fiction Loss as Equivalent to Pipe Length Sizing of Horizontal Piping C2 Sizing of Horizontal Piping C3 Conversion Factors Reducing Mixing Effects Tank Sizing Rainwater Research Rainwater Quality & Safety Guidance of Use on Rainwater Tanks Rainwater Tank Guidelines Rainwater Tanks A Guide to Keeping Your Tank Safe