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Under EPA rules, is connecting and disconnecting hoses and gauges to read pressures considered 'opening an appliance'?

No, hooking up hoses and gauges is not 'opening' the appliance.

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  1. Yes, always
  2. No, it is not ✔
  3. Only on systems over 50 lb

Why: EPA defines opening as service that would release refrigerant to the air. Hooking up hoses and gauges to read pressure, add refrigerant or recover it does not count.

Huh, didn't know that: Even so, EPA lists attaching or detaching hoses and gauges as technician work, so it still takes 608 certification.

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References

Answer: No, it is not. EPA defines opening as service that would release refrigerant to the air. Hooking up hoses and gauges to read pressure, add refrigerant or recover it does not count.

  1. 40 CFR 82.152 Definitions (Cornell LII) www.law.cornell.edu/cfr/text/40/82.152
    Connecting and disconnecting hoses and gauges to measure pressures, add refrigerant, or recover refrigerant from the appliance are not considered “opening an appliance.”
    Checked 2026-10-11.
  2. 40 CFR 82.152 Definitions, Technician (Cornell LII) www.law.cornell.edu/cfr/text/40/82.152
    Activities reasonably expected to violate the integrity of the refrigerant circuit include but are not limited to: Attaching or detaching hoses and gauges
    Checked 2026-10-11.

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