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Whirlpool WHER25 Reverse Osmosis System Review

Whirlpool being the manufacturer of the home appliances has a great reputation and goodwill in the market. They are trying to be the one-stop for the homeowners when it comes to the Home Appliances. From cooking to the dishwashers, Microwave oven to Refrigerator they have everything for you.

Whirlpool WHER25 Reverse Osmosis System Review

Home Owners also look for Whirlpool Reverse osmosis systems desperately. That’s why in this article we will review Whirlpool WHER25 thoroughly. So, you can make an informed decision about your purchase.

Whirlpool WHER25 Reverse Osmosis System – Key Features


Whirlpool WHER25 Uses 3 Stages of filtration to make your feedwater contaminant free. Almost all the contaminants will be reduced or eliminated from the tap water including arsenic, Lead, Nitrates, Barium, and many more.

All the 3 stages perform differently. Let’s have a look at how the filtration actually occurs in Whirlpool WHER25.

Whirlpool WHER25 Reverse Osmosis System

1st Stage

When the water enters the filtration process, it goes through the pre-filter. This filter removes all the larger particles along with the chlorine and odor. This elimination assists the RO Membrane (Next stage) to work efficiently and even this stage is the reason for the RO Membrane’s longer life span.

2nd Stage

At this stage, the RO Membrane eliminates all the total dissolved solids (TDS) from the tap water and reduces all the heavy pollutants.

3rd Stage

Post-filters work at that stage to remove all the remaining particles, odors, and the chemicals from the filtered water, ensuring that you have the completely purified drinking water.


Hydro-logic RO 31035 for Hydroponics

Hydro-logic RO 31035 for Hydroponics | Editor’s choice:

Filtration Stages: 3 stages, Water Production: 100 Gallons, Waste Ratio: 2:1

  • The Hydro-Logic Stealth RO100 Reverse Osmosis Filter is the perfect solution for any water filtration needs.
  • This system produces up to 100 gallons of ultra pure, low PPM high quality drinking water every day while removing 98% of chlorine and contaminants.
  • The stealth has an automatic shut off valve which optimizes filter life by automatically shutting off when it reaches its maximum capacity so you don’t have worry about wasting money on filters!

Produced Water Quality

The filtration process meets all the Standards of the NSF 42 and 58, which means the produced water quality is second to none. The produced water will be completely purified and drinkable. You don’t need to spend on bottled water anymore. Whirlpool WHER25 can produce you the water of the same quality.

Although, the taste of the produced water will be acidic as it has only the basic filtration stages which remove all the TDS from the water. It does not have any issue with your health but if you want to improve the taste. There are ways for water remineralization.


Whirlpool WHER25 has a compact design that can be fit under the kitchen counter easily. While the installation process is so easy that everyone can set up the system with any one’s help. Read the instructions manual first for understanding the installation process. Otherwise, a lack of knowledge can cause leakage or other serious damage.


After completing the installation, Sanitization is the most important step that must not avoid. For this purpose, Whirlpool WHER25 sanitizing kit is already available inside the box and the process of sanitization is mentioned step by step in the manual.


The filters replacement is also an easy task to perform. The filter replacement duration depends on the quality of feed water. While here’s the standard duration that is given by the manufacturer.

6 Months for Pre-Filters

2 Year for RO- Membrane

6 Months for Post-Filters

The manufacturer has even integrated the LED indicator to inform you of the time when filters need to be replaced. The cost of Whirlpool WHER25 replacement filters is higher than the competitors.


The point that is disturbing is that after the replacement of filters you have to turn on the faucet for at least 24 hours before you actually start drinking water from this system. That’s a great waste of water that we don’t even recommend and encourage.

Who Can Buy This System?

This system at the standard pressure from 40-100 psi works decently in removing the contaminants from the water. But still, it is not suitable for those who have a well water source. Its performance has been noted better with the municipal water.

Relatively, water production is too low. It is rated for producing only 18 GPD. This amount of water will never be suitable for the larger and even for the medium households. Before purchasing this system keeps this amount of produced water in your mind. Families that require a smaller amount of water to consume can go with this product.

Final Thoughts

Whirlpool WHER25 Reverse osmosis system is almost an average product with a moderate price, decent performance, and simple maintenance. But the water filtration capacity is too low that can’t serve medium and larger sized families.

To be honest, this system does not worth buying. Many people consider it the best option for under 200$. Although, it’s not the case. There are many other best RO Systems available that you can get with the very minor difference in price and believe me or not they have a way higher water production capacity with the more filtration stages and the lesser water waste.

If you are on a tight budget, previously reviewed Under 200$ models APEC ROES-50 and iSpring RCC7 are far better than Whirlpool WHER25.

Whirlpool WHER25 RO system is not recommended due to its comparatively lesser filtration stages, higher waste, higher cost of ownership, and lower water production.

We have covered every detailed feature of this unit, to help you in making the final decision.

If you have found it useful, do share it with your friends too! 🙂

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