Pipe Size Guides
Complete guides to different pipe sizes used in plumbing systems. Learn about flow capacity, applications, and use our calculators to determine the right pipe size for your project.
Calculate flow rates, capacity, and sizing for 1/2 inch pipes. Complete guide to 1/2" pipe specifications, applications, and flow capacity for copper, PEX, PVC, and CPVC.
Calculate flow rates, capacity, and sizing for 3/4 inch pipes. Complete guide to 3/4" pipe specifications, applications, and flow capacity for copper, PEX, PVC, and CPVC.
Calculate flow rates, capacity, and sizing for 1 inch pipes. Complete guide to 1" pipe specifications, applications, and flow capacity for copper, PEX, PVC, and CPVC.
Calculate flow rates, capacity, and sizing for 2 inch pipes. Complete guide to 2" pipe specifications for water supply and drainage applications with flow capacity data.
Calculate flow rates and sizing for 3 inch pipes. Complete guide to 3" pipe specifications for drainage, sewer, and waste applications with capacity data.
Calculate flow rates and sizing for 4 inch pipes. Complete guide to 4" pipe specifications for sewer lines, main drains, and septic systems with capacity data.
Understanding Pipe Sizes
Why Size Matters
Pipe size directly affects flow capacity and system performance. Larger pipes can carry more water but cost more and take up more space. Smaller pipes are more economical but may not provide adequate flow for multiple fixtures. Understanding flow rates for each size helps you design efficient plumbing systems that meet code requirements.
Using Our Calculators
Each pipe size guide includes flow capacity data for different materials and direct links to our calculators. Use our Pipe Sizing Calculator to determine the right size based on your fixture count, flow requirements, and pipe length. Our calculators account for material-specific properties and code requirements.