## Tap water meter

### Flow conversion

Input Result l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h l/s l/min l/h m3/s m3/min m3/h in3/s in3/min in3/h ft3/s ft3/min ft3/h

### Minimum flow (Q1)

The lowest approved flow passing through the meter.

### Limit flow (Q2)

The boundary flow is the flow between low flows and higher measurement errors and higher flows and lower measurement errors.

### Permanent flow (Q3)

The constant flow for which the meter is approved. When selecting a meter choose the meter whose Q 3 flow is closest to the probable flow is selected.

### Overload flow (Q4)

The largest short-term flow that the meter manages satisfactorily without taking any damage, is normally short-lived as 1 hour per day or a maximum of 200 hours per year.

### Nominal flow (Qn)

An older way of measuring water flow according to EEG

Comparison of Q3 and Qn
Permanent flow Q3 2,5 4 10 16 25 40 63 100 160 250 m3/h
Nominal flow Qn 1,5 2,5 6 10 15 25 40 60 100 150 m3/h

### Parallel connected meters

A compilation of some advantages and disadvantages of having parallel connected meters compared to a larger one.

 Benefits of parallel connected meters - Replacement or servicing of meters does not cause any interruption in the water supply to the building. - The fixed annual cost is in many cases lower with more and smaller meters than a larger one. - With varying consumption that parts of the premises are not used, it is easier to reduce the subscription. Disadvantages with parallel connected meters - Takes up more space. - More pipes and valves provide a higher installation cost.