Whirlpool WHEERF UltraEase Replacement Prefilter And Postfilter

• Whirlpool UltraEase WHEERF
• Replacement Prefilter And Postfilter
• WHER25 Reverse Osmosis System
• 2-Pack Includes Replacement Battery
• 7276327. Code: 07255

I''m no expert and what I write below is based on experience and some reading on the subject.

The timer built into this product is a nice reminder to check the quality of the water being produced by the system but doesn''t necessarily mean the filters need to be replaced.

The pre-filter removes sediment and reduces chlorine in the water that is harmful to the membrane. If you are on city water then you probably don''t have much sediment but you''ll likely have chlorine. If the filters aren''t replaced frequently enough, then the chlorine may destroy the membrane. If you are on well water like I am, then the pre-filter is mainly removing sediment from the water.

The membrane will last a long time if the pH is low and no chlorine gets to the membrane from a depleted pre-filter. So, if you have low pH and low sediment you may get substantially more time out of your filters and membrane than the manufacturer would lead you to believe.

The timer is designed around a set of averages or best guesses by the designers of the system. If you are more sophisticated than the average consumer and own test equipment then you can replace the filters based on need rather than the timer.

A cheap TDS meter and chlorine test kit is about all you need to get started. This will allow you to combine your own judgment and experience with scientific measurements to minimize your cost of ownership of this unit.

As I mentioned, I''m on a well. My pH is low and I have a whole house sediment filter. I am just replacing my pre/post filters after 16 months and my TDS out of the system is < 1 so the membrane is still good and doesn''t need replacing yet. Truthfully, I''m only replaceing the filters because my wife wants me to. LOL.

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this fit my water filter perfectly and worked well. dont forget to follow the purge/sanitize instruction for the RO system

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I have found the percentage of contaminants the WHER25 removes from tap water to vary considerably. I have a PPM dissolved solids meter from our ZeroWater filter. That meter shows our (Austin, TX) raw tap water to have, typically, between 185 and 205 PPM contaminants. The WHER25-filtered water this time around is coming out at ~50PPM. Most of the time, I see it at around 15PPM. It appears that this time around, the filters aren''t doing as good a job as before.

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I use a TDS meter to measure the before and after results of filtering water with these. TDS = total dissolved solids.

These filter about 99% of TDS.

I find them quite pricey though.

These filters are hard to find and luckily I found them here. Ordered and received and they fit just perfect with my system. Very easily installed. I have to replace these filters about every six months depending on water usage. I will definitely be ordering these again when I need replacements.