NAVION iQ Fresh Water Tank Drain

We recently purchased a new ITASCA NAVION iQ 24 G. On our first trip, all went well except for the fresh water tank drain mechanism. On the first pull of the release handle the drain did not open and all that came out was about 2 feet of wire attached to the release handle. We have been waiting about 3 weeks for "replacement parts" from Winnebago.

Anyone have similar problems with other Itasca or Winnebago Class C's?

The owner's manual is not clear - is there a "proper" way to drain the fresh water tank?

Thanks for your consideration.