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Service water systems and equipment shall be in accordance with the following:
  1. Water heater and hot water storage tanks shall have a combined minimum total of external and internal insulation value of R-16.
  2. 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.
  3. Circulating pump systems for hot water supply purposes other than comfort heating shall be controlled as specified in Section 607.7.
  4. Showerhead, toilet, urinal and faucet flow rates shall be in accordance with this code.

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