Why do technicians use low-loss fittings on their hoses?
Refrigeration · EPA 608 Core. The correct answer, and the reasoning behind it.
The refrigeration cycle, refrigerant states and pressures, gauges and leak detection.
The question
Why do technicians use low-loss fittings on their hoses?
- To filter moisture out of the refrigerant as it flows
- To make hoses connect faster
- To cut refrigerant loss when hoses are disconnectedCorrect answer
- To raise the pressure rating of the hose
Why “To cut refrigerant loss when hoses are disconnected” is correct
40 CFR 82.152 defines a low-loss fitting as one that closes automatically or manually when disconnected, minimizing refrigerant released from hoses, appliances and recovery machines. It keeps the trapped hose charge from escaping.
Source: 40 CFR 82.152
Why the other answers are wrong
- To filter moisture out of the refrigerant as it flows — Fittings do not filter moisture; filter-driers do.
- To make hoses connect faster — Speed of connection is not the purpose.
- To raise the pressure rating of the hose — The fitting does not change the hose pressure rating.
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