Water flow and pressure: the responsibility of SWDE


The Water Code requires us to ensure a minimum flow rate of 300 l/h under the usual operating conditions of the network. We must also guarantee a static pressure of between 2 and 10 bar at the meter location (excluding deviation and isolated cases).


What to do if there is a lack of flow or a pressure problem?


If you feel that the requirements of the Water Code are not being met, you can request a check of the water flow and pressure by contacting us

If there is a flow or pressure problem, the water from your tap will not flow properly. We explain how to tell the difference between flow and pressure and how to overcome the problem.

Flow vs. pressure: what is the difference?

The flow rate is the volume of water (expressed in litres or m³) that flows for a given time (e.g. seconds or minutes). The longer it takes to fill the container, the lower the flow rate. 

To assess this, calculate the time needed to fill a container (sink, bucket, etc.). For example, the minimum flow rate of 300 l/h provided for by the Water Code under normal network operating conditions corresponds to filling a 10 litre bucket in 2 minutes.  

Pressure is the force exerted by water on a surface. It is measured in bar or kgf/cm². 

To measure it, try to stop the flow of water by blocking the end of the tap with your thumb. The easier it is to seal, the lower the pressure.

What to do if there is lack of flow?

You should check the condition of your installation.

  • Remove the filters from the taps. If they are clogged with limescale particles, clean them by soaking them in vinegar and rinsing them.
  • Check that the stopcock is fully open.
  • Check that the shut-off valves are also open and not blocked by limescale (no need to dismantle them for this, simply operate them a few times).



    What to do if there is a lack of pressure?

    In the event of a drop in pressure, you must ensure that your pressure reducing valve (not compulsory for private installations) is working properly.