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The microns rating is how small of particles the filter will remove, so a 1 micron filter will remove particles larger then 1 micron. The 1 micron will technically remove a bit more sediment but in most circumstances that isn't a major benefit. The 5 micron is the better choice more often then not because it won't clog as fast.
Many cartridges claim to be depth filters. But to be a true depth filter, a cartridge must be able to retain contaminants throughout the entire cross section of the filter.
A graded density allows larger particles to be trapped near the surface while smaller particles penetrate the larger open areas to be trapped nearer the center of the filter in the smaller openings. Without graded density, a so-called "depth" filter will operate in practice only as a surface filter. The Purtrex filter has the graded density that is required to be a real depth filter.
The Purtrex depth filter is an exceptional value for general applications where long life, high purity and low change-out frequency are required. Produced through GE Osmonics patented melt blown micro fiber technology, Purtrex is a 100% pure polypropylene depth filter with exceptional dirt-holding capacity. Purtrex true-graded density filter matrix (lower density at the surface of the filter with progressively higher density toward the center) captures particles throughout the entire filter depth. This translates to longer life and fewer change-outs than existing string-wound or resin-bonded filters.
Purtrex contains no wetting agents, solvents, anti static agents or binders, and meets the requirements of the FDA for food and beverage contact. The filter incinerates to trace ash for easy disposal.
As always BRS products - Great! By Ken on 1/24/2017Ken would recommend this product to a friendNo trouble, just works!
they work By paul on 10/18/2016paul would recommend this product to a friendthey work as expected
Great By Brofish on 9/3/2016Brofish would recommend this product to a friendClearly a superior product
Great Product! By Eric on 8/15/2016Eric wouldn't recommend this product to a friendBRS Filters work great!!!
great filter By paul on 6/28/2016paul would recommend this product to a friendit works well .affordable . all around good filter
Great Product, Reasonable Price! By Eric on 5/12/2016Eric would recommend this product to a friendCan't beat the combination of BRS quality on filters and their pricing.
Great Sediment Filter By Steve D on 3/21/2016Steve D would recommend this product to a friendI usually change mine very 2 or 3 DI cartridge changes and it works great. It will start to shade brown when its time to change. It works well with the BRS RODI units.
Works Great By Brett on 3/6/2016Brett would recommend this product to a friendBeen using this filter on my BRS RO/DI unit for the last 6 months. Working great so far.
Very good filter By Dave on 2/23/2016Dave would recommend this product to a friendWill recommend to anyone looking for good filters
Best Sediment Filter! By Tony on 1/13/2016Tony would recommend this product to a friendDoes a better job and lasts longer than any other brand I have tried!
Great filter, great price By MandM on 1/3/2016MandM would recommend this product to a friendAt this price, it's easier to change out the sediment filters often and save the carbon blocks from clogging up.
Good sediment pre filter By Cap on 11/17/2015Cap would recommend this product to a friendOnly product I use, A+