Type III — Low-PressureQuestion 172 of 240
The 25 mm Hg absolute recovery requirement for low-pressure appliances applies to:
a.Only equipment made after 1993
b.All equipment, of any date
c.Only equipment made before 1993
d.Only chillers over 200 pounds
Explanation
Unlike the high-pressure evacuation table, the low-pressure requirement of 25 mm Hg absolute is the same for recovery equipment made before or after November 15, 1993. There is no split based on equipment age or chiller size for low-pressure machines. This single deep-vacuum figure is a heavily tested Type III fact.
Law Reference: 40 CFR §82.156This topic, taught in full in the EPA Section 608 Certification guide. EPA 608 Universal Study Guide (2026) — Core + Type I/II/III, with the 2027 A2L update — PDF + EPUB, $14.99 · 14-day refund →
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Related questions on this topic
- Frequent operation of the purge unit on a low-pressure chiller is usually a sign that:
- 40 CFR §82.152 classifies appliances by their refrigerant's liquid-phase saturation pressure at 104°F. Which range makes an appliance low-pressure?
- Which gas is safe to use, along with a trace of refrigerant, to raise pressure in a low-pressure appliance for leak detection?
- Approximately what inches-of-mercury vacuum reading corresponds to the 25 mm Hg absolute recovery level for low-pressure appliances?
- Non-condensable gases such as air that collect in a low-pressure chiller will:
- Compared with older designs, a high-efficiency purge unit is desirable because it:
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