So I got a dive rite SMB from my local dive shop (dudas diving duds in west Chester pa) I used it during my AOW class a few months ago. The first one I had, the dump valve broke off the first time I pulled the string. The threads snapped. The dive shop replaced it for me. They gave a new one. I took it on two dives since getting the replacement a few month ago. I used it one the second dive and my brother pulled the string on the dump valve and it broke at the same spot. Is this a know problem? Can I send it back for repair?