P&ID
Domestic Hot Water Recirculation Circuit Diagram
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CASE ANALYSIS
Scenario
A domestic hot water recirculation circuit uses a tankless water heater and a recirculation pump to provide instant hot water at fixtures by returning cooled water to the heater.
Key decisions
- Use boiler equipment to represent the tankless water heater
- Add check valve to prevent reverse flow in recirculation line
- Model return line as a separate path from fixtures back to heater inlet via pump
When to reuse this
Reuse for any residential or light commercial hot water recirculation loop with a tankless heater and dedicated return pump.
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pid-domestic-hot-water-recirculation-circuit-diagram-with-tankle