Plumbing & Drainage Calculators
Drainage fixture units (DFU), sanitary drain pipe sizing, soil stacks, building drains, and venting calculators.
Sizing Sanitary Drainage Lines by Fixture Units
Gravity drainage requires converting fixture discharge into cumulative units. Sizing horizontal branches, vertical soil stacks, and building drains is governed by IPC Chapter 7 (Table 710.1) and UPC Chapter 7 (Table 703.2).
Potable Water Supply & Velocity Control
Sizing potable water mains and distribution branches requires converting fixture units to peak design flow (GPM) via Hunter's Curve and maintaining velocity under 8.0 FPS.
Available Calculators in Suite
2 active toolsPlumbing DFU & Drainage Pipe Sizing Calculator
Calculate total drainage fixture units (DFU) and size horizontal branch drains, vertical soil stacks, and building drains/sewers per IPC and UPC standards.
Water Supply Fixture Unit (WSFU) & Potable Pipe Sizing Calculator
Calculate total water supply fixture units (WSFU), peak flow (GPM) via Hunter's Curve, and size copper, PEX, and CPVC main supply trunks and branches per IPC and UPC.