Trident Rubber 102 White Hardwall Wire Reinforced Premium Sanitation Hose, 1 inch ID, for all head & holding tank connections. Extra thick tube & cover is specially formulated EPDM Rubber for maximum resistance to odor permeation and winterizing with antifreeze. With wire helix between 2 ply reinforcement this hose has excellent bend radius, flexibility, and fitting acceptance and retention. This makes for easy installations with no heat gun or lubricant necessary. Not for potable water. Sold by the foot.