I'm trying to open the hose fittings on either end of my inhale hose to replace it. I have a hose tool from Narked at 90 to hold the inner fitting, but when I turn the rear collar, it rotates around the hose along with the two half collars underneath it and doesn't unscrew. I can't see any way to hold the two half collars in place to stop them rotating.
Any ideas?