Fresh water tank fill hose

Hi just found out the fill hose between the fresh water filler and the tank is leaking. I have looked on eBay for a replacement but I have no idea as to what diameter I need to buy can any one help. Autosleeper Ravenna 1999.

You need to remove the existing hose and measure it.

I can't confirm the diameter but you will find replacements of all diameters here.  I also had a leak that I have fixed but it will need to be replaced at some time.  I think in my case, I will need to drop the tank.

https://www.thehosemaster.co.uk/s472-general-purpose-suction-delivery-hose/