1 in. x 100 ft. Pvc Schedule 40 Black Ultra Flexible PipeTekTube ultra flex flexible pvc pipe is nsf certified and iapmo approved Cannot use the flexible pvc pipe in dead head pressure situations. Head pressure (due to gravity) up to it's rated working pressure is okay. When the system is pressurized there must be flow in the pipe Made of FDA non toxic formulation, UV and antimicrobial resistant, can be used buried or above ground, be sure to use right pvc glue when bonding flexible pvc pipe to fittings and