| Shaun,
Have you tried adjusting the two hose connecting nuts either side of the mouthpiece. These are locked in place by small grub screws and need to be reassembled carefully into their original positions. Overtightening these nuts causes them to pinch the O rings and makes turning the mouthpiece difficult. On land try backing off one of these large nuts slightly. If the mouthpiece starts to rotate freely this could be the problem. Do not overdo it or you will create a leak.
I have found the mouthpiece to be the most difficult part of the unit to maintain. I usually need two attempts to get it right every time I strip it down. If all else fails send it back to AP. |