Improper intake design:
Insufficient slope between the fill and the tank because the fill line is too long, too short, or too small.
To make room for the water, you need to vent the tank as air enters. Due to the vent lines being narrower than the fill lines, you can’t release a lot of water at once. The RV owner has the option of spilling water or turning the faucet down to a volume the RV tank can handle if the amount of water entering the tank exceeds the amount of air leaving it.
FIXING A SLOW FILLING RV FRESH WATER TANK
CHECK FOR KINKS
- You’ll find a vent hose next to your RV’s fill assembly, usually on the side. Make sure it’s not kinked or obstructed. Insects can get sucked into unscreened vents.
- If you have kinks in the fill hose, make sure you fix them.
- Filling the tank is easy if the fill hose slopes evenly. Improve it if you can.
- We need a bigger venting system.
- Make sure the tank is filled under pressure.
FILL WATER TANKS WITH WATER FILLERS
Make sure your RV’s portable water tank is full in case you need a bathroom break on the way to the RV park, or if you’re planning on dry camping for just one night