7 Signs Your Scuba Tank Needs Servicing

As a diver, your scuba tank is your life support system underwater. Ensuring it’s in top-notch condition isn’t just good practice—it’s essential for safety. While annual inspections and hydrostatic testing are standard, it’s crucial to recognize signs that your scuba tank may need servicing sooner. Here are seven telltale indicators that it’s time to give your tank some professional attention.

Visible Corrosion or Rust

A quick visual inspection can tell you a lot. If you spot rust or corrosion on the outside—or worse, on the inside—it’s a red flag. Corrosion weakens the tank’s structural integrity, making it a serious hazard. Internal rust, in particular, can contaminate the air supply and compromise your breathing quality.

Damaged or Worn Valve

The tank valve is like the gatekeeper of your air supply. If it’s sticking, leaking, or hard to turn, you’re looking at a potential failure point. Damaged O-rings, seized threads, or worn-out seats can all result in leaks or loss of pressure. Regular lubrication and inspection by a technician can prevent a small issue from becoming a dive-ending problem.

Unusual Sounds or Leaks

If your tank is hissing or making any unexpected noises when filled or in use, don’t ignore it. These could be signs of micro-leaks or valve issues. Using a soapy water solution around the valve and neck area can help detect slow leaks, but any persistent sound warrants a trip to your dive shop.

Expired Hydrostatic Test Date

Every scuba tank must pass a hydrostatic pressure test every five years in most countries. This test ensures the cylinder can safely hold high-pressure air. Check the date stamped on the tank’s neck. If it’s been more than five years—or if the tank has been dropped or mishandled—get it tested immediately.

Inconsistent Pressure Readings

Notice a drop in pressure faster than usual? Your tank might be leaking or not filling correctly. Pressure inconsistencies could point to valve issues or internal damage. Always monitor how long your tank lasts compared to normal use and bring anomalies to a technician’s attention.

Contaminated Air Smell or Taste

Clean air should be tasteless and odorless. If you notice any foul or unusual smells or tastes when breathing from your regulator, your tank may be contaminated. This could be due to oil, moisture, rust, or poor compressor maintenance during the fill. Stop using the tank immediately and have it professionally inspected.

Dents, Dings, or Deformations

Scuba tanks are built tough, but they’re not indestructible. Any significant dent or deformation can weaken the tank and increase the risk of failure under pressure. Even cosmetic damage should be evaluated, especially if it affects the tank’s neck or base.

Final Thoughts

Regular maintenance and awareness are key to scuba diving safety. Don’t wait for annual service dates to give your tank a check-up. If you notice any of these signs, have your tank inspected by a certified technician right away. After all, when you’re 60 feet underwater, the last thing you want is to second-guess your air supply.