This PVC Ultra-Flex Hose is made for S-4 fittings. Connecting is a breeze with any PVC glue. Can be used above or below ground installations. Flexible PVC wall & cover for ease of use. A True Sch. 4 Rigid PVC spiral resists crushing & impact. Flexible for handling and installation for Ponds, Spas and Swimming pools. Less fittings required compared with PVC pipe.