A. CPC section 312.4 is amended to read as follows:
Corrosion, Erosion, and Mechanical Damage. Each system of buried ferrous piping used for either potable water or gas supply shall have a protective coating of an approved type, machine applied and conforming to recognized standards. Field wrapping shall provide equivalent protection and is restricted to those short sections and fittings necessarily stripped for threading.
All buried ferrous piping shall be installed with cathodic protection. Private gas mains and laterals coming within the scope of the Federal Regulations for Pipeline Safety shall be designed and the installation supervised for compliance by a person qualified by experience and training in pipeline corrosion control methods. Supply piping for buildings shall be installed according to the same standards or by the use of Table 312.4 of this code.
When Table 312.4 is used, the piping system shall be installed according to the following requirements:
1. Galvanic anodes for cathodic protection of ferrous piping shall be buried not less than three feet below grade, and below the bottom of the pipe to be protected. They shall be not less than four feet horizontally from any buried metallic pipe. Before backfilling, the anode shall be flooded with a minimum of five gallons of water.
2. Connecting of the anode to the pipe, when made less than six inches above grade, shall be with a thermite weld. Connections six inches or more above grade may be made by the use of an approved electrical service grounding clamp.
3. Water supply piping shall be isolated at the connection of the utility or private tap from the water main and at each building foundation line adjacent to the full way shut-off valve.
4. Gas supply piping shall be isolated adjacent to each building foundation line or at the appliance when located outside the building and from the serving gas supplier's service equipment.
5. Approved isolation fittings shall be located a minimum of six inches above grade, except at the water tap.
6. Any piping laid in the same trench with pipe requiring cathodic protection shall be separated laterally a minimum of 12 inches, and piping installed diagonally above pipe requiring cathodic protection shall be separated vertically a minimum of six inches. All separations shall be maintained with clean earth in accordance with CPC section 314.
7. All piping regulated by this code and subject to undue corrosion, erosion or mechanical damage shall be protected in an approved manner.
B. Table 312.4 is added to Chapter 3 of the CPC to read as follows:
Table 312.4. Anode Selection Chart
Allowable Length of Coated and Wrapped Buried Ferrous Gas or Water Pipe | ||||||
Pipe Size | ||||||
Anode Size | 1/2" | 3/4" & 1" | 1-1/4" & 1-1/2" | 2" | 3" | 4" |
Allowable Length of Coated and Wrapped Buried Ferrous Gas or Water Pipe | ||||||
Pipe Size | ||||||
Anode Size | 1/2" | 3/4" & 1" | 1-1/4" & 1-1/2" | 2" | 3" | 4" |
1 lb. anode | 50 ft | - | - | - | - | - |
3 lb. anode | 150 ft | 100 ft | 50 ft | 50 ft | - | - |
9 lb. anode | 500 ft | 200 ft | 200 ft | 150 ft | 100 ft | 100 ft |
17 lb. anode | - | 500 ft | 350 ft | 300 ft | 250 ft | 150 ft |
32 lb. anode | - | - | 500 ft | 500 ft | 450 ft | 350 ft |
C. Subsection 1101.12.3 is added to CPC section 1101.12 to read as follows:
For the purpose of sizing roof drains, conductors, leaders, gutters, and storm sewers, the rainfall rate used for calculations shall be 3 inches per hour.
D. CPC section 1503.1.4 is added to read as follows:
1503.1.4 Subsurface Irrigation
For building permit applications filed on or after July 1, 2023, buildings that are 10,000 square feet or greater must include a gray water system to provide subsurface irrigation as provided in this chapter.
Exceptions:
(1) Gray water systems are not required for any buildings or parts of a building with a California Building Code, Chapter 3 R-2, R-2.1, R-3, R-3.1, or R-4 occupancy classification.
(2) Gray water systems are not required for additions and improvements, including tenant improvements, in existing buildings as defined in the California Building Code.
(3) Gray water systems are not required for a child-care center; grocery store to be constructed in a food desert; mini storage, locker building; or warehouse, distribution center.
E. Exception (3) is added to section 1503.3 to read as follows:
(3) A potable water supply may supplement a gray water system to provide subsurface irrigation through the use of an air gap as specified in Table 603.2.
F. CPC section 1506.1.1 is added to read as follows:
1506.1.1 Installation of separate, additional piping system for on-site treated nonpotable gray water systems
For building permit applications filed on or after July 1, 2023, buildings that are 50,000 square feet or greater must include installation of a separate, additional piping system for an on-site treated nonpotable gray water system for water closets and urinals.
Exceptions:
(1) Installation of a separate, additional piping system for an on-site treated nonpotable gray water system is not required for any buildings or parts of a building with a California Building Code, Chapter 3 R-2, R-2.1, R-3, R-3.1, or R-4 occupancy classification.
(2) Installation of a separate, additional piping system for an on-site treated nonpotable gray water system is not required for additions and improvements, including tenant improvements, in existing buildings as defined in the California Building Code.
(3) Installation of a separate, additional piping system for an on-site treated nonpotable gray water system is not required for a child-care center; grocery store to be constructed in a food desert; mini storage, locker building; or warehouse, distribution center.
G. Exception (3) is added to Section 1506.4 to read as follows:
(3) A potable water supply may be connected to a separate, additional piping system for an on-site treated nonpotable gray water system for water closets and urinals through the use of a reduced pressure principle backflow prevention assembly as specified in Table 603.2. Upon introduction of an on-site treated nonpotable water source to the separate piping system, an air gap shall be installed pursuant to Table 603.2.
H. The following definition is added to California Plumbing Code section 205.0:
Child-care Center. "Child-care center" has the same meaning as defined in California Building Code section 202.
I. The following definition is added to California Plumbing Code section 208.0:
Food Desert. A census tract that has (i) a median household income at or below 80% of the Sacramento County median household income and (ii) at least 33% of the census tract's population living more than one mile from an existing grocery store.
J. The following definition is added to California Plumbing Code section 209.0:
Grocery Store. A building or a portion of a building with a California Building Code, Chapter 3, Section 309, Group M occupancy classification with more than 50% gross floor area devoted to the sale of non-taxable merchandise.
K. The following definition is added to California Plumbing Code section 215.0:
Mini storage, locker building. A building that offers individually secured units or surface space for the storage of goods, other than hazardous materials, for rental to the public, each of which is accessible only by the renter of the individual unit or space.
L. The following definition is added to California Plumbing Code section 225.0:
Warehouse, distribution center. A building used primarily for the long-term or short-term storage of goods and materials awaiting transportation or distribution, and not generally accessible to the general public. Incidental storage, repair, and maintenance of trucks associated with the distribution of goods from the warehouse are allowed.
(Ord. 2022-0031 § 2; Ord. 2022-0026 § 9; Ord. 2016-0052 § 8; Ord. 2014-0001 § 9; Ord. 2011-026 § 5)