A Comparison of Whole House Water Filtration Systems
Compare Whole House Water Filters
Home Water Filtration System Comparison & Ratings
People often ask me to compare whole house water filters and I tell them I am reluctant to do so. The reason is that direct comparisons are tough and some statements are intended to be misleading. In the chart provided below I provide a comparison of whole house water filtration systems be selecting four relatively well known competitors and listing selected criteria.
On this page I provide a comparison of whole house water filtration systems to my Urban Defender whole house water filter. This home water filtration system comparison lists two well known backwashing systems, one well known cheap alternative, and the most costly filter on the market.
The problem with estimating gallon capacity is that water quality will vary in every city and how long a system will last depends entirely on the level of chlorine in the water along with the levels of other contaminants.
The amount of KDF and carbon and other media or the type of carbon used are also factors. In this comparison I am using 2 mg/l of chloramine in city water and catalytic carbon as the media to derive the numbers provided.
What is misleading about the NSF 42 certified systems is that they have been tested to the gallons listed but only have to remove 50% of the chlorine or chloramine to gain certification. Real life residential application will not result in the volumes they claim. My estimate is an attempt at a real number.
I assume a 12 year life with one media change at 6 years. The Urban Defender could easily be used again and that would lower the cost further. Big company claims a 16 - 20 year life. This is a false claim. Since both systems use similar media one would have to evaluate the contaminant levels upon which big company bases this claim.
The Urban Defender whole house water filter uses NSF certified media. Big company is certified for NSF 42 Aesthetic Effects, which basically means that it removes some chlorine. Big company's removal claim for gallons is for half of the chlorine or chloramine in your water.
Systems that do not backflush are subject to decreased effectiveness in a short time. I have considered manufacturing such a system but can't bring myself to do so. Ask me why backwash carbon systems are more effective than upflow systems.
As I stated above, how long the media within a system will last depends on the level of contaminants as well as the amount of water used. In this case I assume a 10 year life for the purpose of comparison.
All performance claims and pricing are based on the Manufacturer’s or Authorized Distributor’s literature.
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