G'day Carlos61. I bought white rubber chair leg protectors from Bunnings that fit snuggly into the filler hole. I cut a hole in the end using a sharp Stanley knife and pushed it approx 400mm onto the hose I am filling the tank with. With the hose fed into the tank and the rubber chair leg protector pushed into the filler hole, I can fill the tank with greater flow and not have water gushing out the filler. All the air gets forced out the breather. Sorry I don't have a photo I can show you as my van is in storage. Hope this helps.