What gets tested · Core
Recover, recycle and reclaim on the EPA 608
Recover, recycle and reclaim are three separate steps on the EPA 608: recovering takes refrigerant out and stores it, recycling cleans it in the field for reuse, and reclaiming reprocesses it to a purity standard that a lab analysis confirms. The Core expects you to keep the three apart, to know which recovery equipment is allowed where, and to know what makes recovery fast or slow.
Three verbs the exam won't let you blur
Recycling isn't a lighter, do-it-yourself version of reclaiming, whatever shop shorthand suggests. Reclaiming means reprocessing to the AHRI 700 specification and verifying it by analysis (40 CFR 82.152, eCFR as of October 5, 2026), and only refrigerant reclaimed by a certified reclaimer may be sold to a new owner (40 CFR 82.154(d), eCFR as of October 5, 2026). Recycled refrigerant has met no purity standard at all, so it never qualifies.
Recovery equipment has its own rule. System-dependent equipment, the passive kind that relies on the appliance's own compressor or pressure, isn't allowed on appliances holding more than 15 lb of refrigerant unless a pump-out unit is permanently attached (40 CFR 82.152 and 82.156, eCFR as of October 5, 2026). The difference between passive and self-contained units is on the system-dependent recovery page.
Low-pressure chillers add their own steps
Type III recovery goes further: recover the vapor after the liquid, heat the oil to 130 °F before removing it, and circulate or drain the chiller water so the tubes don't freeze as pressure drops (EPA test topics, Type III, checked October 7, 2026). The section is mapped on the Type III section page.
The three Rs side by side
Recover, recycle and reclaim compared on process, standard and resale
| Item | Recover | Recycle | Reclaim |
|---|---|---|---|
| What happens | Refrigerant is removed into an external container; nothing is cleaned | Contaminants are reduced with field equipment | Refrigerant is reprocessed to a set specification, and analysis proves it |
| Purity standard | None | None | AHRI 700 |
| Who does it | A certified technician | A certified technician | A certified reclaimer |
| Sold to a new owner | Not allowed | Not allowed | Allowed |
Yellow edge: at least one column differs from the others on this row.
Definitions: 40 CFR 82.152; resale: 40 CFR 82.154(d), with narrow exceptions for motor-vehicle AC recycling, refrigerant still inside an appliance, and parent-subsidiary transfers (eCFR as of October 5, 2026).
What speeds recovery up
Move liquid first
Recovering liquid before vapor moves the bulk of the charge fastest (EPA test topics, Type II, checked October 7, 2026).
Help the pressure difference
Chilling the recovery vessel keeps refrigerant flowing toward it (EPA test topics, Type II, checked October 7, 2026).
Wait at the finish
After reaching the required vacuum, wait a few minutes and watch for a pressure rise; refrigerant still dissolved in the oil shows up that way (EPA test topics, Type II, checked October 7, 2026).
Sort the three Rs
Definitions come first, then equipment and procedure. Read each stem to the end before choosing; several turn on a single word.
0 right · 0 of 15 answered
Identify the process that involves cleaning refrigerant to meet the standards of new (virgin) refrigerant after being tested by chemical analysis.
Why each option is right or wrong
Answer: C. Reclaiming
- ARecovery only removes refrigerant and stores it; it involves no cleaning or lab test.
- BReuse is not a defined EPA process; refrigerant can go back into the same owner's equipment, but that is not cleaning to new-refrigerant purity.
- CCorrect: reclaiming reprocesses refrigerant to new-product purity (AHRI 700), verified by chemical analysis.
- DRecycling cleans refrigerant with oil separation and filter-driers, but does not bring it to new-product purity or require lab analysis.
Reclaiming means processing used refrigerant to the purity of new (virgin) refrigerant, verified by chemical analysis.
What is the difference between recovery and recycling of refrigerant from small appliances?
Why each option is right or wrong
Answer: C. Recovery is removing refrigerant from an appliance; recycling involves cleaning it for reuse
- ARecovery is required when service or disposal would otherwise release refrigerant; recycling is optional.
- BBoth terms apply to all refrigerants; the difference is the processing, not the refrigerant family.
- CCorrect: recovery means removing refrigerant and storing it; recycling adds cleaning (oil separation, filter-driers) for reuse in the same owner's equipment.
- DPassive and self-contained methods are both ways to recover; they do not separate recovery from recycling.
Recovery is simply removing refrigerant from an appliance, while recycling involves additional processing to clean the refrigerant for reuse. Recovery is the minimum requirement, while recycling is an additional step that may be performed.
Which of the following correctly describes the process of 'recycle' according to EPA definitions?
Why each option is right or wrong
Answer: D. Cleaning recovered refrigerant through oil separation and filter-driers to reduce contaminants
- ARestoring refrigerant to new-product purity, verified by analysis, is reclaiming, not recycling.
- BStoring refrigerant describes recovery, and has nothing to do with EPA inspections.
- CDisposal or destruction is a different fate for refrigerant; recycling cleans it for reuse.
- DCorrect: recycling cleans recovered refrigerant with oil separation and filter-driers to reduce moisture, acid and particles, without lab analysis.
According to EPA definitions, 'recycle' means to extract refrigerant from an appliance and clean it by oil separation and single or multiple passes through filter-driers to reduce moisture, acidity, and particulates. Unlike reclamation, recycling is typically performed on-site without rigorous chemical analysis.
What is a fundamental environmental objective behind the EPA's strict recovery and recycling rules for refrigerants?
Why each option is right or wrong
Answer: C. To reduce the release of ozone-depleting substances into the atmosphere.
- AWrong: recovery and recycling add time and equipment to a job, so lowering service cost isn't their purpose.
- BWrong: the rules don't require one refrigerant type for every system; they govern how refrigerant is handled.
- CCorrect: the recovery and recycling rules exist to keep ozone-depleting refrigerants, and their substitutes, out of the atmosphere.
- DWrong: system efficiency is not what the recovery rules regulate; their target is emissions.
The objective is to lower the potential release of ozone-depleting substances and reduce overall environmental damage.
What is required of recovery equipment used for HCFC refrigerants according to EPA standards?
Why each option is right or wrong
Answer: B. Certification to meet specific efficiency standards and testing by an EPA-approved laboratory
- AAutomatic refrigerant identification is not an EPA requirement for recovery equipment.
- BCorrect: recovery equipment must be tested by an EPA-approved laboratory and certified to meet EPA's performance standards, such as the required vacuum levels.
- CEPA does not inspect recovery machines each year; equipment is certified by approved testing organizations.
- DNo machine is required to handle all refrigerants, let alone at once; mixing refrigerants is to be avoided.
EPA standards require recovery equipment used for HCFC refrigerants to be certified to meet specific efficiency standards for vapor recovery and tested by an EPA-approved laboratory. The equipment must be capable of achieving required vacuum levels based on the appliance type.
A technician builds a custom recovery rig for small appliances using off-the-shelf vacuum pumps and steel storage tanks. Why can't this rig be used for recovery under Section 608?
Why each option is right or wrong
Answer: A. It lacks certification from an EPA-approved testing laboratory.
- ACorrect: recovery equipment must be certified by an EPA-approved testing organization (such as AHRI or UL), and a homemade rig is not.
- BThere is no rule requiring a secondary particulate filter on recovery equipment.
- CBeing built for deep vacuum is not the violation; the problem is that the rig was never certified.
- DNo rule requires an external heat source on recovery equipment.
Under the Section 608 rules, recovery equipment must be certified by an EPA-approved testing organization (such as AHRI or UL) as meeting EPA's performance standards. A home-built rig has no such certification.
A technician attempts to recover R-410A using a self-contained recovery machine rated only for R-22. What is the primary consequence of this equipment mismatch?
Why each option is right or wrong
Answer: B. Equipment failure due to excessive pressure
- AThe oil does not suddenly vaporize; the issue is that the machine is not built for R-410A's pressure.
- BCorrect: R-410A runs at much higher pressure than R-22, so a machine not rated for it can be over-pressurized and fail or release refrigerant.
- CR-410A and R-22 are not flammable and do not combust spontaneously.
- DHigher pressure pushes outward; it would not cause a cylinder to implode.
R-410A operates at significantly higher pressures than R-22. Using a recovery machine not rated for these pressures can lead to equipment failure or accidental venting.
What is the required recovery/recycling equipment certification for servicing high-pressure appliances?
Why each option is right or wrong
Answer: B. Certification by an EPA-approved testing organization
- AManufacturer self-certification is not accepted; testing must be done by an EPA-approved organization.
- BCorrect: recovery and recycling equipment must be certified by an EPA-approved testing organization.
- CNo date exempts recovery equipment from certification; 2010 relates to the R-22 phaseout, not equipment.
- DLocal authorities do not certify recovery equipment, and EPA requires no annual inspection.
Equipment used for recovering or recycling refrigerant from high-pressure appliances must be certified to meet EPA standards by an EPA-approved testing organization, which ensures it can achieve required evacuation levels.
Which of the following statements about recovery equipment maintenance is correct?
Why each option is right or wrong
Answer: B. Filters should be changed regularly to prevent contamination between different refrigerant types
- AWaiting for failure lets contaminants and clogged filters slow recovery and spread to other systems.
- BCorrect: change filters regularly, especially after a burnout and when switching refrigerants, so contaminants are not carried from one job to the next.
- CNo recovery machine is maintenance-free; filters, oil and hoses need regular care.
- DRoutine maintenance such as filter changes is done by the technician, not only by the manufacturer.
Recovery equipment requires regular filter changes to prevent contamination between different refrigerant types and to maintain efficiency. Clogged filters can slow recovery rates and damage equipment.
What step must be taken before connecting a recovery machine to a refrigeration system?
Why each option is right or wrong
Answer: B. Check if the recovery machine is compatible with the refrigerant type
- ACO2 is never used to purge a refrigeration system before recovery.
- BCorrect: confirm the recovery machine is rated for the refrigerant (and its pressure) before connecting.
- CAmbient temperature affects recovery speed, but checking it is not the required first step.
- DThe cylinder does not have to be empty; it must be one used for the same refrigerant, with room left under the 80% limit.
Before connecting a recovery machine to a refrigeration system, a technician must check if the recovery machine is compatible with the refrigerant type. Using the wrong equipment can cause cross-contamination, equipment damage, or ineffective recovery.
What is the first step in proper refrigerant recovery procedure?
Why each option is right or wrong
Answer: C. Identify the refrigerant type
- AConnecting equipment comes after you know which refrigerant you are dealing with.
- BOpening valves before identifying the refrigerant risks mixing and using the wrong equipment.
- CCorrect: identify the refrigerant first so you choose the right machine and a cylinder for that refrigerant and avoid mixing.
- DA vacuum pump is used for evacuation after recovery, not as the first recovery step.
Identify the refrigerant first: it decides which recovery machine, cylinder and procedure you use, and it prevents cross-contamination.
A recovery unit stalls during vapor pumpout due to high-pressure cutouts. Which combination of factors most likely caused this protective shutoff?
Why each option is right or wrong
Answer: A. High ambient temperatures and a restricted recovery cylinder.
- ACorrect: high ambient heat and a restricted or overfull recovery cylinder raise the discharge pressure until the recovery unit's high-pressure cutout trips.
- BCold surroundings and an empty cylinder lower pressure and make tripping a high-pressure cutout less likely.
- CA partly open rupture disc would vent refrigerant from the chiller, not raise the recovery unit's discharge pressure.
- DSubcooling at the expansion valve is an operating condition of the chiller, not a cause of recovery-unit cutout trips.
High ambient temperatures elevate recovery cylinder pressures. Combined with restriction or overfilling, this easily triggers the recovery machine's high-pressure cutout, stalling the vapor pumpout process.
During recovery on a dual-circuit chiller, a technician manifolds an R-22 circuit directly with an R-410A circuit. What is the primary consequence of this procedural error?
Why each option is right or wrong
Answer: C. Irreversible cross-contamination
- APressure spikes are not the main result; the lasting harm is a mixed refrigerant.
- BCondenser heat transfer is not the issue during recovery; mixing ruins the refrigerant itself.
- CCorrect: manifolding two refrigerants mixes them, and the mixture cannot be reused or easily separated and needs special handling.
- DFlashing of liquid is a normal pressure effect, not the consequence of mixing two refrigerants.
Manifolding different refrigerants and oils together causes irreversible cross-contamination. This ruins the recovered refrigerant and compromises the lubrication properties of both circuits.
What should be done if multiple small appliances with different refrigerant types need service?
Why each option is right or wrong
Answer: D. Use separate recovery cylinders for each refrigerant type
- AMixed refrigerants cannot be separated in the field and may be impossible to reclaim.
- BVenting any refrigerant is prohibited, regardless of charge size.
- CRecovering in order of boiling points still mixes them if they go into the same cylinder.
- DCorrect: keep each refrigerant in its own recovery cylinder so none get mixed.
Different refrigerant types should never be mixed as this creates a contaminated mixture that is expensive to separate and may be impossible to reuse. Each refrigerant type must be recovered into its own dedicated cylinder.
A contractor recovers R-22 from a customer's rooftop unit that is being replaced. Which use of that refrigerant is allowed without sending it to a certified reclaimer?
Why each option is right or wrong
Answer: D. Charging another unit owned by the same customer
- ASelling used refrigerant requires reclamation by a certified reclaimer before it is resold.
- BThe buyer's certification does not matter; the refrigerant must be reclaimed before it changes owner.
- CRecovered refrigerant sold to a new owner must first be reclaimed to AHRI 700 purity.
- DCorrect: recovered refrigerant may go back into equipment owned by the same owner without reclamation.
Recovered refrigerant may be returned to the same appliance or to other appliances owned by the same owner. If it is sold to someone else, it must first be reclaimed to the AHRI 700 standard by a certified reclaimer.
More practice across all four sections: Practice test · Timed mock
When the charge isn't what the label says
Edge cases
Can a technician reclaim refrigerant on site?
Reclaim requires reprocessing to AHRI 700 purity verified by analysis (40 CFR 82.152, eCFR as of October 5, 2026), the job of a certified reclaimer. A recovery or recycling machine on the truck recovers and recycles; it doesn't reclaim.
Which vacuum level counts as finished recovery?
It depends on the appliance type, its size, and when the recovery machine was made. Small appliances have their own rule (40 CFR 82.156(b), eCFR as of October 5, 2026), explained on the 80/90% recovery rule page; larger systems follow the evacuation table (40 CFR 82.156(a), eCFR as of October 5, 2026) on required evacuation levels.
What records follow recovery at disposal?
When a technician disposes of an appliance holding 5 to 50 lb of refrigerant, the technician keeps a record of the recovery for three years (40 CFR 82.156(a)(3), eCFR as of October 5, 2026). Small appliances work differently: the final processor, such as a scrap recycler or landfill, either recovers what's left or collects a signed statement that it was recovered, with the name, address and date (40 CFR 82.155(b), eCFR as of October 5, 2026).
Where does this topic sit on the exam?
The three Rs are a Core topic, and recovery technique shows up again in Type I, II and III (EPA test topics, checked October 7, 2026). The rest of Core is mapped on the EPA 608 Core section page.