Fresh water overflow?

Our Grand Design Reflection 303rls has a vent tube that comes down next to the drain valve. When it is full it really comes out as it is a 3/4" tube.

As stated above, somewhere on your camper the fresh water tank has an air vent. My previous TT all had gravity fill ports with an small screened vent tube right beside the fill port. When tank was fill, it spitted out that vent tube.

On my new 5er, the fill is located in the front bay area, and the water tank must be located in the rear. On the side of the 5er is a little black plastic thing. When the tank is full, water comes spewing out of it. That's my air vent tube. Fill yours, when water spews out of a tube or a funny looking gizmo on the side of your camper, you know the tank is full.

And, the end of that tube will be set up higher than your water tank so no water sitting in it can cause a vacuum. So, it will be located somewhere around chest high on the side of your camper.

Look under the rig in the area around the fresh water tank for a small(1/2 inch) pipe with no cap and possibly a bug screen.

Air has to go somewhere as you are filling so it should have a vent/overflow somewhere.

My Cedar Creek 36CKTS uses this valve.

Vertical is city water.

Horizontal is tank fill.




The couple of times I've filled it water did come out of an overflow.



C.B.