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Small cans of car air conditioner refrigerant, like R-134a, can be sold to uncertified buyers if they hold at most how much?

2 pounds or less, with a unique fitting and a self-sealing valve.

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  1. 5 pounds
  2. 10 pounds
  3. 2 pounds ✔

Why: EPA exempts small cans designed to hold two pounds or less of car air conditioner refrigerant. They must have unique fittings and self-sealing valves. Uncertified people can buy them for do-it-yourself use on their own vehicles.

Huh, didn't know that: A self-sealing valve on those cans can leak no more than 3.00 grams per year when closed.

The dad joke
What did the little can say to the big cylinder? I may be two pounds, but I'm allowed in the car.
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References

Answer: 2 pounds. EPA exempts small cans designed to hold two pounds or less of car air conditioner refrigerant. They must have unique fittings and self-sealing valves. Uncertified people can buy them for do-it-yourself use on their own vehicles.

  1. EPA Refrigerant Sales Restriction www.epa.gov/section608/refrigerant-sales-restriction
    can continue to be sold to persons without certification for DIY use on their vehicles
    Checked 2026-10-10.
  2. 40 CFR 82.154 Prohibitions (Cornell LII) www.law.cornell.edu/cfr/text/40/82.154
    The leakage rate from each container must not exceed 3.00 grams per year
    Checked 2026-10-10.

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Trades & ShopUnder EPA's sales restriction, who can a seller legally sell refrigerant to for use in equipment?Trades & ShopSomeone picks up refrigerant saying they represent a certified shop. Whose job is it to confirm they are authorized?Trades & ShopHow long must refrigerant sellers keep invoices showing the buyer, the date and the quantity?

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