Navien Peakflow E replacement filter question

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Jose E

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Hello, I've got an older Navian NPE-240A tankless water heater, and it is using the Peakflow E filtration system. They no longer make the filter (GXXX001726) for this, and so I was wondering if the newer Peakflow S (GWFC110GD001) is a drop in replacement or if I will need to replace the whole entire housing assembly for the new filter?
 
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