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N1103.5.2 (R403.5.2) Demand Recirculation Water Systems
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Demand recirculation water systems shall have controls that comply with both of the following:
- The controls shall start the pump upon receiving a signal from the action of a user of a fixture or appliance, sensing the presence of a user of a fixture or sensing the flow of hot or tempered water to a fixture fitting or appliance.
- The controls shall limit the temperature of the water entering the cold water piping to not greater than 104°F (40°C).
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