There is no specific part #.
Pretty much any 10" cartridge filter works. Lots to chose from.
This is what I've been using.
The more they filter out, the less flow you are going to get.
Try to find a balance. https://www.amazon.ca/Pentek-CFB-PLU.../dp/B007IBWWN2
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2016 North Point 341RLTS
520watts of solar. Morningstar MPPT
4 6volt 235ah Surrette batteries
2017 F-350 Platinum CC SRW
I couldn't get the link to work, it copied the "..." into the link. I already ordered the one Klassic sent, the one that came with the camper lasted us 5 months, which was pretty good. I'll let you know if this one is better than the one that came with our unit.
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2017 North Point 377RLBH
2011 Silverado 2500HD 6.6L