A seller who knows that the thing he sells has a defect but omits to declare it, or a seller who declares that the thing has a quality that he knows it does not have, is liable to the buyer for the return of the price with interest from the time it was paid, for the reimbursement of the reasonable expenses occasioned by the sale and those incurred for the preservation of the thing, and also for damages and reasonable attorney fees. If the use made of the thing, or the fruits it might have yielded, were of some value to the buyer, such a seller may be allowed credit for such use or fruits.
A seller is deemed to know that the thing he sells has a redhibitory defect when he is a manufacturer of that thing.