Drainage Sizing - IPC 2024

Drainage Pipe Sizing helps you calculate drain, waste, and vent (DWV) piping systems per IPC 2024 and UPC standards for professionals sizing residential and commercial systems. Instantly determine correct pipe diameter for horizontal branches, building drains, and vertical stacks with DFU-based calculations. Works for residential and commercial drainage systems, completely offline on the job site. Reduce sizing errors, accelerate installations, and ensure full code compliance.

FEATURES
• 3 Drainage System Modes: Size horizontal branches, building drains, or vertical stacks independently
• DFU-Based Sizing: Input total Drainage Fixture Units and pipe type to calculate required diameter
• 11 Pipe Diameters: Support from 1.25 inches through 12 inches for all drainage applications
• 3 Slope Options: Select 1/8, 1/4, or 1/2 inch per foot slopes per IPC minimum requirements
• IPC 2024 Table 710.1(2): Complete DFU capacity tables for all pipe sizes and slopes
• Pipe Material Support: PVC, cast iron, copper, galvanized steel, and other approved materials
• Capacity Verification: Check if selected pipe size can handle calculated DFU load

HOW IT WORKS
1. Select pipe type (horizontal branch, building drain, or vertical stack)
2. Enter total drainage fixture units (DFU) from fixture unit calculator
3. Choose pipe slope (1/8, 1/4, or 1/2 inch per foot)
4. See recommended pipe diameters with IPC 2024 DFU capacity
5. Export sizing chart to PDF for code inspection and permit documentation

PERFECT FOR
• Plumbers and drainage contractors installing new systems
• Journeyman plumbers and apprentices studying DWV design
• Plumbing inspectors verifying system compliance
• Mechanical estimators calculating material requirements
• Building code officials conducting plan reviews
• Plumbing contractors and master plumbers

OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
• Unlimited saved calculation history
• PDF export of results
• Dark theme
• Ad-free experience

STANDARDS & COMPLIANCE
IPC 2024 Table 710.1(2) - Drainage Fixture Unit Values and Capacity Tables, UPC (Uniform Plumbing Code) drainage requirements, IPC Section 703 General Drainage Requirements, IPC Section 704 Horizontal Piping, IPC Section 705 Vertical Piping. Fully compliant with 2024 International Plumbing Code drainage system standards.

PERFECT FOR
• Professional plumbers and drainage contractors
• Journeyman plumbers and apprentices
• Plumbing inspectors and code officials
• Building contractors and estimators
• Mechanical engineering firms
• Plumbing educators and students

OFFLINE & PRIVACY
• Works 100% offline - no internet needed on job sites
• No account required - immediate access without signup
• No data collection - your drainage designs stay private
• All calculations stored locally on your device

Part of PlumbTools Suite - professional plumbing calculators and code reference tools. Size drainage systems faster, eliminate errors, and ensure full IPC 2024 compliance with accurate DWV calculations.