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can anyone recommend the best cheapest filters and UV sterilizer?

Posts: 214
Location: Kachemak Bay, Alaska (usda zone 6, ahs heat zone 1, lat 59 N, coastal, koppen Dfc)
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I am setting up a potable rainwater catchment system for a client. i have a plan for transferring water around and i want to achieve 1 micron filtration and flow through a UV sterilizer before it enters the in house holding tank. what I'm looking for in the UV unit is :
# 1: 4gallons per minute or higher,
#2 : pex or poly compatible (dont want to deal with copper)(i think they're mostly npt anyway...)
#3: it actually works
#4 lowest price

any recommendations?
and how about filtration down to 1 micron?
i'm looking for the right balance of cost and longevity
Posts: 59
Location: The Hague; Morocco asap
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Joe Blankenship says magnetite [but not black sand] does an amazing job.
A cheap option you can use yourself by ordering some magnetite.
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