1st Floor = grade level (always present). Add floors above or below. Click a floor to expand and add fixtures.
Stack Systems
Create drain/vent stacks and assign fixtures. Each stack sizes independently — drain accumulates down, vent accumulates up. Reorder stacks to set position along the building drain. Unassigned fixtures are individually vented.
Add fixtures to floors first, then create stacks here
Sizing Results
Add fixtures to see results
Stack Diagram
Add fixtures to generate diagram
Text Output
ADD FIXTURES TO GENERATE OUTPUT
This tool is for preliminary sizing guidance only. All drainage system designs must be reviewed and approved by a licensed professional. Green Stories LLC is not a licensed architecture firm. Values are based on NSPC 2021 as adopted by the NJ UCC Plumbing Subcode. Verify all calculations against the applicable code edition and local amendments before use. The designer of record is responsible for final pipe sizing.