Recirculation Pump Size Calculator
Size a hot water recirculation pump from loop length and pipe size.
Compare Your Options And Get Clear Answers
Size a hot water recirculation pump from loop length and pipe size.
Recirculation Pump Size Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Recirculation Quick Guide
Typical values for reference.
| Pipe | Flow at 0.6 m/s | Head | Note |
|---|---|---|---|
| 15 mm | 6 L/min | 1 m | Small |
| 20 mm | 11 L/min | 1.5 m | Typical |
| 25 mm | 18 L/min | 2 m | Large |
| 32 mm | 31 L/min | 3 m | Commercial |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Recirculation Pump Size Calculator FAQ
Answers to common questions about this calculator.
From the pipe flow at a target velocity and the loop head loss.
It gives a quick estimate of recirculation pump size from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.