Water leak from pressure valve

[Tyrefixer]

Can anyone help please
the pressure release valve ( Yellow Tap type ) is leaking causing the pump to fire up every 3 to 4 minutes then after a few seconds ( I assume the system re pressurises ) all quiet then after a 3 to 4 minutes off the pump goes again.
any one had similar experience, if so any ideas on how to repair or is the only alternative to replace. Vehicle type is Elddis Autoquest MH 2016

 

[iandsm]

Just replace it, they are not expensive

 

[Badknee]

I would try tripping the valve manually a few times to see if it will seat properly. It could have been sat for ages and started leaking through.

 

[Landy Andy]

Give it a few taps to open it quickly. Can be a bit or scale under the sealing seat.