The o- The ring on the scuba water tank exists to create a seal between the scuba water tank valve and the first phase of the scuba regulator. They have similar functions as washers. No these o The small space will exist, and the air will escape through this space. Composition and description of diving tank It looks like a round black rubber ring with the letter \"o. \"Normally they are about 2 cm centimeters to 3/4 in diameter, soft and soft. MaintenanceO- The ring is simple and cheap to maintain. Usually, divers apply a thin layer of silicon coating. After use every few times, based on lubricant to prevent crack formation and maintain o- Soft and soft ring. Replace your o- The ring has been discolored, brittle or cracked, please replace. Tank o- There are many rings in scuba diving shops. Use only fingers or soft metal tools designed for o- Replace the ring, otherwise the device may be damaged. Cause of failure- The ring will naturally degrade with use or exposure to sunlight and salt air. It is recommended that you keep a few fresh ones in the diving kit. You never know when your tank The ring may need to be replaced. O-consequences If your o- The ring fails when diving, which can cause air release in the scuba tank. This can lead to an air emergency that puts divers drowning or at risk of a stress relief disease. The resource article written by Diane Hansen is eager to take risks and likes to share the world in writing. Currently, she is a featured editor of TRAVELHOST magazine and is working on her first novel. She graduated from the University of California, San Bernardino in 2002. A. Business administration major focusing on marketing. She has been writing freelancers since 1996.