Both types of hose are available for water line in various sizes. The inside of the braided hose appears black, but the inside of the corrugated hose is a light color. They must both have a liner or they would leak. What is the different product use for braided vs corrugated? They wouldn't make both for the same application if they are equal, I wouldn't think. I have seen reports of the black liner in the braided hose disintegrating and showering downstream. Is this a known problem or a defective item.