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📝 How it works:
Calculate pressure losses in pipes based on flow rate, length and material. For plumbing and heating installations.
Fill in the fields below and click "Calculate".
Calculate pressure losses in pipes based on flow rate, length and material. For plumbing and heating installations.
Fill in the fields below and click "Calculate".
Pipe losses: Pressure loss in sanitary pipes
Calculate pressure losses in water pipes for plumbing and heating:
- Pipe friction: Losses due to flow resistance
- Pipe length & diameter: Most important parameters
- Volume flow: liters/minute flow rate
- Material: copper, plastic, steel (roughness)
- Fittings: Valves, elbows, T-pieces increase loss
Guideline values for pressure loss:
- DN 15 (½"): approx. 0.3 bar/m at 10 L/min
- DN 20 (¾"): approx. 0.08 bar/m at 10 L/min
- DN 25 (1"): approx. 0.03 bar/m at 10 L/min
Example: 20m pipe DN 20, 15 L/min: Pressure loss approx. 2.4 bar. With an inlet pressure of 4 bar, 1.6 bar remains at the outlet
.Minimum pressure: tap 0.5 bar, shower 1 bar, washing machine 1 bar. If the pressure is too low: choose a larger diameter.
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