Shields Clear PVC Tubing has a single layer FDA formula vinyl. This hose is primarily used for non-pressurized potable water system supplies and drain lines (sink, shower, icebox). This hose is NOT for use in hot water or pressurized water systems. Sierra Part #116-150-0146. Primarily used for non-pressurized water systems Not for use in hot water 1/4" Clear PVC Tubing 50&';L.