These filters are crucial for protecting your reverse osmosis membranes from chlorine in source water. They are replaced typically every 1-2 months, they become a brownish-yellow. These 2.5 x 10 filters fit perfectly into both RNSE systems as well as most Xero systems.
They are also capable of filtering sediment as small as 5 microns.
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Haven’t got the new filter put in but old one worked very well!