Hi All: My Polaris 360 is just a few months old but it does not seem to be working that well. The main problem is that the front does not seem to stay down. The front wheel is almost always off the ground. I wonder if it has something to do with the back--up valve? Does anyone know how far from the unit the backup module is supposed to be or why the front wheel will not stay down. I have the hose weights at 4 ft and 7 ft from the backup valve as per the instruction but I don't see anything about how far away the backup valve is supposed to be from the unit.

Thanks.