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On a refrigerator or room air conditioner, what is a 'process stub'?

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  1. A built-in pressure relief plug
  2. A short resealable tube that gives access to the refrigerant
  3. A sticker showing the refrigerant type

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References

  1. 40 CFR 82.152 Definitions (Cornell LII) www.law.cornell.edu/cfr/text/40/82.152 Checked 2026-10-10.

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