well i dont have the white puck thing, so i dont think thats the problem

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After spending most of the day trying to get it to work, I am starting to think there is something wrong with the RO membrane, as its basically the only thing it could be. There is a good amount of water entering the RO unit, the unit is sitting snug into the bottom (the end with the 2 o-rings is down). There isn't supposed to be anything else in the RO canister (ie washer etc) other than the ro membrane itself, correct? I am getting plenty of waste water but NO ro water. arg! any ideas?