Water pump on Warwick XL

We have a 2019 Warwick XL and the water pump makes a noise all the time it is on. We've not had this problem on any previous van.  Does anyone know if we are doing something wrong?

It does not make any noise once the system is up to pressure (and all taps are closed and also drain valve). And also pressure switch set which it should be from PDI.

Is water coming out of the hot and cold tap?

As Don suggested, I'd say the pressure switch just needs turning w notch.

You'll probably find you need to adjust it when on 12v versus when on 240v too 

Thank you both so much for your replies.  I was rather worried! It must be that when demonstrated it was on 240v and we're now on 12v and haven't adjusted.  The controls of this van are very much more sophisticated that our previous and it takes some getting used to.  Much better though! Kind regards.

Suggest you mark the position of the pressure switch before you alter it, so you can go back to the factory setting if it proves difficult to adjust.

They can be very sensitive, so it may need only a tiny tweak one way or the other. When you find the best settings for 12 volt and 240 volt respectively, another mark will make it easy to adjust thereafter.

A bit of a fiddle, but like lots of other motorhome practices it's not a problem once you are used to it.

We had exactly the same and easily cured it by adjusting the pressure switch as mentioned above.
I quite agree about the complicated equipment in modern vans. Our last one was 24 years old (Autosleeper Symphony) and very simple by comparison!