A line can look large enough and still come up short once distance and downstream appliance load are counted. Build Specs keeps those inputs together and makes the sizing path easy to review in the field.
WHAT IT DOES
Useful detail without the spreadsheet.
01
Quick size
Check a single run by gas type, material, pressure, distance, and connected BTU load.
02
System planner
Build multi-trunk layouts and size each section by its downstream load using the longest-length method.
03
Field-ready references
Work with natural gas or propane and supported black-iron and HOME-FLEX CSST tables, with the source kept visible.
USE IT WHEN
The answer needs to travel with the work.
✓Checking a new appliance branch before material pickup
✓Planning propane or natural-gas distribution through a house
✓Saving a layout so the same assumptions can be reviewed later
