Drip from hose under fixed water tank

Sorry but what is that white blob? It looks like a bodged attempt to make something watertight. It'll be no surprise if you have a leak there, I'm afraid.😕

I think it's a back to the dealer for a moan job.

Don't understand why there would be pressure in your water tank?. I have an onboard water tank in my Lunar Delta and the two outlets are drain and overflow. If it is drain then I would suggest the rubber washer has perished and needs replacing. Maybe someone has bodged/ attempted that by the looks of your photo's.

If I recall correctly, ADP, this is a brand new caravan and, like you, I query the comment about pressure in the water tank. The only pressure can surely be that caused by the weight of the water 🤷🏻‍♂️

I was wondering about that, but the white blob is on the wooden base where the hole was cut for the hose, l perhaps to protect the wood where the hole is. The hose has a filter in underneath, but the plug above it is impossible to get out. I have now removed all the water through other means and still can't get the plug out. So I'm wondering if it's supposed to come out. There is nothing in the handbook about it and the dealer said you don't need to open the water tank and it is better not to in case you don't close it tightly enough.

Sorry, I meant from filling it with a hose. But we did this with a low flow rate and there is an overflow pipe so I imagine that would not have caused it.

Filling the tank should never cause it to leak, other than running out of any overflow pipe.

If I'm right and this is a new van, my advice is to return to your dealer. That whole set up looks a mess, to be perfectly frank.

Netcam

              Initially you said drain pipe !....can't understand why there would be a filter in a drain pipe. My advice for what it is worth is to return to the place you purchased it from and ask for an explanation and confirmation everything is as it should be. I agree with TW looks very suspicious.

I too would agree with that.

Thanks, I've sent them an email. Will report when or if I hear anything back.

I would have thought any drain pipe would extend a little further out as regardless of any white sealer water will spread beyond it...... 

Any filter in the drain pipe is asking for trouble in my opinion.....