An assembly for connecting a sprinkler to a branch line of a fire suppression system, said assembly comprising an assembly of a flexible conduit, an adapter and a sleeve; wherein said flexible conduit has a first end, and a second end, provides fluid communication, has a corrugated outer surface, said corrugated outer surface comprising a plurality of first crests and troughs extending circumferentially around and defining a central space, said first end of said flexible conduit is connectable to said branch line, and a second end connectable to said sprinkler, said flexible conduit providing fluid communication between said branch line and said sprinkler; an adapter positioned between said sprinkler and said second end of said flexible conduit for effecting attachment of said sprinkler to said flexible conduit: characterized in that • said sleeve co-axially surrounds a portion of said flexible conduit, said sleeve and said flexible conduit being rotatable relatively to one another thereby preventing torque being applied to said flexible conduit through said sleeve, • said sleeve comprises a split unitary body having a first longitudinally extending edge and a second longitudinally extending edge in facing relation with said first longitudinally extending edge, • said first longitudinally extending edge is positioned in spaced relation to said second longitudinally extending edge so as to define a gap there-between, • said sleeve has a corrugated inwardly facing surface comprising a plurality of second crests and troughs extending circumferentially and spaced so as to fit within said first crests and troughs and thereby prevent axial sliding motion of said sleeve relatively to said conduit; and • said sleeve co-axially surrounds a portion of said flexible conduit proximate to said adapter. characterized in that • said sleeve co-axially surrounds a portion of said flexible conduit, said sleeve and said flexible conduit being rotatable relatively to one another thereby preventing torque being applied to said flexible conduit through said sleeve, • said sleeve comprises a split unitary body having a first longitudinally extending edge and a second longitudinally extending edge in facing relation with said first longitudinally extending edge, • said first longitudinally extending edge is positioned in spaced relation to said second longitudinally extending edge so as to define a gap there-between, • said sleeve has a corrugated inwardly facing surface comprising a plurality of second crests and troughs extending circumferentially and spaced so as to fit within said first crests and troughs and thereby prevent axial sliding motion of said sleeve relatively to said conduit; and • said sleeve co-axially surrounds a portion of said flexible conduit proximate to said adapter. • said sleeve co-axially surrounds a portion of said flexible conduit, said sleeve and said flexible conduit being rotatable relatively to one another thereby preventing torque being applied to said flexible conduit through said sleeve, • said sleeve comprises a split unitary body having a first longitudinally extending edge and a second longitudinally extending edge in facing relation with said first longitudinally extending edge, • said first longitudinally extending edge is positioned in spaced relation to said second longitudinally extending edge so as to define a gap there-between, • said sleeve has a corrugated inwardly facing surface comprising a plurality of second crests and troughs extending circumferentially and spaced so as to fit within said first crests and troughs and thereby prevent axial sliding motion of said sleeve relatively to said conduit; and • said sleeve co-axially surrounds a portion of said flexible conduit proximate to said adapter.