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Earlier editions: 2026-09

Title 9 — BUILDING REGULATIONS›Chapter 2 — PLUMBING CODE

Modesto Municipal Code Art. 2 General Code Provisions

Modesto Municipal Code · 2026-10 edition · updated 2026-10-04 · Modesto

Cite as: Modesto Municipal Code Article 2 · Text as of 2026-10-04

9-2.201 - Title.

These regulations shall be known as the "Plumbing Code of the City of Modesto," and may be cited and referred to herein as such or may be cited and referred to herein as the "Plumbing Code," the "[2025] California Plumbing Code," the "California Plumbing Code," or "this Code."

(Ord. 3462-C.S., § 1, effective 1-3-08; Ord. 3544-C.S., § 2, effective 1-13-11; Ord. 3595-C.S., § 2, effective 1-3-14; Ord. 3661-C.S., § 1, effective 1-6-17)

(Ord. No. 3710-C.S., § 1, effective 12-26-2019; Ord. No. 3758-C.S., § 1, effective 1-24-23; Ord. No. 3809-C.S., § 1, effective 6-11-26)

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9-2.202 - Purpose.

The purpose of this Code is to establish the minimum requirements to safeguard the public health, safety, and general welfare through structural strength, means of egress facilities, stability, access for persons with disabilities, sanitation, adequate light and ventilation, and energy conservation; safety to life and property from fire and other hazards attributed to the built environment; and to provide safety to firefighters and emergency responders during emergency operations.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.203 - Scope.

The provisions of this Code shall apply to the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, maintenance, removal and demolition of every building or structure or any appurtenances connected or attached to such buildings or structures throughout the City of Modesto.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.204 - Appendices.

Provisions contained in the appendices of the California Plumbing Code shall not apply unless specifically adopted by the State of California or the City of Modesto.

(Ord. 3462-C.S., § 1, effective 1-3-08)

(Ord. 3661-C.S., § 1, effective 1-6-17; Ord. No. 3710-C.S., § 1, effective 12-26-2019; Ord. No. 3758-C.S., § 1, effective 1-24-23)

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9-2.205 - Maintenance.

All plumbing or drainage systems, materials, and appurtenances, both existing and new, and all parts thereof, shall be maintained in proper operating condition. All devices or safeguards required by this Code shall be maintained in conformance with the code edition under which installed.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.206 - Additions, Alterations, or Repairs.

Additions, alterations, or repairs may be made to any plumbing or drainage system, or parts thereof, or equipment without requiring the existing to comply with all the requirements of this Code, provided the addition, alteration, or repair conforms to that required for new installation. Additions, alterations, or repairs shall not cause an existing system to become unsafe, unsanitary, or overloaded.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.207 - Moved Buildings.

Plumbing or drainage systems and all parts thereof, that are part of buildings or structures moved into the City of Modesto shall comply with the provisions of this Code for new installations.

Exception. All parts of the plumbing or drainage system of any building, or parts thereof, that is moved from one (1) foundation to another, or from one (1) location to another, shall be completely tested as prescribed elsewhere in this Code for new work, except that walls or floors need not be removed during such test when other equivalent means of inspection acceptable to the Building Official are provided.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.208 - Most Restrictive—Specific Requirement.

Where, in any specific case, different sections of this Code specify different materials, methods of construction, or other requirements, the most restrictive shall govern. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall be applicable.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.209 - Other Laws.

The provisions of this Code shall not be deemed to nullify any provision(s) of local, state, or federal law.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.210 - Application of References.

References to chapter or section numbers, or to provisions not specifically identified by number, shall be construed to refer to such chapter, section or provision of this Code.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.211 - Referenced Codes and Standards.

The codes and standards referenced in this Code shall be considered part of the requirements of this Code to the prescribed extent of each such reference. Where differences occur between provisions of this Code and referenced codes and standards, the provisions of this Code shall apply, unless stated otherwise.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.212 - Partial Invalidity.

In the event that any part or provision of this Code is held to be illegal or void, this shall not have the effect of making void or illegal any of the other parts or provisions of this Code.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.213 - Existing Installations.

Plumbing systems or equipment lawfully in existence at the time of the adoption of this Code may have their use, maintenance, or repair continued if the use, maintenance, or repair is in accordance with the original design and location and no hazard to life, health, or property has been created by such system or equipment.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.214 - Existing Building Sewers and Drains.

Existing building sewers and drains may be used in connection with new buildings or new plumbing and drainage work only when they are found on examination and test to conform in all respects to the requirements governing new work, and the Building Official shall notify the owner to make any changes necessary to conform to this Code. No building or part thereof shall be erected or placed over any part of a drainage system which is constructed of materials other than those approved elsewhere in this Code for use under or within a building.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.215 - Drainage Openings.

All openings into a drainage or vent system, excepting those openings to which plumbing fixtures are properly connected or which constitute vent terminals, shall be permanently plugged or capped in an approved manner, using the appropriate materials required by this Code.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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9-2.216 - Conflicts Between Plumbing and Mechanical Code.

When the requirements within the jurisdiction of the Plumbing Code referenced in Section 9-2.101 conflict with the Mechanical Code referenced in Section 9-7.101, the Plumbing Code shall prevail.

(Ord. 3462-C.S., § 1, effective 1-3-08)

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