The general rule of thumb for regulator servicing is every two years or 100 dives, whichever comes first.
However, many divers overlook the importance of having their regulators inspected after a dive holiday or extended trip. These adventures often take you to remote destinations where dive centers may struggle to maintain compressors and cylinders to the highest standards. This can result in rust, water, or even oil contaminating your regulator.
We’ve recently seen an increasing number of scuba regulators brought in for servicing with complaints of breathing difficulty or free-flow issues following dive trips. Upon inspection, it’s often clear that these regulators were used on tanks with rust or water contamination—issues exacerbated by less frequent cylinder maintenance.
In South Africa, for example, a change in regulations now requires visual inspections every two years instead of annually. While convenient, this can result in more cylinders with internal contamination remaining in circulation, particularly in remote dive locations.
 Corrosion on a valve from water in scuba cylinder |
This is a growing concern. Cylinders contaminated with rust or water can cause serious equipment issues and pose potential health risks. If you suspect contamination, it’s vital to report it to the dive center immediately so the cylinder can be tested, cleaned, and removed from circulation before it endangers the next diver.
Be Proactive: Test Cylinders Before Use
Here are a few simple steps to identify potential cylinder contamination:
 Water and rust squirting out of a contaminated scuba cylinder |
- Check for water: Turn the cylinder upside down and slowly open the valve. If water comes out, do not use the cylinder.
- Listen for movement: Hold the cylinder horizontally and tilt it side to side. If you hear sloshing or objects rolling inside, avoid using it.
- Request an air purity test: Ask the dive center or fill station for their latest air purity test results, which should be within the last 12 months.
What If You’ve Used a Rusted Tank?
If you suspect you’ve inhaled contaminated air—such as water or rust particles from a rusted tank—contact your local DAN (Divers Alert Network) office immediately or seek medical attention. Prompt action is essential to ensure your health and safety.
Keeping your gear in top condition doesn’t end with regular servicing. A post-trip inspection can help prevent equipment issues and ensure safe, enjoyable dives every time
 Comparing a new filter to one that has been used with a rusty tank |
Not Sure If You’ve Had a Dirty Cylinder?
Bring your scuba regulator to us after your dive trip or holiday, and we’ll perform a quick inspection (free of charge) to ensure your regulator is clean and ready for your next dive. Should your regulator require servicing, we can provide you with a detailed quote or expert advice to get it back in top condition.
Regular checks and servicing not only extend the life of your equipment but also ensure your safety and enjoyment on every dive. Stay proactive and dive with confidence!
