Abstract: A fluid line connector assembly for connecting between two fluid transmission lines or between a transmission line and an appliance or other apparatus, such as a commercial fryer. The assembly includes a length of thin-walled, flexible tubing having helical corrugations extending therealong and opposing non-corrugated and generally cylindrical ends. A braided sheath extends along the exterior of the tubing and is secured at the tubing ends. A base ring is received on a tubing end and includes a first groove. An end fitting, including an interior passage having a second groove, is retained on and cooperable with the tubing end due to a retaining ring captured within a portion of each groove, allowing the end fitting to remain rotatable relative to the tubing. One or more o-rings are compressively positioned between the end fitting and the tubing end to form a fluid-tight seal therebetween.