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------------------------------------------------ What is the primary purpose of the cap on a service valve stem?

A. To protect the valve from freezing
B. To prevent refrigerant leaks
C. To indicate the valve position
D. To increase valve durability

The cap on a service valve stem serves primarily to prevent refrigerant leaks, acting as a secondary security measure in the event of valve failure. Their proper use aids in environmental protection and system efficiency.

Explanation:

The primary purpose of the cap on a service valve stem is primarily B. To prevent refrigerant leaks. These caps act as a secondary line of defense in case the valve itself fails to hold the gas.

Having these service valve caps tightly secured can significantly reduce the chance of refrigerant escaping into the atmosphere, thereby contributing to environmental protection and even promoting the efficiency of the system that the valve is a part of.

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