Appendix B Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances and Appliances Listed for Use With Type B Vents

Appendix C Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems

Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation

Appendix E Manufactured Housing Used as Dwellings

Appendix F Radon Control Methods

Appendix G Piping Standards for Various Applications

Appendix H Patio Covers

Appendix I Private Sewage Disposal

Appendix J Existing Buildings and Structures

Appendix K Sound Transmission

Appendix L Permit Fees

Appendix M Home Day Care—R-3 Occupancy

Appendix N Venting Methods

Appendix O Automatic Vehicular Gates

Appendix P Sizing of Water Piping System

Appendix Q Tiny Houses

Appendix R Light Straw-Clay Construction

Appendix S Strawbale Construction

Appendix T [RE] Solar-Ready Provisions—Detached One- And Two-Family Dwellings and Townhouses

Chapter 25 Plumbing Systems

The provisions of the "Ohio Plumbing Code" as referenced in Chapter 44 shall be incorporated herein, except as modified in Section 2501.1.1, and shall govern the installation, testing and operation of the plumbing in buildings within the scope of this code.

2501.1.1 Modifications to the "Ohio Plumbing Code"

The following sections of the "Ohio Plumbing Code" shall be deleted and replaced with the following language:

417.5.2 Shower lining requirements. Floors under shower compartments, except where prefabricated receptors have been provided, shall be lined and made water tight utilizing material complying with Sections 417.5.2.1 through 417.5.2.5. Such liners shall turn up on all sides at least 2 inches (51 mm) above the finished threshold level. Liners shall be recessed and fastened to an approved backing so as not to occupy the space required for wall covering, and shall not be nailed or perforated at any point less than 1 inch (25 mm) above the finished threshold. Liners shall be pitched onefourth unit vertical in 12 units horizontal (2-percent slope) and shall be sloped toward the fixture drains and be securely fastened to the waste outlet at the seepage entrance, making a water-tight joint between the liner and the outlet.

Exceptions:

Floor surfaces under shower heads provided for rinsing laid directly on the ground are not required to comply with this section.
Where a sheet-applied, load-bearing, bonded, waterproof membrane is installed as the shower lining, the membrane shall not be required to be recessed.

1002.4 Trap seals. Each fixture trap shall have a liquid seal of not less than 2 inches (51 mm) and not more than 4 inches (102 mm), or deeper for special designs relating to accessible fixtures. Where a trap seal is subject to loss by evaporation, a trap seal primer valve shall be installed. Trap seal primer valves shall connect to the trap at a point above the level of the trap seal. A trap seal primer valve shall conform to ASSE 1018 or ASSE 1044.

Exceptions:

Where a trap is supplied with water on a regular basis, a trap seal primer valve shall not be required.
A trap seal primer valve is not required in garage floor drains in one-, two- and three-family dwellings.

International Residential Code 2018 (IRC 2018)

Chapter 25 Plumbing Systems

Section 2501 Plumbing Systems

2501.1 Plumbing Systems

2501.1.1 Modifications to the "Ohio Plumbing Code"