AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/epa-low-pressure-25-mm-hg

What evacuation level must be reached for a low-pressure appliance?

Start playing free

  1. 10 inches of mercury vacuum
  2. 0 psig
  3. 25 mm Hg absolute

🔒 The answer is for AhaBulb members. Members see the answer, why it's right and the official sources for every card of Stuff Every HVAC Tech Should Know, plus timed practice exams.

The first 50 cards of every test are free to play.

Play the free cards See membership

Like this card?
Play the game

References

  1. 40 CFR 82.156 Required practices (Cornell LII) www.law.cornell.edu/cfr/text/40/82.156 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 & ShopWhy do techs evacuate a system with a vacuum pump at the end of service?Trades & ShopInstead of recovering a percentage, a technician can evacuate a small appliance to what vacuum?Trades & ShopMedium-pressure appliance under 200 lb, recovery equipment made after November 15, 1993. Evacuate to how many inches of mercury vacuum?

That's stuff everyone should know.