Plumbing Code Compliance Analyzer
Analyze plumbing designs against IPC codes and specs to catch compliance gaps early
What You Can Do
You can submit plumbing designs—including fixture counts, pipe sizing, drainage loads, and system layouts—and receive a detailed compliance audit against IPC standards, local code amendments, and manufacturer specifications. The skill analyzes pressure piping, drainage/vent systems, and fixture performance to flag violations, calculate required corrections, and provide actionable recommendations. This accelerates design review cycles by 60-70% and eliminates costly RFI loops during construction.
Features
ensures drainage system sizing meets code requirements
confirms water pressure, velocity, and sizing compliance across supply lines
validates proper venting, trap seals, and drainage line slopes
identifies required device types, placement, and testing protocols by application
verifies water heater sizing, recirculation requirements, and temperature maintenance
checks ADA and ANSI A117.1 compliance for clearances, grab bars, and universal design
adapts analysis to jurisdiction-specific amendments and amendments on file
cross-references tankless heaters, pumps, grinders, and specialty equipment against project requirements
Example Output
Example 1: Fixture Count & DFU Analysis
Input: 3-story office building, 180 occupants, 24 water closets, 12 lavatories, 6 urinals, 4 sinks
Output:
- ✓ Water closet count: 24 fixtures meets 1:8 ratio (required: 23 min)
- ✗ Urinal count: 6 fixtures exceeds allowance by 2 (code allows 4 max as WC substitutes)
- DFU load: 156 DFU (drainage); 78 DFU (vent)
- ✓ Main drain: 4" pipe adequate for load
- Recommendation: Remove 2 urinals or upgrade vent line to 3"
Example 2: Water Supply Pressure & Velocity Compliance
Input: 5-story residential, 60 psi inlet pressure, 3/4" main line, 50 fixtures
Output:
- ✓ Inlet pressure: 60 psi within code range (20–80 psi)
- ✓ Velocity: 5.2 fps in main line (code limit: ≤6 fps)
- ✗ Second-floor branch: 9.1 fps exceeds code maximum
- Pressure loss: 18 psi across distribution (acceptable)
- Recommendation: Upgrade 1/2" second-floor line to 3/4"
Example 3: Backflow Prevention Audit
Input: Mixed-use building with irrigation, lab fixtures, pool
Output:
- ✓ Irrigation: RP (Reduced Pressure) device required at zone inlet
- ✗ Lab fixtures: Missing backflow protection (requires DCVA for potable draw)
- ✓ Pool: Check valve acceptable; approved device list verified
- Testing schedule: Annual RP device testing documented
- Recommendation: Add DCVA device upstream of lab; schedule Q1 testing cycle
What's Included
- SKILL.md instruction file with compliance framework and analysis methodology:
- IPC Code Reference Checklist (2024 edition) covering pressure piping, drainage/vent, and fixture requirements:
- Fixture Count & DFU Calculation Template with occupancy load tables and unit counts by building type:
- Backflow Prevention Device Matrix mapping application types to required device classifications and testing intervals:
- Local Code Amendment Tracker: framework to document jurisdiction-specific modifications and apply to designs
Who It's For
- MEP Engineers & Plumbing Designers — streamline code compliance reviews and reduce RFI cycles during design phases
- Project Managers & Estimators — quickly assess design feasibility and identify scope changes before permitting
- Code Officials & Inspectors — document compliance rationale and validate submitted designs against multi-layer code requirements
- Plumbing Contractors — validate plans before construction to avoid costly field modifications and permit holdups
- Architectural Firms — ensure plumbing coordination meets code standards during schematic and design development
Best For
- Preliminary design compliance reviews before permitting submission
- Fixture count validation and DFU/load calculations for drainage systems
- Water supply pipe sizing and pressure/velocity verification across multi-story buildings
- Backflow prevention device specification and placement by application type
- RFI response documentation with code citations and corrective design sketches
- Hot water system sizing, recirculation, and accessibility compliance audits
- Local amendment integration for jurisdiction-specific code variations
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