SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/epa-cylinder-colors

Reusable refrigerant recovery cylinders are identified by which color code?

Yellow and gray.

Start playing free

  1. Red and white
  2. Yellow and gray ✔
  3. Green and blue

Why: EPA's test topics say reusable recovery cylinders must be DOT approved and use the yellow and gray color code. Disposable cylinders must never be refilled.

Huh, didn't know that: EPA's test topics also require cylinder labels showing the refrigerant identification and a DOT classification tag.

The dad joke
The gray and yellow recovery cylinder is a bumblebee with a pressure problem.
Like this card?
Play the game

References

Answer: Yellow and gray. EPA's test topics say reusable recovery cylinders must be DOT approved and use the yellow and gray color code. Disposable cylinders must never be refilled.

  1. Section 608 Technician Certification Test Topics, US EPA www.epa.gov/section608/section-608-technician-certification-test-topics
    know former's yellow and gray color code
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Trades & ShopWhat is the maximum a refrigerant cylinder should be filled, by volume?Trades & ShopA disposable refrigerant cylinder is empty. What should you never do with it?Trades & ShopDOT rules for liquefied gas cylinders say the liquid must never do what at temperatures up to 131 F?

That's stuff everyone should know.