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Solar loops shall be in accordance with Sections M2301.2.11.1 and M2301.2.11.2.
M2301.2.11.1 Solar Loop Isolation
Valves shall be installed to allow the solar loop to be isolated from the remainder of the system.
M2301.2.11.2 Drain and Fill Valve Labels and Caps
Drain and fill valves shall be labeled with a description and warning that identifies the fluid in the solar loop and a warning that the fluid might be discharged at high temperature and pressure. Drain caps shall be installed at drain and fill valves.