Oklahoma Administrative Code
Title 748 - Oklahoma Uniform Building Code Commission
Chapter 20 - Adopted Codes
Subchapter 6 - IRC[®] 2018
Section 748:20-6-34 - IRC[®] 2018 Chapter 29 Water Supply and Distribution

Universal Citation: OK Admin Code 748:20-6-34

Current through Vol. 42, No. 1, September 16, 2024

Chapter 29 of the IRC® 2018 is adopted with the following modifications:

(1) Section P2902.5.3 Lawn irrigation systems. This section has been modified to add a spill resistant backflow preventer as an option for protection. This section has been modified to read: P2902.5.3 Lawn irrigation systems. The potable water supply to lawn irrigation systems shall be protected against backflow by an atmospheric vacuum breaker, a pressure vacuum breaker assembly, a spill resistance vacuum breaker or a reduced pressure principal backflow prevention assembly. Valves shall not be installed downstream from an atmospheric vacuum breaker. Where chemicals are introduced into the system, the potable water supply shall be protected against backflow by a reduced pressure principal backflow prevention assembly.

(2) Section P2904.1.1 Required sprinkler locations. This section has been modified to clarify sprinklers shall only be installed to protect all areas of a townhouse dwelling unit. This section has been modified to read: Section P2904.1.1 Required sprinkler locations. Sprinklers shall be installed to protect all areas of a townhouse dwelling unit.

(A) Item 1: Attics, crawl spaces and normally unoccupied concealed spaces that do not contain fuel-fired appliances do not require sprinklers. In attics, crawl spaces and normally unoccupied concealed spaces that contain fuel-fired equipment, a sprinkler shall be installed above the equipment; however, sprinklers shall not be required in the remainder of the space.

(B) Item 2: Clothes closets, linen closets, and pantries not exceeding 24 square feet (2.2 meters squared) in area with the smallest dimension not greater than 3 feet (915 mm) and having wall and ceiling surfaces of gypsum board.

(C) Item 3: Bathrooms not more than 55 square feet (5.1 square meters) in area.

(D) Item 4: Garages; carports; exterior porches; unheated entry areas, such as mud rooms, that are adjacent to an exterior door and similar spaces.

(3) Section P2906.4 Water service pipe. This section has been modified to require piping materials not third-party certified for water distribution, to terminate at least 30 inches outside of the exterior wall. It has also been modified to strike the requirement of the termination to be before the full open valve located at the entrance to the structure. This section has been modified to read: P2906.4 Water service pipe. Water service pipe shall conform to NSF 61 and shall conform to one of the standards indicated in Table P2906.4. Water service pipe or tubing, installed underground and outside of the structure, shall have a minimum working pressure rating of not less than 160 pounds per square inch at 73 degrees Fahrenheit (1103 kPa at 23 degrees Celsius). Where the water pressure exceeds 160 pounds per square inch, (1103 kPa), piping material shall have a rated working pressure equal to or greater than the highest available pressure. Water service piping materials not third-party certified for water distribution shall terminate at least 30 inches outside the exterior wall. Ductile iron water service piping shall be cement mortar lined in accordance with AWWA C104/A21.4.

(4) Section P2906.9.1.4 PVC plastic pipe. This section has been modified to add a clear primer as another option to be applied to PVC solvent-cemented joints. This section has been modified to read: P2906.9.1.4 PVC plastic pipe. A clear or purple primer, or other approved primer that conforms to ASTM F 656 shall be applied to PVC solvent-cemented joints. Solvent cement for PVC plastic pipe conforming to ASTM D 2564 shall be applied to all joint surfaces.

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