US Water Magna Pre-Filter

Sku: 320-USP-MF

Ask a question (3)
Regular Price: $350.00
Sale Price: $209.95
In Stock

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Excellent Filter Life
Filter Down To 5 Microns
Positive O-Ring Seal Prevents Filter Bypass
Commercial Grade Filter System

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Product Description

Product Description

US Watermade in usa

Magna is a Latin word which means “great,” and that is the true and accurate meaning of the US Water Magna Filter. The Magna Filter comes in two sizes: 4.5” x 10” for homes up to 3 bathrooms and 4.5” x 20” for homes with more than 3 bathrooms. This is a true commercial-grade filter.

What Makes The Magna Filter So Great?

  • Magna Seal - It has a positive “o-ring seal” unlike traditional “flat top” filters
  • Magna Media – A 10” filter has 18 square feet of pleated polyester commercial grade media, and a 20” filter has 36 square feet of pleated polyester commercial grade media – compare that to other brand pleated filters which have 30-50% less.
  • Magna Contaminant Capacity – Traps 12 times sediment depth filters, 8 times string wound filters, 2 times other pleated sediment filters.
  • Magna Made in USA – Nothing made outside of the U.S. and conforms to NSF/ANSI 61 Certified by WQA


  • Pre-Filter for Water Softeners and Backwashing Filters
  • Post -Filter ahead of Disinfection System


  • Micron Rating: 5 Microns
  • Media: Pleated Polyester
  • Peak Flow:
    • 4.5” x 10” - 12 GPM
    • 4.5” x 20” - 25 GPM
  • Maximum Pressure: 100 PSID
  • Pipe Size:
    • 12 GPM - 3/4" MNPT
    • 25 GPM - 1” MNPT
  • Maximum Pressure:  90 psi
  • Includes mounting bracket, screws, and housing wrench

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Additional Information

Additional Information

Availability In Stock
Manufacturer US Water Systems
Pre-Filter None
Carbon Filter No
Warranty Filter Housings - 5 Years

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Ratings & Reviews

Ratings & Reviews

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Product FAQs

Product FAQs


Ask a Question

  • Can pressure gauges be mounted in the cap housing like the big blues to tell if filter needs to be changed?

    There is a spot that you can drill, tap and thread a gauge into, but I prefer to put a tee on each side of the filter.

  • The piping in my home is 3/4, can this still be used? Also does the housing allow for pressure gauges to be installed and can a drain port at the bottom be added?

    This filter has 1” male threads.  They can be converted to a ¾” pipe.  Gauges would have to be installed in tee fittings before and after the unit.  There is a pressure relief valve in the top but no drain hole in the sump. 

  • Is this a washable filter?

    You can wash any filter that is not made of paper and this is a polyester filter, so it is indeed washable.