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💧 Elevate your home water game—pure, protected, and perfectly filtered!
The AO Smith Single-Stage Whole House Water Filtration System (AO-WH-PRE) is an NSF certified sediment pre-filter designed to deliver sediment-free water from every tap. With a 200-gallon capacity and easy DIY installation using the included wrench, it reduces dirt, rust, and particulate matter to protect plumbing and appliances. Compatible with additional AO Smith filtration units, it offers customizable whole-home water purification without the need for electricity or complex plumbing.






| ASIN | B07R7BP5Y5 |
| Best Sellers Rank | #15,924 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Industrial Process Filter Housings |
| Brand | A. O. Smith |
| Brand Name | A. O. Smith |
| Capacity | 200 Gallons |
| Container Type | Cartridges |
| Customer Reviews | 4.3 out of 5 stars 1,887 Reviews |
| Included Components | Wrench |
| Installation Type | Freestanding |
| Item Dimensions L x W x H | 12.8"L x 5.39"W x 5.2"H |
| Manufacturer | AO Smith |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | AO-WH-PRE |
| Model Number | AO-WH-PRE |
| Other Special Features of the Product | NSF certified |
| Part Number | AO-WH-PRE |
| Power Source | Manual Operation |
| Product Dimensions | 12.8"L x 5.39"W x 5.2"H |
| Purification Method | Sedimentation |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | NSF certified |
| Supported Water TDS Level Maximum (PPM) | 300 |
| Unit Count | 1.0 Count |
V**R
Saved Me THOUSANDS of $. Hire a Plumber to Install
Making sure the water coming into my home faucets, showers, hoses, and sprinklers is as pure as possible is very important to me. All city and well water has either chemicals for treatment and/or minerals that can reduce the life of appliances like dishwashers, water heaters, washing machines, and these chemicals and minerals are not good for your skin, hair, sinks, showers, and clothes. I originally called 5 different plumbers to quote me to install a whole house system that could address these issues. Prices ranged from $3000 to $10,000 installed. I did EXTENSIVE research including talking to my city water department to determine exactly which chemicals were added to treat my water. I also had the water tested to determine the amount of chemicals, minerals, and sediment that I was trying to remove from the water. After a week of research I found this product on Amazon that would filter most of my concerns for only $329. Because I have brand new appliances including two tankless water heaters, I wanted extra purification features. For this I bought separately the GOLDEN ICEPURE 3 Stage Whole House Water Filter System for $299. I'm fairly handy but was not comfortable installing on my own. I hired a plumber, and for $600 and they installed both units for me in about 4 hours. So, out the door I only spent $1200 for a great system! My family immediately noticed a difference in the shower. Everybody noticed their skin was softer and not irritated, soap and shampoo washed off easier, and clothes came out cleaner and softer. I like to wash/detail my cars at home and I noticed the water spotting was much less and easier to clean than before I had the system installed. PROS: 1. MUCH CHEAPER than a whole house water filtration system even when adding on additional filtration system. 2. Low profile for space saving installation 3. Works great and water tested showing chloramine, sediment, and water hardness removed 4. Saves money up front and long term by extending life of appliances that use water and are normally damaged due to mineral deposits 5. Skin feels better and not irritated 6. No salt to refill 7. If the power fails the system will still function as apposed to electric descalers 8. My wife is happy! CONS: 1. I would not attempt to install this on my own. Its not really supposed to be a DIY for the average home owner. My plumber said it was easy to install and I'm happy with that. This has been installed for 9 months without any issues. I will update the review if something changes.
E**E
whole house chlorine filter
I finally got around to having this installed by a plumber in my water softener loop. I had one that was 8 years old (another MFR) that I recently removed and decided that I NEEDED a chlorine filter. My old one was about 4 feet high and I wasn't sure if I needed to replace it or not, but I felt after 8 years, it must be due. I flushed this with the garden hose and the water was running clear in less than 10 minutes, so that was easy. What took me so long to install this was actually the plumber I was using. He had been to my home for a water softener and then again to remove the old chlorine filter. After BOTH visits, my water tasted and smelled like acetone for about 3 days even after flushing for over an hour. Well, I will tell you WHY this happened. The original plumber was in a rush and did not let the pvc primers/glue cure and completely dry enough before turning the water back on! I got a new plumber who waited about 45 minutes for it to cure and dry.....no smell or taste in the water! If you are doing this yourself or hiring someone, make sure you/they wait more than enough time for it to cure and dry COMPLETELY. If your water smells or tastes like acetone, there was not enough time given to dry/cure. And in my case 15-20 minutes was not enough time but 45 minutes worked well. If you get the smell/taste of acetone after turning the water on, the only thing you can do is wait it out, about 2-3 full days. The thing I noticed about this filter is that it is made by the same manufacturer that makes Aquasana filters. How do I know this? It was on the shipping label from the MFR to Amazon, then Amazon to me (there were 2 labels on the box) These exact filters are sold in lowes too for the same price here, but you don't have to lug it around and you may save on sales tax ordering online. I thought they were much heavier than they actually are which is why I ordered here. It works well, I smell no chlorine on any tap in the house. I also installed a pre-filter, (AO smith as well) that I picked up locally and installed that BEFORE this charcoal filter to get any sediment and rust particles from the city water. Yes, city water does have it and after one day, you can see the prefilter is no longer pristine white. After 3 days the prefilter is a light orange and I NEVER had a visible rust problem in my home. Now I know why my salt softener filter was slightly orange after a month! rust in the water. AFTER the charcoal filter is my salt water softener. I will absolutely buy this filter again in 6 years when it comes time to replace it. Great filter, great price, Amazon convenience and customer service if you need it.
W**.
Its a good filter
Works as it should. Put on pump suction line and it cleared my rust problem up. Only been in operation for a week. Easy to install arrows for flow.
R**X
Reduces scale buildup as claimed but not as easy to install
2 year Update (June 2022) ------------------------------- It has been working satisfactorily but one problem has cropped up. It started leaking at the white circular flange where my finger points to. It is very minor drip, maybe an ounce a day and you can see the dampness on the floor around the base in the picture. Not a deal breaker but not happy either. 3 month Update (Sep 2021) ---------------------------------- I am writing this review three and a half months after installing enough time to get a good idea. The water is 17-18 GPG hardness from my city water supply I can definitely see a significant reduction in hard water scale formation. It does not completely eliminate but reduces it by 80-85% which is good enough for me. It forms light white smudges (not caked on scale like untreated hard water does) and the smudges are easily wiped out with damp cloth , no. CLR needed. Installation ************** This entirely depends on your water inlet pipe situation and plumbing skills. For my house the city water pipe was outside the garage (about 8 inches away and 6 inches underground ) and went under the foundation to surface at the faucets and appliances. So there was no section running inside the garage along the wall to install the descaler. The only way to do it was cut the pipe outside the grarage just before it went under the foundation, pull a loop from there into the garage through the filter + descaler and connect it back out. This was way beyond my plumbing skills and had a plumber do it, it cost me $600 but was well worth it. He did an excellent job and there has not been a drop of water leak. If you have the water inlet pipe easily accessible in your garage or basement and have medium level plumbing skills it can be installed easily.
O**O
Unit is preassembled.
It has been delivered on time, and in the good condition. Unit is assembled. You do not need to add bids by yourself. ( before you can weight the bids bag to verify if it is 6lb.)
W**E
They will not honor the 1 year warranty claim, you only get 30 days (buyer beware).
A.O. Smith says they have a 1 year guarantee against any defects. I bought this in July and the housing cracked in September. I submitted photos, receipts, proof of purchase and they agreed I qualified for a replacement. Multiple calls later I still have never received a replacement. They said I had to go through Amazon (which only has returns for 30 days). After 30 days Amazon says I need to contact the seller, the seller tells me I need to contact Amazon. This is false advertising, they claim a 1 year warranty but if it is past 30 days you are out of luck. Customer service claims they will take care of it and call me back, they have never taken care of it and never called me back. I have to call, wait on hold forever and speak to a new person every time. It is now May 2026 (7+ months after it cracked) and still nothing.
A**A
good filter
good product
F**D
High Quality water filter features
We bought this AO Smith whole house water filter after our extensive search on our favorite supplier website, Amazon. We were looking for a water filter that had a high quality filter abilities, off, bypass, and filter adjustments, as well a highly competent 3/4 inch filter “in and out” threads. This filter has metal inserts, which were highly important to us after having read so many reviews demonstrating most of the other brand filters with 3/4” plastic treading usually leaked according to many reviews. Why buy something right off the bat that has build in flaws like a leaking from in and out soft plastic threads. We have the new AO Smith filter that we just received and haven’t installed it yet. The included photos of our pump house setup for a rain catchment tank in Hawaii is still under daily use. That filter has plastic threads and Does Not leak, but we opted for a new filter after several years, because our filter o-ring was a problem. Keep in mind too, not only does the AO Smith water filter have water line metal thread inserts, it also has a unique o-ring placement that looks great in the top of the high tempered, plastic screw off, filter containment chamber. I believe the O-ring has the good possibility of not giving us the trouble as compared to the o-ring we have now that sits up in the filter upper housing. Time can only tell what’s what’s once we get the new water filter installed. I’ll try to update this review with any pros or cons once the new filter is in operation a reasonable amount of time. In the meantime, I suggest you carefully compare as I did before quickly buying a water filter. It is important to be an informed buyer. There are so many water filters on Amazon, but we think we may have bought the best one for our purpose. We do know the AOSmith filter has those real important features I mentioned that are a must in a filter. Having taken the new AO Smith filter out of the box as soon as we got it, we were very impressed over the high quality appearance of this filter it presented. We considered too the AO Smith name, a long standing reputable company name.
J**U
Très bon filtre.
Ce filtre est installé pour toute la maison. Réellement efficace.
Trustpilot
2 weeks ago
1 month ago