Scuba gear maintenance and post-dive care is very important to avoid harming your equipment. Both salt water and chlorinated swimming pool can damage your scuba kit. When you finish your dive, you need to disassemble your gear for rinsing and storage.
First, turn off the scuba cylinder air by turning the valve gently clockwise until it completely stops - clockwise close. Next, push the purge button on the regulator to release all of the pressure inside the hoses. If you forget this procedure, the high-pressure will make it impossible to remove it from the valve assembly.
Next, disconnect the low-pressure inflator hose from the BCD, and then unclip the submersible pressure gauge and alternate air source from their holders. Remove the regulator by loosening the yoke, or unscrewing the DIN, being careful to keep the water from dripping into the high-pressure inlet on the first stage. Dry the regulator dust cap with a towel and firmly replace the cap.
Wrap and secure the BCD straps so they won't drag and tangle. Release the cylinder band off the BCD. Lay the scuba tank down so it can't fall over while you rinse all of the equipment with fresh water. This is even important after a pool dive because chlorine can harm your gear as much as salt water can.
Scuba Regulators maintenance
After each use, rinse your regulator with rest of your equipment. While it is still attached to your scuba cylinder, it is often better to soak it, and then rinse it with clean running water. If you rinse it after removal from the tank, keep these important points in mind.
1) Put the first stage dust cap firmly in place to keep water out of the first stage
2) Do not use high pressure water to rinse your regulator - only gently flowing water
3) Don't press the purge button while rinsing or soaking, because this opens the second stage inlet valve, which can allow water to flow up inside the hose to the first stage
You may prefer to rinse your regulator while attached to the cylinder with the valve open. By doing this, there is no way that water will accidentally enter the valve and the first stage. Rinse thoroughly by flushing fresh water through any holes in the first stage (except the high-pressure inlet covered by the dust cap) and through the second stage mouthpieces. Keep the first stage higher than the second stage to minimize the possibility that water will flow up the hose to it. It is advisable to attach the regulator to the scuba cylinder after rinsing and briefly purge once more to blow out any water that may have entered the first stage accidentally.
Keep your regulator free of sand, mud, and debris. To prevent damage to the hoses when storing or packing, allow the hoses to form large gentle curves rather than tight loops. Do not use hoses to pull or handle your scuba unit. It is generally better to store your regulators laying flat than hang it by one of the stages or hoses.
Your regulators require periodic lubrication, inspection, and adjustment to assure that it operates reliably. Therefore, an important part of regulator maintenance includes professional servicing at least once a year or sooner if it begins to breathe hard or leak. The manufacturer's specifications may also recommend more frequent servicing of your regulator. With proper maintenance and annual servicing, your regulator should provide you with many years of dependable service.