Trade calculators
Quick code-aligned tools for the field and the exam. Always confirm against the adopted code edition and your AHJ.
Pipe slope / drop
Total drop
7.50 in (0.63 ft)
IPC Table 704.1
Drainage Fixture Units (DFU)
Total DFU
16 dfu
IPC Table 709.1 · individual fixture values
Drain size from DFU load (horizontal branch)
Minimum pipe size
4 in
Per IPC Table 710.1(2) — verify against adopted edition
Static pressure loss by elevation
Pressure loss
8.7 psi
0.433 psi per foot of elevation (water)