Symbol fresh water tank

Can anyone advise if the Symbol (3 years old) has an over flow on the top of the fresh water tank? I usually fill up quite fast with a hose and when the water comes out of the filler neck I stop, but this time I filled up slowly and noticed that water was under the van coming from the top of the tank.[left]

Yes ..... there is an air vent at the top and if you fill it slowly it will start coming out the vent before it overflows at the inlet.

cheers BobK

Thanks BobK that’s put my mind at rest. Just done 800 miles around the midlands from Cornwall and that was the only niggle.