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Expansion tanks.

Municipal Code of Chicago § 18-28-1502.4.4
in effect
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18-28-1502.4.4 Expansion tanks. Liquid single-phase solar energy systems shall be equipped with expansion tanks sized in accordance with Article 10, Boilers, Water Heaters and Pressure Vessels.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2689293Fetched: 10/24/2026

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18-28-1502.4.4 | Corpus