EPA Section 608 Universal Certification ExamType II (High-Pressure Appliances)Hard
A technician is preparing to recover refrigerant from a high-pressure appliance. To minimize refrigerant loss during hose connection and disconnection, what specific type of valve should be used?
- ALow loss fittings
- BGate valve
- CSchrader valve
- DBall valve
Show answer & explanationAnswer & explanation
Correct answer: A. Low loss fittings
EPA regulations specifically mandate the use of low loss fittings (also known as self-sealing hoses or shut-off valves) on all recovery devices and vacuum pumps to minimize refrigerant release during connection and disconnection of hoses. While Schrader valves are common service ports, low loss fittings are the active mechanism to prevent loss at the hose ends.
Why the other options are wrong
- B. Gate valves are for flow control and isolation, not for minimizing connection/disconnection losses.
- C. Schrader valves are service ports on the system, but the question refers to the hose fittings themselves to prevent loss.
- D. Ball valves are used for isolation but are not designed for minimizing loss during hose connection/disconnection.
Low Loss Fittings
Low loss fittings are mandated by EPA regulations for use on recovery equipment and vacuum pumps to prevent refrigerant release during the connection and disconnection of service hoses.
- EPA mandated.
- Minimize refrigerant loss.
- Used on hoses for connection/disconnection.
Memory trick: Low loss fittings are the 'seal' for hose transitions, preventing refrigerant 'leaks'.