Installing a home water filter before or after the water softener?

When installing a whole home water filter, should the filter be located before or after the softener?

My thought was that after the softener would be better because it would remove any salt, impurities, etc introduced by the water softener or it's dirty salt..

What are the pros and cons?

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Installing a home water filter before or after the water softener?

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Mar 02, 2013
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Actually.... they make high flow filters... NEW
by: Anonymous

that only drop 2 psi at 10 gpm. I use a 1 micron 10 inch filter element and it drops a little under 2 psi at 7 gpm. I used to run dual filters, a 10 micron followed by the 5 micron and the drop wasn't really noticeable but the single 1 micron is still better. AND yes the filter should before any treatment apparatus.

Jan 12, 2011
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Pressure problem with filter
by: RJ - H2O Services

Ken, Any pre-filter before water treatment equipment will reduce the water pressure. The finer the micron rating IE: 5,10,20,30 the finer particles it removes. A carbon / taste and odor filter will reduce pressure even more so if it is a carbon block. All pre-filter cartridges should be changed at least every 3 months and the housing sanitized after changing to prevent bacteria contamination. Carbon filters should never be installed before a water treatment system as they can tend to harbor bacteria and potentially contaminate the treatment system.
If you left the filter out and did not have any service problems with sediment in the water treatment system than you may be able to just leave it out.
I hope this helps,
RJ

Jan 07, 2011
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Pressure problem with filter
by: Ken

I have a Sediment, I believe, filter installed prior to my Softener. When initialy installed I had no problem, when I replaced the filter cartridge (with a 10" .5 HD TASTE/ODOR / SED Cartrige W.5CBHD) I slowly started to loose pressure,the line would really drop when the toilet was flushed. I again replaced the filter cartridge after 6 months and had the same problem immeadiatly. After a few months I removed the filter cartridge and replaced it with nothing, no cartridge. Plenty of pressure and no drop in pressure when toilet is flushed or clothes washer is filling. What's happening here????

Nov 20, 2010
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Installing home water filter
by: Mat

If the whole home water filter is a carbon water filter, it should be installed before the water softener. VOC's like chlorine, chloramines, and other chemicals oxidize the resin in the softener. A carbon filter WILL NOT remove salts and other dissolved solids from the water. A reverse osmosis water purifier is required to remove additional dissolved solids.
If your whole house water filter is a sediment filter, it should be installed pre water softener to help remove dirt and sediment above 20 microns.

Matt Ulrich
Clear Water Concepts
Mesa, AZ

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