Since January 1, 2018, a person buying a 30-lb cylinder of R-134a for vehicle A/C service must
- hold a state business license only
- sign a statement that it will not be vented
- be a certified technician or employ one
- be at least 21 years of age
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C. be a certified technician or employ one
The sales restriction that once covered only ozone-depleting refrigerants was extended to substitutes such as R-134a in 2018. Sellers must verify Section 609 (or 608) certification for containers other than exempt small cans.
Reference: 40 CFR 82.154(c)
Which container of R-134a may be sold to a person who is not a certified technician?
- A cylinder of 30 lb or less with a standard valve
- A can of 2 lb or less that has a self-sealing valve
- Any container, if the buyer shows a driver's license
- A can of any size bought through an online seller
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B. A can of 2 lb or less that has a self-sealing valve
The do-it-yourself exemption covers only small cans (2 lb or less) of MVAC refrigerant fitted with a self-sealing valve. Larger containers require certification however they are sold.
Reference: 40 CFR 82.154(c)(1)(ix)
What is the purpose of the self-sealing valve required on small cans of vehicle refrigerant?
- It seals the can when the hose is removed
- It prevents the can from being used on R-1234yf systems
- It measures how much refrigerant has gone into the vehicle
- It stops the can from being filled above 80 percent
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A. It seals the can when the hose is removed
Older puncture-type cans emptied to the air once the hose came off. The self-sealing valve keeps the unused portion in the can, reducing emissions from do-it-yourself charging.
Reference: 40 CFR 82.154(c)(2)