Page 688 - 2018_IRC

CHAPTER 30

SANITARY DRAINAGE

User notes:
About this chapter: Chapter 30 regulates methods and piping systems that remove water that has been used for purposes such as flushing
water closets, bathing, culinary activities and equipment discharges. The types of materials, drainage fitting and connection methods for these
systems, beginning at the receiving fixtures and ending at the point of disposal for the liquid waste, are covered. A design method for a gravity
flow system of vertical and horizontal piping is provided based on the probability of flows from specific fixtures.
Code development reminder: Code change proposals to this chapter will be considered by the IRC—Mechanical/Plumbing Code Develop-
ment Committee during the 2018 (Group A) Code Development Cycle. See explanation on page iv.

SECTION P3001 P3001.3 Flood-resistant installation. In flood hazard areas
GENERAL as established by Table R301.2(1), drainage, waste and vent
P3001.1 Scope. The provisions of this chapter shall govern systems shall be located and installed to prevent infiltration
the materials, design, construction and installation of sanitary of floodwaters into the systems and discharges from the sys-
drainage systems. Plumbing materials shall conform to the tems into floodwaters.
requirements of this chapter. The drainage, waste and vent
(DWV) system shall consist of piping for conveying wastes SECTION P3002
from plumbing fixtures, appliances and appurtenances, MATERIALS
including fixture traps; above-grade drainage piping; below-
grade drains within the building, such as a building drain; P3002.1 Piping within buildings. Drain, waste and vent
below- and above-grade venting systems; and piping to the (DWV) piping in buildings shall be as indicated in Tables
public sewer or private septic system. P3002.1(1) and P3002.1(2) except that galvanized wrought-
iron or galvanized steel pipe shall not be used underground
P3001.2 Protection from freezing. Portions of the above- and shall be maintained not less than 6 inches (152 mm)
grade DWV system, other than vent terminals, shall not be above ground. Allowance shall be made for the thermal
located outside of a building, in attics or crawl spaces, con- expansion and contraction of plastic piping.
cealed in outside walls, or in any other place subjected to
freezing temperatures unless adequate provision is made to P3002.2 Building sewer. Building sewer piping shall be as
protect them from freezing by insulation or heat or both, indicated in Table P3002.2. Forced main sewer piping shall
except in localities having a winter design temperature greater conform to one of the standards for ABS plastic pipe, copper
than 32°F (0°C) (ASHRAE 97.5 percent column, winter, see or copper-alloy tubing, PVC plastic pipe or pressure-rated
Chapter 3). pipe indicated in Table P3002.2.

TABLE P3002.1(1)
ABOVE-GROUND DRAINAGE AND VENT PIPE
MATERIAL STANDARD
Acrylonitrile butadiene styrene (ABS) plastic pipe in IPS diameters, including
schedule 40, DR 22 (PS 200) and DR 24 (PS 140); with a solid, cellular core or ASTM D2661; ASTM F628; ASTM F1488; CSA B181.1
composite wall
Cast-iron pipe ASTM A74; ASTM A888; CISPI 301
Copper or copper-alloy pipe ASTM B42; ASTM B43; ASTM B302
ASTM B75/B75M; ASTM B88; ASTM B251;
Copper or copper-alloy tubing (Type K, L, M or DWV)
ASTM B306
Galvanized steel pipe ASTM A53
Polyolefin pipe CSA B181.3
Polyvinyl chloride (PVC) plastic pipe in IPS diameters, including schedule 40,
DR 22 (PS 200) and DR 24 (PS 140); with a solid, cellular core or composite ASTM D2665; ASTM F891; ASTM F1488; CSA B181.2
wall
Polyvinyl chloride (PVC) plastic pipe with a 3.25 inch O.D. and a solid, cellular ASTM D2949; ASTM F1488
core or composite wall
Stainless steel drainage systems, Types 304 and 316L ASME A112.3.1
For SI: 1 inch = 25.4 mm.

2018 INTERNATIONAL RESIDENTIAL CODE ® 663
Copyrighted © 2017 by, or licensed to, ICC (ALL RIGHTS RESERVED); licensed to UL, LLC pursuant to License Agreement with ICC. No further reproductions authorized or distribution authorized.
ANY UNAUTHROIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT; AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.