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1003.2.3 Service Water Systems
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Service water systems and equipment shall be in accordance with the following:
- Water heater and hot water storage tanks shall have a combined minimum total of external and internal insulation value of R-16.
- Accessible hot and cold water supply and distribution pipes shall comply with Section 607.6. The insulation shall not be required to extend beyond the building thermal envelope.
- Circulating pump systems for hot water supply purposes other than comfort heating shall be controlled as specified in Section 607.7.
- Showerhead, toilet, urinal and faucet flow rates shall be in accordance with this code.