Fresh Water Tank Problem in Itasca Navion
My wife & I recently purchased a 2008 Navion IQ. We've rented RV's out west a number of times for 10-12 days at a time so we have some RVing experience. One of the key reasons we liked this unit is w...
Forum Discussion
A belated thanks to Old-Biscuit & bobojay5. There is a detailed post on this problem and a fix in the Yahoo View Navion forum (messages #72666 & #85739). I confirmed the problem is the tank vent was not properly designed. When overfilling the tank the overflow line creates a siphon that drains about a 3rd of the tank before it stops. In addition, the siphon effect occurs again while braking and on steep hills. The net effect is a tank that is supposed to hold 34 gallons ends up with about 12-15 gallons. It puzzles me that a company with Winnebago's experience would have overlooked such a design flaw. The solution seems pretty straight forward. I intend to install a anti-siphon loop with a check valve inside the service area below the refrigerator. This will effectively raise the outlet level and break the siphon effect. Thanks again for your help!
