Page 644 - 2018_IRC

CHAPTER 26

GENERAL PLUMBING REQUIREMENTS

User notes:
About this chapter: Chapter 26 contains general requirements that could apply to Chapters 26 through 33. Placing such requirements in
only one location eliminates code development coordination issues associated with the same requirement in multiple locations. This chapter
covers liquid waste disposal requirements, special installation provisions for flood hazard areas and requirements for third-party certification of
materials and products that are required to comply with a referenced standard.
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 P2601 drainage piping and systems shall be connected to an approved
GENERAL private sewage disposal system that is in accordance with the
P2601.1 Scope. The provisions of this chapter shall govern International Private Sewage Disposal Code.
the installation of plumbing not specifically covered in other Exception: Sanitary drainage piping and systems that con-
chapters applicable to plumbing systems. The installation of vey only the discharge from bathtubs, showers, lavatories,
plumbing, appliances, equipment and systems not addressed clothes washers and laundry trays shall not be required to
by this code shall comply with the applicable provisions of connect to a public sewer or to a private sewage disposal
the International Plumbing Code. system provided that the piping or systems are connected
P2601.2 Connections to drainage system. Plumbing fixtures, to a system in accordance with Section P2910 or P2911.
drains, appurtenances and appliances used to receive or discharge P2602.2 Flood-resistant installation. In flood hazard areas
liquid wastes or sewage shall be directly connected to the sanitary as established by Table R301.2(1):
drainage system of the building or premises, in accordance with 1. Water supply systems shall be designed and con-
the requirements of this code. This section shall not be construed to structed to prevent infiltration of floodwaters.
prevent indirect waste connections where required by the code.
Exception: Bathtubs, showers, lavatories, clothes washers 2. Pipes for sewage disposal systems shall be designed
and constructed to prevent infiltration of floodwaters
and laundry trays shall not be required to discharge to the into the systems and discharges from the systems into
sanitary drainage system where such fixtures discharge to floodwaters.
systems complying with Sections P2910 and P2911.
P2601.3 Flood hazard areas. In flood hazard areas as estab-
lished by Table R301.2(1), plumbing fixtures, drains, and SECTION P2603
appliances shall be located or installed in accordance with STRUCTURAL AND PIPING PROTECTION
Section R322.1.6. P2603.1 General. In the process of installing or repairing any
part of a plumbing and drainage installation, the finished
floors, walls, ceilings, tile work or any other part of the build-
SECTION P2602 ing or premises that must be changed or replaced shall be left
INDIVIDUAL WATER SUPPLY AND in a safe structural condition in accordance with the require-
SEWAGE DISPOSAL ments of the building portion of this code.
P2602.1 General. The water-distribution system of any build- P2603.2 Drilling and notching. Wood-framed structural
ing or premises where plumbing fixtures are installed shall be members shall not be drilled, notched or altered in any man-
connected to a public water supply. Where a public water-sup- ner except as provided in Sections R502.8, R602.6, R802.7
ply system is not available, or connection to the supply is not and R802.7.1. Holes in load-bearing members of cold-formed
feasible, an individual water supply shall be provided. Individ- steel light-frame construction shall be made only in accor-
ual water supplies shall be constructed and installed in accor- dance with Sections R505.2.6, R603.2.6 and R804.2.6. In
dance with the applicable state and local laws. Where such laws accordance with the provisions in Sections R505.3.5,
do not address the requirements set forth in NGWA-01, indi- R603.3.3 and R804.3.4, cutting and notching of flanges and
vidual water supplies shall comply with NGWA-01 for those lips of load-bearing members of cold-formed steel light-
requirements not addressed by state and local laws. frame construction shall be prohibited. Structural insulated
Sanitary drainage piping from plumbing fixtures in buildings panels (SIPs) shall be drilled and notched or altered in accor-
and sanitary drainage piping systems from premises shall be dance with the provisions of Section R613.7.
connected to a public sewer. Where a public sewer is not avail-
able, the sanitary drainage piping and systems shall be con- P2603.2.1 Protection against physical damage. In con-
nected to a private sewage disposal system in compliance with cealed locations, where piping, other than cast-iron or gal-
state or local requirements. Where state or local requirements vanized steel, is installed through holes or notches in studs,
1
do not exist for private sewage disposal systems, the sanitary joists, rafters or similar members less than 1 / inches (31.8
4
mm) from the nearest edge of the member, the pipe shall be
2018 INTERNATIONAL RESIDENTIAL CODE ® 619
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