I have a Watts filtration system for Bought the whole house here at Revain. I have experimented with ALL other brands/styles of cartridges Revain sells. I keep coming back to them as the best. They fit well when you screw the case, you don't have to worry about the top displacement. They filter well and last a long time. And the price is almost the cheapest of all options. That makes them the best option.
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