Abstract: A slip type pipe fitting for joining two spaced apart plastic pipe ends is disclosed. The fitting includes: a first insert 12 having an elongate pipe support portion 14, insertable into an internal bore of a first plastic pipe end 11, and a distal end 16 in use projecting outside the first pipe end 11 and having a first annular seal 17; an elongate hollow pipe connector 30 defining a bore 32 and having first and second connector ends 40, 50, the inner bore 32 receiving the distal end 16 and first annular seal 17 of the first insert 12 for sliding movement and sealing therein; and a first compression joining assembly including a first end nut 42 for mechanically joining the first connector end 40 to the first pipe end 11 by a compression action sandwiching the first pipe end 11 between the first end annular member 42 and the pipe support portion 14 thereby locking the connector 30 with respect to the first pipe end 11.