Abstract: A tube assembly for communicating water under pressure from a water supply valve and a water fixture inlet tube assembled at a job site, having an elongate corrugated tube with alternating grooves and ridges and cut to length to extend between a water fixture inlet tube and a water supply valve. The tube receives a pair of nuts in opposing relation, and each nut has an interior thread sized for engaging a respective one of a water fixture inlet tube and a water supply valve. A pair of C-clips, each received in a respective one of the grooves in opposing distal end portions of the tube, define bearing surfaces for the nuts. The distal ends of the tube receive a gasket, which are adapted for sealing between the respective distal end of the tube and the water fixture inlet tube and the water supply valve.