Features:

  • Replacement Whirlpool reverse osmosis pre/post filter 2 pack (fits systems WHAROS5, WHAPSRO & WHER25)
  • System is certified to reduce numerous contaminants including chlorine taste and odor, sediment, cysts, lead, chemicals, and dissolved solids
  • 6 month filter life - replace your systems pre and post filter every 6 months. It is essential to change your filters on time to ensure your system is working properly
  • Ultraease filter replacement - change filter in seconds with just a quarter turn – no hassles, no mess, no need to turn off your water supply
  • Made In The USA
Works great, easy to mod

I have had this filter for 6 years and love it. As one reviewer stated "I love water now". I have found a few ways to take this from a really good filter system to an awesome filter system... First, don't use a water softener if you can help it. If not, then at least put this before the softener. Water softeners work by removing calcium ions (scale) from your water and replacing them with sodium ions. They usually add Total Dissolved Solids (TDS) to your water and this makes your filter have to work harder, requiring more frequent filter replacements. Second and probably the most important tip, buy a TDS meter. Don't go by the blinking 6 month indicator light. Chances are your filters will last much longer than 6 months. A TDS meter will tell you for sure. Check your water quality once a month. When your TDS starts to rise, it's time to replace your carbon pre-filter. If it goes back down (will be high at first with a new filter), then great. If not, then replace your carbon post-filter. This will greatly cut down on the cost of replacement filters because you only replace them when needed. More than likely you will not have to replace the reverse osmosis membrane but once every few years. Again, go by the TDS meter to tell you when the filters need replacement. I replace my carbon filters about once every 6-8 months and my reverse osmosis membrane every 2-3 years. Throw the battery away and don't even use the 6 month light... To get your filters to last even longer, install a whole house carbon filter right after your water pressure regulator, before your reverse osmosis system. You will not only save money by replacing just the whole house element every 3 months or so, you will also save your plumbing fixtures by keeping sediment out of the lines. By pre-filtering the water, most of the sediment will be removed before it ever gets to your reverse osmosis (RO) system which will make those more expensive filters last longer. Also, by using a carbon whole house filter and not just a regular sediment filter, you will remove most of the chlorine from your water. This will remove chlorine from your shower water and from the water you use to water your plants. They will thank you! Some people have complained about a gurgling noise. This is caused by sludge build up in the drain line. If you take the black line apart, you will see black sludge clogging the line. This causes turbulence, i.e. noise. For maintenance, put a dropper full of bleach in the air break located on the side of the faucet. You can clean the sludge away from the line and inside the key hole shaped air break with a q-tip. If your want more water output, buy a second air diaphragm tank. I have a 44 gallon tank that I hooked up by cutting the yellow hose that goes to the existing tank, putting in a tee fitting and running a second hose to my 44 gallon tank. You can have virtually unlimited filtered water for cooking, ice makers, home brewing beer, hooking up to an aquarium auto-top off system, etc. This filter system is rated to produce about 14 gallons of water a day, if you need more you can always buy another one and hook them up in series. Just add more diaphragm storage tanks as needed. If you add more tanks to the system, be sure you sanitize them. Place a couple of drops of bleach in the tank before you hook it up. Allow it to fill completely with water (overnight or however long it takes). Then, empty it completely through the faucet before using it. Maintenance on the tank(s) requires that you periodically check the air pressure. Pressure should be between 5-7 psi with 6 psi being the target. This system only pressurizes to about 30 psi and so you will have to bleed off some air from any new tanks you install. Most are pressurized from the factory to 30 psi and you will have to bleed it down to 6 psi to get full capacity from them. Now if you want pristine water that will be cleaner than any bottled water you can buy, add a de-ionizing filter. On the side of the RO system, there is a blue outlet line. This is your reverse osmosis filtered water that goes up to the faucet... Cut this line and hook it into a de-ionizing (DI) cartridge. I have a dual chambered system on mine. One end of the cut blue line will go into the DI filter and the other end of the blue line goes into the other end of the DI filter. Now all the RO water will flow into a DI filter resin which will strip out all total dissolved solids leaving you with ultra purified, pristine water. This is a must if you want to use this water for an aquarium. This has practically eliminated my water changes, but that's a different discussion... To make DI filter change out easy, be sure to install a cutoff valve before the DI filter so that you can shut off water from the RO system. You can also shut off water without a shutoff valve if you simply unscrew the post carbon filter on your RO system. You will spill a few drops but it's not that big of a deal On my system, I bought a permanently installed TDS meter. It has two probes, one for water going in, and water going out. I hooked the probes up to the water flow before and after the DI filter by using a Tee fitting with the probe inserted in the water stream. The "in" probe reads water quality before the DI filter, but after the RO system. I use this to monitor the performance of the RO system. I usually maintain 1-3ppm of total dissolved solids coming out of my RO system. If this number climbs, then I know it's time to replace a carbon filter or two... I use the "out" probe to monitor the DI filter. It has a replaceable resin and when I notice any rise in TDS coming out of the DI filter, I will replace the resin. It's just a grain like sand that you dump in the cartridge. Simple to replace. On my system I always get 0ppm of TDS which is about as clean as you can get. MUCH cleaner than any bottled water you will find. It rivals distilled in terms of quality. My DI resin lasts me about 3-4 years. This is with about 4-5 gallons of use per day. If you do all of these things, you will have a very high quality system that is both easy to maintain and low cost. It's nice having RO/DI filtered water on tap for my fish tank and it makes drinking water taste good again! For clarity here is a flow diagram: Whole house carbon filter-> RO carbon pre-filter-> RO membrane-> storage tank(s)-> RO carbon post-filter-> TDS "in" probe-> DI filter resin-> TDS "out" probe-> faucet. You can tee the line off the faucet and hook it up to your refrigerator's ice maker, aquarium auto top off system, etc.

Ok product

Fills a gallon then it slows down a lot then an hour or so later it can do another fast so if you need a lot of water it’s probably not for you . Also my ph actually ranges from 7.5 -8.4 . I was told it should be neutral a 7ph . Also PLASTIC faucet is upsetting.

Replacement unit still best in market

Installed original unit in 2008, inside gasket started leaking in 2019. Purchased replacement unit for <$150 which includes 3 filters. Took about 15 minutes to re-install, all the hose diameters were the same as before, so hats off to Whirlpool engineers not to fiddle with something that was fine the first time. Very pleased with the quality of water for the past 11 years. The provided faucet is poorly made, doesn't attach and hold well to the sink and made from cheap plastic with chrome finish. Yuk. I purchased another faucet made of metal and it has worked great. The unit was installed in the ceiling of an unfinished basement just beneath the kitchen faucet. I chose not to install under the sink. Whenever I experienced poor water pressure, I used a compressor and added pressure to the tank. I did not measure the pressure, but added a little bit at a time until the faucet water came out easily. Highly recommend this unit, we use it everyday, and the water is very tasty.

Replace these on your RO unit every six months.

When we bought our current home the previous owners bought 5 gal jugs of water for drinking and cooking. I was not too keen about luging 40 pound jugs of water home so I installed a Whirlpool RO unit. I have the supplied faucet installed in the kitchen sink and I installed a T and ran a second line to the frige. We are very pleased with the water from our RO unit. Our well tap water measures around 500 ppm disolved solids, the water coming out of the RO unit meaasures at 20 ppm. I replace the RO filters every 6 months and I replace the RO membrane cartridge every 18 months.

Work great, but double-check your installation

I can no longer find these filters where I bought my reverse osmosis water filter system. Thank goodness I can find them here, They're super easy to change, but make sure they're screwed on snugly and check in an hour for drips. I found a puddle under my sink the next day, and found that a very slow leak had flooded the undersink cabinet (with a 2 inch deep tray to catch leaks). The tray filled up and overflowed. After cleaning up all the mess, we found that one filter just needed to be slightly tightened.

Great water!

I just replaced my old unit that this one (same thing). I bet I had it for 15 years and the bladder started leaking through. I played with the old one and got another couple years out of it but if you think about it, that is not a good thing to do. After replacing it I was surprised how much water pressure increased and longer fills. These units are great and the water is fantastic! Good value also.

Flawless

This was the only reasonably priced unit I found that is made in the USA. The installation was easy and I had zero leaks. Very happy with this purchase.

Great water filter system, have been using it for years

Our water suffers from high TDS, turbidity, H2S, huge quantities of fine sediment, and rust fungus. We kill the fungus with chlorination at the well head. We also have multiple mechanical filters and an iron breaker. The Whirlpool system comes at the end. The water going into it is not that bad but you can see it's got some amber to it. This filter system matches the quality of bottled water. The product is completely clear and neutral in taste. In our application the filters last quite long, maybe a year or so. We go through a lot of water, being in the high desert.

Pre and post filter for the excellent Whirlpool WHER25 Reverse Osmosis Filter

These are the replacement filters for the Whirlpool WHER25 Reverse Osmosis filter, which is highly recommended by Consumer Reports. I have one of these filters in each of our homes and rely on them for clean safe drinking water. This package contains the pre and post carbon filters, as well as a battery --- all the parts necessary for the bi-annual service the WHER25 needs. NOTE: If your water contains a lot of particulate matter (i.e. from a well) you should install a 5 micron whole house filter. If you don't this relatively expensive pre-filter will get clogged soon (as soon as 2 weeks) and then your RO filter will stop producing water. The good people at Whirlpool's 1-800 number said the trade the pre and post filters to get a little extra usage out of them until the new replacement filters arrived in the mail.

Love this R/O system!

We purchased this model for our house 15 years ago...when we moved 10 years ago, we purchased again for the new house. I've also purchased one for my sister. Depending on your water supply is how often you'll have to change the filters (in Georgia, we had to replace them every 2 months...here in western NY and being right off Lake Erie, we don't have to change them nearly as often...sometimes up to a full year!). This is a great system for removing impurities from the water, leaving it tasting...well, like water should. My true test is drinking it at room temperature...as a matter of fact, tastewise, better than any bottled water on the marked (unless it's also R/O treated). I highly recommend this filtration system.

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