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Chapter IX — BUILDING REGULATIONS›Article 4 — PLUMBING CODE

Los Angeles Municipal Code Div. 6 Water Supply and Distribution

Los Angeles Municipal Code · 2026-10 edition · updated 2026-10-19 · Los Angeles

Cite as: Los Angeles Municipal Code Division 6 · Text as of 2026-10-19

SEC. 94.600.0. BASIC PROVISIONS.

(Amended by Ord. No. 188,797, Eff. 12/31/25.)

Chapter 6 of the CPC is adopted by reference with the following exceptions: CPC Sections 603.5.12 and 610.5 are not adopted and Los Angeles Municipal Code Subsections 94.94.610.4.1, 94.610.4.1.1, 94.610.4.1.2, 94.610.4.1.3, and 94.610.5 are added.

94.610.4.1. Hot Water Delivery. Hot water systems shall comply with LAMC Subdivisions 94.610.4.1.1, 94.610.4.1.2 or 94.610.4.1.3.

EXCEPTIONS:

  1. Multi-family buildings where each unit is submetered and where the building has a central hot water heating system.

  2. Additions that are supplied by any portion of the existing water heating system.

  3. Alterations that do not include replacing all of the potable water piping.

94.610.4.1.1. The hot water system shall not allow more than 0.6 gallons of water to be delivered to any fixture before hot water arrives.

94.610.4.1.2. Where a hot water recirculation or electric resistance heat trace wire system is installed, the branch from the recirculating loop or electric resistance heat trace wire to the fixture shall contain a maximum of 0.6 gallons. Hot water recirculation systems may include, but are not limited to, the following:

    1. Timer-initiated systems.
    1. Temperature sensor-initiated systems.
    1. Occupancy sensor-initiated systems.
    1. Smart hot water recirculation systems.
    1. Other systems acceptable to the Department.

94.610.4.1.3. Residential units having individual water heaters shall have a compact hot water system that meets all of the following:

  1. The hot water supply piping from the water heater to the fixtures shall take the most direct path;

  2. The total developed length of pipe from the water heater to the farthest fixture shall not exceed the distances specified in Table 3.6.5 of the 2019 California Energy Code Residential Appendix; and

  3. The hot water supply piping shall be installed and insulated in accordance with Section RA3.6.2 of the 2019 California Energy Code Residential Appendix.

94.610.5. Sizing Per Appendix A. Except as provided in CPC Section 610.4, the size of each water piping system shall be determined in accordance with the procedure set forth in Appendix A.

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