Napa County Municipal Code Ch. 15.20 Plumbing Code

Footnotes:

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Editor's note— Ord. No. 1516, § 13, adopted December 9, 2025, amended Ch. 15.20 in its entirety to read as herein set out. Former Ch. 15.20, §§ 15.20.010—15.20.075, pertained to the same subject matter. See the Ordinance List and Code Comparative Table and Disposition List.

For the purpose of establishing proper regulations for building construction and the installation of plumbing systems, the 2025 Edition of the California Plumbing Code, hereinafter referred to as "plumbing code," including Appendices A, B, and D, and I, which is based on the 2024 Edition of the Uniform Plumbing Code as adopted with modifications by the State of California as Title 24, Part 5 of the California Code of Regulations, is adopted and made a part of this code by reference, subject to the modifications set forth in this chapter.

(Ord. No. 1516, § 13, 12-9-2025)

Each section of the plumbing code designated in succeeding sections of this chapter shall be changed to read as set forth in this chapter, except that where the modification is a deletion only, the deletion shall be noted without setting forth the text of the section, and all modifications of Chapter 7, Part II of the plumbing code are set forth in Division II, Title 13 of the code rather than in this chapter.

(Ord. No. 1516, § 13, 12-9-2025)

The functions of a board of appeals for the plumbing code referred to in Section 1.8.8 shall be performed by the unified board of appeals constituted pursuant to Section 15.04.100 of this code and no separate board of appeals shall be created.

(Ord. No. 1516, § 13, 12-9-2025)

Section 104.4.3 of the plumbing code is amended to read as set forth in Section 15.04.070 of this code.

(Ord. No. 1516, § 13, 12-9-2025)

Section 104.3.3 of the plumbing code is amended to read as set forth in Section 15.04.060 of this code.

(Ord. No. 1516, § 13, 12-9-2025)

A. The definition of "authority having jurisdiction" in Section 203.0 of the plumbing code is amended to read in full as follows:

Authority Having Jurisdiction

The Authority Having Jurisdiction shall be the building division of the Napa County Department of Planning, Building and Environmental Services; except that for the issuing of permits, collection of fees and inspections in connection with public sewers, the Authority Having Jurisdiction shall be, within their respective jurisdictions, the Napa Sanitation District, the Napa County Department of Public Works (for the Napa Berryessa Resort Improvement District and the Lake Berryessa Resort Improvement District), the Spanish Flat Water District or the Circle Oaks Water District; and for the administration of the provisions of the plumbing code relating to individual and private sewage disposal systems as defined in Division II of Title 13 of the Napa County Code (other than Section 723 of the plumbing code), the Authority Having Jurisdiction shall be the Napa County director of planning, building and environmental services or the director's authorized designee.

B. The definition of "lot" in Section 214.0 of the plumbing code is amended to read as set forth in Section 17.02.320 of this code.

C. The definition of "private sewage disposal system" in Section 218.0 of the plumbing code is amended to read as set forth in Section 13.16.345 of this code.

D. The definition of "public sewer" in Section 218.0 of the plumbing code is amended to read as set forth in Section 13.16.350 of this code.

E. The definition of "sewage" in Section 221.0 of the plumbing code is amended to read as set forth in Section 13.16.360 of this code.

(Ord. No. 1516, § 13, 12-9-2025)

Section 609.1 of the plumbing code is amended to read as set forth in full as follows:

609.1 Installation. Water piping shall be adequately supported in accordance with Table 313.3. Burred ends shall be reamed to the full bore of the pipe or tube. Changes in direction shall be made by the appropriate use of fittings, except that changes in direction in copper or copper alloy tubing shall be permitted to be made with bends, provided that such bends are made with bending equipment that does not deform or create a loss in the cross-sectional area of the tubing. Changes in direction are allowed with flexible pipe and tubing without fittings in accordance with the manufacturer's instructions. Provisions shall be made for expansion in hot-water piping. Piping, equipment, appurtenances, and devices shall be installed in a workmanlike manner in accordance with the provisions and intent of the code. Building supply yard piping shall be not less than 12 inches (305 mm) below the average local frost depth. The cover shall be not less than 12 inches (305 mm) below finish grade. When water lines are installed underground within a vineyard, or other agricultural location where equipment is used to cultivate the earth, the burial depth shall be sufficiently lower than the potential cutting depth of equipment, but not less than 48" of cover in all cases.

(Ord. No. 1516, § 13, 12-9-2025)

The provisions of Chapter 7, part II, "Building Sewers," of the plumbing code are incorporated, with modifications, into Division II, "Sewage Systems," of Title 13 of this code, with the corresponding plumbing code references noted therein, except that Section 723 of the plumbing code is adopted without modification by and under this chapter.

(Ord. No. 1516, § 13, 12-9-2025)

Section 1210.1.1 of the plumbing code is amended to read as set forth in full as follows:

Underground piping systems shall be installed with a minimum of 12 inches (305 mm of cover. The minimum cover shall be increased to 18 inches (457 mm) if external damage to the pipe or tubing from external forces is likely to result. Where a minimum of 12 inches (305 mm) of cover cannot be provided, the pipe shall be installed in conduit or bridged (shielded). [NFPA 54:7.1.2.1 - 7.1.2.1 (B) ] When natural or liquefied petroleum gas (LPG) lines are installed underground within a vineyard, or other agricultural location where equipment is used to cultivate the earth, the burial depth shall be sufficiently lower than the potential cutting depth of equipment, but not less than 48" of cover in all cases.

(Ord. No. 1516, § 13, 12-9-2025)