I gave 3 stars because it took almost a month to seal. I am sending back the first one I received because the stage 1 and 2 faucet and filter housing were leaking. The replacement manifold was leaking. The manufacturer sent me a new distributor and that fixed the leak. A week later the 1st and 2nd stage filter housings started leaking again. On Oring. I called the manufacturer again and corrected some errors and they ended up sending a new filter housing. Finally yesterday with new parts it no longer leaks. If it weren't for all the manufacturing issues I would have given this a 5 star rating. The water tastes good. This is one of the few products on the market designed to remove PFA. That's why I chose this one. I have a piece of advice: don't screw the filter housing all the way in. Release about 1/4 turn. This seals the ring better. This was announced by a customer service representative from aquasana. Not in the instructions. Much luck.
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