DFU Pipe Sizer

About this app

Sizing a drain line and need to know the minimum pipe diameter for your fixture load? DFU Pipe Sizer looks up IPC code tables instantly so you can verify pipe sizes on the job site without flipping through the codebook. Select fixtures from a built-in list or enter DFU values directly. Get the minimum pipe diameter for horizontal branches, building drains, building sewers, drainage stacks, and vent pipes. FIXTURE-BASED SIZING: - Select fixtures from a built-in list (water closets, lavatories, showers, bathtubs, sinks, and more) - Each fixture has its IPC-assigned DFU value - Automatically totals DFU and determines minimum pipe size MANUAL DFU ENTRY: - Enter any DFU value directly - Choose drain type: horizontal branch, building drain, or building sewer - Select pipe slope (1/8, 1/4, or 1/2 in/ft) - Get the minimum pipe diameter instantly STACK SIZING: - Size drainage stacks and vent stacks - Enter total DFU load and number of stories - See required pipe size with utilization percentage DRAIN TYPES SUPPORTED: - Horizontal branch drains - Building drains and building sewers - Drainage stacks (vertical) - Vent stacks and vent sizing KEY FEATURES: - IPC Table 710.1(1) and 710.1(2) built in - Fixture DFU values per IPC Chapter 7 - Pipe sizes from 1-1/4" through 15" - Slope-dependent sizing for horizontal drains - Works completely offline — no account required Built for licensed plumbers, mechanical engineers, and plumbing inspectors.

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1. First observed Oct 2, 2026 · 7:51 PM $4.99