Abstract: A fluid line assembly includes an outer fluid line and an inner fluid line. The inner and outer fluid lines each include a slip joint. At least one of the slip joints include a variable volume reservoir in communication with the interior of the corresponding fluid line. The reservoir is at least partially defined by a first tube section, a second tube section having an axially extending portion and radially extending portion, and a radially extending piston connected to the first tube section for movement therewith. The at least one slip joint also includes a resiliently compressible conductive member positioned between and in contact with the piston and the radially extending portion of the second tube section to create an electrical path therebetween.