1217.7 Tube Identification — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 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 Mechanical Code (Title 24, Part 4) § 1217.7 · Effective January 1, 2026 · Official source: Building Standards Commission
For the purpose of system balancing, each individual loop shall have a tag or label securely affixed to the manifold to indicate the length of the loop and the room(s) and area(s) served.
TABLE 1217.6
MAXIMUM LENGTH OF CONTINUOUS TUBING FROM
A SUPPLY-AND-RETURN MANIFOLD ARRANGEMENT
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For SI units: 1 inch = 25.4 mm, 1 foot = 304.8 mm
HYDRONICS
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