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Where reverse osmosis water filtration system is connected to a cold water supply of 40 - 60 psi minimum to reverse osmosis system (2.8 kgf/cm2 - 4.2 kgf/cm2 or less than 2 - 3 seconds to fill a cup of 7 oz capacity) If the water pressure from the reverse osmosis system is less than 20 psi or 138 kPa or 1.4 kgf/cm2 (takes more than 4 seconds to fill a cup of 7 oz or 198 cc capacity). ^Daphane
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