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The two most frequent questions service technicians ask about dehydration are... What size vacuum pump should be used to perform a good refrigeration/air conditioning system dehydration job? How long should the pump be left on the system to assure removal Effects Of Pressure and Temperature on the Boiling Points of Water A high vacuum pump is capable of removing all moisture from a hermetic system by reducing internal system pressures to the boiling point of water at normal temperatures. For those being introduced he Factors Affecting The Speed At Which A Pump Can Dehydrate A Refrigerant System Several factors influence the "pumping speed" of a high vacuum pump, and thus the time required to remove all moisture from a refrigerant system. Some of the most important are: the cubic feet of the Moisture In A Refrigerant System While it is important to realize that moisture in a refrigerant system is the underlying cause of most problems and complaints, it is equally important to learn why. Basically, moisture can be cla