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Pressure and temperature.

Municipal Code of Chicago § 18-28-1502.4.1
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18-28-1502.4.1 Pressure and temperature. Solar energy system components that contain pressurized fluids shall be protected against pressures and temperatures that exceed design limitations with a pressure and temperature relief valve. Each section of the system in which excessive pressures are capable of developing shall have a relief device that is located so that no section of the system can be valved off or otherwise isolated from a relief device. Relief valves shall comply with the requirements of Section 18-28-1006.4 and discharge in accordance with Section 18-28-1006.6.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2689287Fetched: 10/24/2026

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