Chapter 13 — HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS
1314.10 Zone Valves — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Plumbing Code (Title 24, Part 5) § 1314.10 · Effective January 1, 2026 · Official source: Building Standards Commission
All station outlets/inlets shall be supplied through a zone valve, which shall be placed as follows:
(1) It is installed so that a wall intervenes between the valve and the outlets/inlets that it controls.
(2) It is readily operable from a standing position.
(3) It is installed where it is visible and accessible at all times.
(4) It is not installed where it can be hidden from plain view, such as behind normally open or normally closed doors.
(5) It is not installed in a room with the station outlets/inlets that it controls.
(6) It is not installed in rooms, areas, or closets that can be closed or locked. [NFPA 99:5.1.4.6.1]
1314.10.1 Readily Accessible. A zone valve in each medical gas or vacuum line shall be provided for each Category 1 space and anesthetizing location for moderate sedation, deep sedation, or general anesthesia specific for the occupancy, and shall be located as follows:
(1) They are installed immediately outside the area controlled.
(2) They are installed where they are visible and accessible at all times. [NFPA 99:5.1.4.6.2]
1314.10.2 Arrangement. Piping on the patient side of zone valves shall be arranged to provide the following:
(1) Shutting off the supply of medical gas or vacuum to one zone will not affect the supply of medical gas or vacuum to another zone or the rest of the system.
(2) Service will only be to outlets/inlets located on that same story.
(3) All gas delivery columns, hose reels, ceiling tracks, control panels, pendants, booms, or other special installations are located on the patient side of the zone valve. [NFPA 99:5.1.4.6.3]
TABLE 1314.5(1) POSITIVE PRESSURE GASES
[NFPA 99: TABLE 5.1.4.1.6(a)]
For SI units: 1 inch = 25.4 mm
TABLE 1314.5(2) VACUUM AND WAGD
[NFPA 99:TABLE 5.1.4.1.6(b)]
For SI units: 1 inch = 25.4 mm
HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS
1314.10.3 Indicators. A pressure/vacuum indicator shall be provided on the station outlet/inlet side of each zone valve. [NFPA 99:5.1.4.6.4]
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