Novaflex Series 140. Corrugated PVC Sanitation Hose. Highly flexible PVC sanitation hose designed primarily as a discharge hose. Applications include: potable water fill, drain lines, holding tank pump-out and bilge discharge. FDA approved compound. Tube & filler is a special FDA PVC resin developed for extreme flexibility. Smooth tube with corrugated outside diameter. (Not designed for below waterline applications)