Having removed the original 3/4 inch connector in the top of the cylinder to replace it with a warix flange for the shower pump (the pump had originally been t'd from the down pipe from the vent and was creating air locks a sa result) the warix flange will not go in and now nor will the original connector! I have tried very carefully to screw either of them but they are both getting too tight to turn before they are water tight......
I guess that the thread has gone in the top of the cylinder...
Does this mean a new cylinder?
Any ideas appreciated