Plumbing
Calculators.

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Size your water heater by household demand

Calculate pipe diameter for water supply or drainage

Diagnose water pressure and calculate friction losses

Size your septic tank and drain field by bedrooms

Calculate french drain materials and pipe sizing

Calculate total drainage fixture units (DFU) and water supply fixture units (WSFU) to size drain stacks and supply pipes per IPC/UPC code

Calculate drain pipe slope in inches per foot, check IPC/UPC code compliance, and compare flow velocity for 2–6 inch pipes

PlumbingCalculators.