It's inside the controls for an inflatable spa. I want to remove that bit of piping and replace it with a longer one. My problem is the grey end bit is firmly wedged in- the pipe (which is 'aquarium hose' so has a bit of flex in it) has been stretched around the fitting to get a snug fit. Is it a question of immersing the end of the hose in very hot water to soften it? Thanks.