Reverse Osmosis Filtration

Model WHER25 | For pricing visit Lowes.com

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WHER25 Whirlpool Reverse Osmosis Filtration

Reverse Osmosis Filtration

The Whirlpool® Reverse Osmosis Filtration System provides bottled water-quality drinking water right from your tap. There is no need to waste valuable refrigerator space storing bottles of water. Not only will you have high-quality water to drink, but cleaner water for making coffee and preparing food, which will taste better.

Whether your water comes from a municipal system or private well, the Whirlpool® Reverse Osmosis Filtration System provides you with fresh, filtered water right at your sink. This unit filters out dozens of contaminants that could be hiding in your water. Feel safer knowing that your family is drinking clean, safe water filtered by the Whirlpool® Reverse Osmosis Filtration System.

How Reverse Osmosis Works

Reverse osmosis is the same process used by many of the major bottled water suppliers. By purchasing a Whirlpool® Reverse Osmosis Filtration System, you can have the highest-quality water available from your own faucet for a fraction of the cost of bottled water.

Just how does the reverse osmosis process work? During the process, water is forced through a semi-permeable membrane that traps contaminants. These contaminants are then flushed out of the system and down the drain, leaving your drinking water clean and fresh.

Premium Filtration

Reduces Contaminants: Reduces select contaminants such as arsenic, copper, cysts, lead, radium and turbidity resulting from industrial discharge.

Reduces Chlorine, Taste & Odor: Chlorine is used in water treatment plants as a disinfectant. It has an unpleasant taste and odor.


Reduces Cryptosporidium and Giardia Cysts: These contaminants are naturally present in the environment and cause illness.

Reduces Dissolved Solids: Includes Arsenic, Copper, Nitrites, Nitrates, Radium, Chromium, Magnesium, and Sodium. Dissolved solids are solid materials that decompose in water and can enter the water supply from a variety of sources including erosion of natural deposits.

Reduces Lead: Lead is often found in household plumbing installed before 1986. It’s commonly introduced in drinking water through corrosion between water and lead pipe or solder.

Reduces Sediment: Includes sand, silt, and rust. Sediment can damage plumbing and appliances over time. It includes rust particles that can cause discoloration on clothing and fixtures.

Bottled Water Quality at Your Sink

Many popular bottled water companies use a reverse osmosis process to produce their water.

EZ-Change™ Indicator Light

Notifies you when to change filters and monitors water quality.

UltraEase™ Filter Replacements

No mess, no hassles for changing filters. A 6-month filter life means you only have to replace them twice a year.

Easy Installation

Comes complete with everything required for easy installation and use, including push-in fittings and colored tubing. Fits neatly under the kitchen sink.

Product Dimensions

  • D 9 1/2 in.
  • W 16 in.
  • H 13 1/2 in.

Dimensions are for planning purposes only. For complete information, visit owner center.

  • Replacement Membrane

    Model: WHEERM

    Lowes Item: 129801

    • UltraEase™ replacement membrane for WHER25 reverse osmosis system
    • UltraEase™ filters change in seconds with no hassles, no mess
    • 1-3 year filter life
    • NSF certified
  • Whirlpool® 2-Pack Under Sink Water Filters

    Model: WHEERF

    Lowes Item: 129793

    • UltraEase™ replacement pre and post filter for WHER25 reverse osmosis system
    • Includes replacement battery for EZ-Change™ Indicator Light
    • UltraEase™ filters change in seconds with no hassles, no mess
    • 6 month filter life
    • NSF certified
  •  

Frequently Asked Questions

Learn more about the Whirlpool® Reverse Osmosis Filtration System with these Frequently Asked Questions. If you have further questions, call 1-866-986-3223 or email us at info@ecodynewatertreatment.com.

How does a reverse osmosis (RO) system work?

The RO process forces water through a semi-permeable membrane that traps contaminants. These contaminants are then flushed down the drain, leaving your drinking water clean and fresh.

Why would I want an RO system in my home?

Reverse osmosis is the process used by many bottled water suppliers. Owning your own RO system gives you the highest-quality water available from your own faucet for a fraction of the cost of bottled water.

What does the RO system take out of my water supply?

The RO will reduce sediment, chlorine taste and odor, lead, crytosporidium and cysts and total dissolved solids (TDS). View the chart below for more information:

Sediment Filter Standard Carbon (Typical refrigerator or faucet-type system) 1 Micron Carbon (Premium versions of standard systems) Whirlpool® Reverse Osmosis WHER25
Ammonia X
Barium X
Bicarbonate X
Bromide X
Cadmium X
Chloride X
Chlorine X X X
Chromium X
Copper X
Cysts X X
Lead X X
Magnesium X
Nickel X
Nitrate X
Nitrite X
Sediment X X X X
Selenium X
Sodium X
Sulfate X
Tannin X
TDS X
Zink X

What is a dissolved solid?

Dissolved solids are solid materials that decompose in water and can enter the water supply from a variety of sources including erosion of natural deposits. Includes: Arsenic, Copper, Nitrites, Nitrates, Radium, Chromium, Magnesium, and Sodium.

How long do the filters last?

We recommend that you change the filters every six months. Leaving the filters in place longer than six months can increase the possibility of bacteria growth on the filters, which could then enter your water supply. The Whirlpool® RO system comes with an indicator light on the faucet to inform you when it is time to change filters.

The RO system also includes a membrane, which is the center of the three filter elements. The membrane will typically last 1-3 years, depending on water usage and the quality of your incoming water supply. The membrane should be replaced when you notice a difference in the taste of your water. The life expectancy of an RO membrane will be longer if you have a water softener because the membrane will not plug up with hard water particles.

Are the filters difficult to change?

The Whirlpool® Reverse Osmosis System features the UltraEase filter system. Other RO systems require you to turn off the water, wrench off the filter housing, remove the old filter from the housing and discard. It’s a time-consuming and messy process. With the UltraEase system, filter changes are easy—just turn the filter a quarter-turn to the left, remove and discard the whole element; the water is automatically turned off. When the new filter is installed, the water flow to the system will restore automatically. The UltraEase process provides an easy, mess-free way to replace your RO filters.

Does the Whirlpool® Reverse Osmosis System remove fluoride from my water supply?

This system does remove fluoride. For a list of all contaminants removed please see the performance data sheet located under the manuals and literature tab.

How easy is the installation of this product?

Typically, if your are able to install a new kitchen faucet or remove and clean a p-trap you should have no issue installing a Whirlpool® Reverse Osmosis System. Please see the installation page for this product for more details.

Where can the system be installed?

The RO system can be installed under the sink, in an adjoining cabinet or in a remote location. For more information about installation view the Installation Video on the Reverse Osmosis Home Page.

Can I hook up the RO system to my refrigerator?

The Whirlpool® RO system can be hooked up to the water line in a refrigerator. Normal incoming water pressure through the RO should be sufficient to operate the water dispenser on your refrigerator, but some pressure loss should be expected. This is because the RO system only delivers about half as much water pressure as your unfiltered household water supply. If you are on a low-pressure well pump system, please contact our Customer Service department to review your specific situation. They can be reached at 1-866-986-3223 or by email.

Why does the RO system require a storage tank?

The tank is utilized to store the water the system has produced. Reverse osmosis is a very fine filtration process and therefore produces drinking water fairly slowly. The system will keep adding water to the storage tank until it is full, giving you ample supply of high quality water when needed. As you remove water from the storage tank via the RO faucet, the system goes back to work to refill the tank.

Why do I hear a gurgling sound from the system even when I’m not using it?

This sound is the contaminant-filled water being sent down your drain. As the system fills the storage tank with filtered water, it sends the rejected water down your drain. This draining process and sound will continue until the storage tank is full once again.

How much water does an RO system use to make its finished water?

The Whirlpool® RO system will typically reject 5 gallons of water for every gallon it sends to the storage tank. This rejected water is used to clean the membrane as it allows the purified water through to the tank.

I want this high-quality water for my whole house. Why can’t I have a whole-house RO?

The RO process produces water fairly slowly so an RO system would not be able to supply your house with the volume of water or the water pressure the household would require. To get high-quality water for your entire home, a central water filtration system is recommended.

What are the specifications of the system?

Supply water pressure limits40-100 psi (280-689 kPa)
Supply water temperature limits40-100 °F (5-40°C)
Maximum total dissolved solids (TDS) 2000 ppm
Maximum water hardness @ 6.9 pH10 gpg
Maximum iron, manganese, hydrogen sulfide 0
Chlorine in water supply (max. ppm) 2.0
Supply water pH limits (pH)4-10
Product (quality) water, 24 hours (1) 18.46 gal. (55 liters)
Waste water per gallon of product water (1) 5 gal. (18.9 liters)
Percent rejection of TDS, minimum (new membrane) (1)90-95
Automatic shutoff controlyes
Efficiency (2)12.22%
Recovery (3)22.95%

This system conforms to NSF/ANSI 58 for the specific performance claims as verified and substantiated by test data.

  1. Feed water supply at 50 psi, 77°F, and 750 TDS —- Quality water production, amount of waste water and percent rejection all vary with changes in pressure, temperature and total dissolved solids.
  2. Efficiency rating means the percentage of the influent water to the system that is available to the user as reverse osmosis treated water under operating conditions that approximate typical daily usage.
  3. Recovery rating means the percentage of the influent water to the membrane portion of the system that is available to the user as reverse osmosis treated water when the system is operated without a storage tank or when the storage tank is bypassed.