Drainage

IPC Drainage Sizing Table (Table 710.1)

IPC Table 710.1 maximum DFU loading and maximum length for drainage piping.

Introduction

IPC Table 710.1 specifies the maximum Drainage Fixture Units (DFU) and maximum developed length for each pipe size, separated for vertical and horizontal installations.

IPC Table 710.1 - Maximum Unit Loading and Maximum Length

Pipe Size (in)	Max DFU (Vertical)	Max DFU (Horizontal)	Max Length (ft)
1-1/4	1	1	45
1-1/2	2	1	65
2	6	3	85
3	24	20	212
4	70	36	300
5	180	110	390
6	384	240	510
8	960	640	750
10	2100	1400	1050
12	3600	2400	1350

Notes

• Slope: 1/4" per foot for pipes <3", 1/8" per foot for pipes >=3".
• Vertical pipes can carry more DFU than horizontal pipes of the same size.
• Maximum length limits ensure self-cleaning velocity is maintained.
• Plumbing Booster uses this table automatically for IPC drainage sizing.

Sanitary Drainage Design Guide

Sanitary drainage system design involves sizing waste pipes using Drainage Fixture Units (DFU), selecting appropriate slopes, and ensuring venting adequacy.

Drainage Pipe Sizing Reference

Complete reference for drainage pipe sizing using IPC Table 710.1 and UPC Table 703.2, including slope requirements and maximum length limitations.