So I was rerouting a 2" pvc vent and broke it at a 45 degree fitting at the slab level. Was trying to union a 4' new section between two cut sections and of course the 2" does not bend enough to get one end into the union. Question, how does one union a section between two older ones? On the net I saw a telescoping coupling. Would this do the trick and within code? I'm going to dig out the 2" drain stub to attach a new 45 but will still face inserting a new section above the slab. Any assistance is greatly appreciated.