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Where is the outlet of the 3m central water purifier?

On the reverse osmosis membrane. Open the ro membrane shell and look at the water outlet inside. Near the middle, there is a cylinder (the black leather ring on the ro membrane is stuck on it) as the water outlet. Installing 3M fine filter in household water pipes can effectively remove all kinds of large-particle impurities that may exist in tap water and improve the water quality of the whole house.