This is the third Watts Premier system I have installed. I am still very satisfied with the design, the ease of installation and the quality of both the product and the water produced. The ease of replacing the cartridge is the reason I keep buying this unit (I must add, for different households). The only thing is the bends Watts puts in the plastic tube. Many years ago my first system had a leak problem as the heat used to bend the tube caused it to become oval and the o-rings did not seal properly when the tubes were inserted into the back of the unit. I wrote to Watts and subsequent installations went smoothly.
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