Question about Forest River Forester - fresh water valve

Same problem here. Went to Home Depot and purchased some clear tubing as it is the most flexible. It is 1/2 ID. In the same isle you will find a garden hose adapter with a barbed fitting. Also buy a hose clamp to attach. It also helps to use an in line hose shutoff so you can regulate the flow of the water. You can then shove the hose further into the tank. It is poorly designed as the air coming out uses the same inlet as the water going in. By regulating the incoming water you will find the sweet spot.