Waterdrop WHF21-FG 2-Stage Whole House Water Filter System, 5 Micron

This filter system works well. Was a bit of job to do it myself but I got it done no leaks. We definitely can tell the difference on our well water. We had a smell issue and for the most part it's gone. With interchangeable filters you can try the different filters and see if they can help with whatever issue you may have. We are satisfied with it's performance. Water pressure is same as it was before the filter was installed. For the price it a good deal, it seems depending on what filters you ger the prices do change but the housing is the same on the different units. Water is clear and cool. We have a RO unit so we don't drink the tap as it's well water.

The first 2 stage filter purchased was installed at my property with no issues and has worked well. There have been no water pressure drops and the smell and taste is significantly better. It is important to ensure you choose the correct filters for your application though. I had to replace one of the filters for a carbon one as I still had a chlorine smell. Not a big deal as they are interchangeable and I should have done more homework prior to purchase to avoid it. I then purchased a second filter for my daughters home and that was a very different, frustrating and costly experience. After full install we found a leak between the two filters where the canisters join. We had to have the pipes cut out, remove everything, take it apart only to find that one of the Orings on the right side was missing - very poor quality control that resulted in costing more than the filters! An Oring was sourced and added which fixed the issue, however it turned out to be very expensive as unfortunately you can't pressure test it without installing it and having to remove everything and replace some of the fittings resulted is doubling the plumbing cost. To leave the Oring off altogether is simply unacceptable quality control! Update: The manufacturer really stands behind their product. They reached out to me and gave me a full refund to cover the added installation costs. In addition, they have reached out to offer another product really going above and beyond in service excellence. Quality issues can happen on occasion with any product so take it that this was an exception to the rule of their quality standards and would therefore highly recommend their products.

I have want a filter on the in coming water supply to my house for some time. With some recent repairs getting done it was the perfect time. I checked with Lowe's and Home Depot and while Lowe's had what I wanted, Home Depot did not. So I checked Amazon and found this one. It was what I wanted and at a lower price. With costs every where going up stupid fast saving every dime has become important. Pros: 1. Large capacity. It filters our entire daily water usage with no issues. 2. Standard size filter elements, makes replacement inexpensive. 3. Easy install. Take the bracket off the housing (8 screws make it easy) when drilling the holes to mount it. Then re-attach the bracket to the housing and hang it. Super easy. 4. All materials needed to install the filter, except plumbing fittings are included. 5. Easy to understand instructions. There isn't much to installing one of these, yet a lot of Chinese made products have crappy instructions. Cons: 1. Opaque housing means you can visually assess the state of the filters without opening the housing. 2. Filters need to be replaced regularly. This is the down side of all filters. Mine has been in for less than 30 days so no idea of the actual service life. Word of caution. Some articles say you should replace the filter every 3 months. You will need to determine this on your own. A family of 5 uses more water than a family of 1 or 2. So you need to monitor your water quality and determine your own replacement interval. After installation, mine had a leak. Turns out, one of the inlet fittings was cracked. A replacement came from Amazon with their usual mediocre delivery schedule. The replacement works perfect, no leaks. Overall I am pleased with this filter.

Purchased this unit for my water service which has a very high Chlorine level and smell. I process my water in the home for drinking through an single under counter cold water filter/faucet currently and then processed that through a filtration pitcher. In an effort to start the process sooner and hopefully remove having to use the pitcher portion. I installed this 2 stage housing unit with the base filters to start with. I am happy with the product from the installation level and it went in pretty easy. I installed it after the pressure valve and meter as you can see in the picture, and I need to add a tie-in with a check valve to the outside hose bib, for filter change startup running of the water, but for now I just run the cold water through the sink in the kitchen. It has drastically reduced the chlorine smell in the hot water of the shower and it functions as the starting point. The standard filters that came with it however did not reduce the chlorine level as much as I would have liked to see. I will be changing out the 2nd stage filter for a better grade unit to see if that gets the result I am looking for, which is to get to a point of not having to use the pitcher and just passing the drinking water through the under counter filter, after if has passed through the whole house filter. I did not give it 5 stars because even though the unit was extremely simple to install, I feel the mounting bracket could be a bit stronger and more stable. The current bracket flexes with very little pressure on the filters. I don't see any issue for a problem down the line in the future, I just would have preferred something that did not flex as much as it does. I do highly recommend the housing unit for anyone looking for a basic 2 stage unit. The only suggestion is to make sure that your filter options will meet your needs for your project.

We DIY’d the replacement install of this upgraded whole house water filtration system. No fitting/adapters are included, normal practice, as everyone’s situation is unique. The instructions did not specify a preferential material type of fitting adapter/s. Just that the system was a 1” female and in our case we needed to adapt to 3/4” home pex plumbing. The first 2 times attempting install, we used metal adapter/fittings, both times the system leaked. The metal also caused the female threaded area in the unit, to shed a small amount of plastic with each install. First install attempt we used plumber’s tape wrapped around male threads 10 times, as the instructions recommended. For the second install attempt, we used plumber’s putty, it still leaked. Determined to stop the leaking, I searched on you tube for install video’s. One video showed this exact system and they used polypropylene adapter fitting. So here on Amazon, I found a heavy duty polypropylene hose fitting that adapted from the 1” to 3/4” (Banjo HB100-075 Polypropylene adapter). They worked great with both the system and our Pex plumbing. Used a heat gun to soften the Pex, then pushed the Pex into the barbed 3/4” end. Allowed it to cool down. On the adapter’s male threaded end, we applied plumber’s putty to the threads, added 4-5 turns of plumber’s tape and ended with a thin layer of more plumber’s putty, (over top of the tape). The putty helped the plumber’s tape to adhere much better than usual. We then ended with a small amount of plumber’s putty over top of the tape. In the system housing on the 1” female thread area, we applied a small amount of plumber’s putty. After hand installing the fitting adapter into the unit, we used a metal adjustable wrench to tighten it down. It took “3rd times a charm” but we are now very happy with this system. We have a high iron content (16ppm) and so far, the system seems to be working out great!! It is much better than the single unit we replaced. If I can figure it out, I will update this review on how long these filters last. If they don’t last long enough, I will upgrade to the better filters available. This will help extend time between filter replacements. Just a side note: I also learned from the YouTube video, to use a “food grade” lubricant/grease on the large O-rings. It will allow less friction on the ring, therefore allowing the ring to last longer. There are two O-rings on each filter casing. The top one comes off easy, so the whole ring could be coated. The bottom ring is tight, so I did not remove it. I applied the lubricant just on the exposed part of this O-ring. Hope this information makes everyone’s install experience so much easier. Use polypropylene fittings/adapters ONLY, NOT METAL!! Also use both the combination of plumber’s putty and tape!!

Leaked at the outlet where the brass insert meets the plastic housing. Customer service rep, Karina, quickly sent me a full replacement system. As a professional, I occasionally receive new equipment that is defective. What matters is the response, and Waterdrop responded perfectly. I still prefer the brass inserts this system has compared to the cheaper brands that only have plastic threads. The filter itself works great in this 141 year old home.

Purchased this for our RV. I followed the directions and the process went great. I made a stand to hang the filter housing . I did the recommended 10 wraps with Teflon tape. I used a 1" NPT to a 3/4 GHT fitting as I was connecting to water hoses. With that much tape used I had a slight issue with the fittings trying to cross thread but with a little patience they finally started correctly Our seasonal site has alot of iron with a yellowish color. I flushed the filters according to the directions then hooked up to the RV. Fantastic water Great tasting absolutely clear water. Very pleased. No leaks!!!! I purchased 3/4 wide Teflon tape . Lots easier.

I received the filter set, unpacked it and read the instruction manual. I was shocked to see the requirement to wrap 10 turns of Teflon tape over the male end of my adapters. I have been a DIY'er for decades. I re-plumbed my home, Installed sinks, toilets, dishwashers, hot water tanks, expansion tanks, pumps, spigots, etc. and I've never heard of having to put 10 wraps of Teflon tape on a male pipe. Nor has Google or ChatGPT. As an engineer, my first reaction was that the die used to cut the threads was oversized and the "more than 10 wraps" was a giant band aid in an attempt to cover up a significant manufacturing defect. The first try with 10 wraps failed. I disassembled and rewrapped "more than 10" as defined by the manual (12 wraps). It sealed. Then the filter leaked. I removed it, inspected it and reassembled it, using the provided wrench to tighten it. It held tight for several hours and then both the inlet, one of the filters and the connector between the two filters all were leaking within 24 hours. I'm in an off grid cabin running 35 psi max so I'm certain it's not excessive pressure. I probably should have read ALL the reviews before purchasing this filter set. Other people have had the same issue and resolved it by experimenting with multiple different materials for the inlet and outlet. While I applaud their persistence, I figure it should work right out of the box. I used industry standard couplings. I shouldn't have to experiment with various materials, numbers of wraps, application of plumbers putty, etc. to make it work. Edit 2025-09-02: Once I made this original review I was immediately contacted by their customer service department. We had a LOT of correspondence. They sent me a new filter set. During this time I carefully read the "1 Star" reviews for this company and other companies who sell a nearly identical product. They all have a significant number who complain about leaks. The root cause is the threads are not NPT (see the attached drawing). When a tapered thread is screwed into a non tapered thread only the very end threads (the biggest) make contact. This is why the nipple has to be screwed in to the very end. Instead of ALL the threads making contact, only the end threads make contact. The product does not comply with US standards. I of course explained all this to their Customer Service Department (Waterdrop's, not Amazon). While they were very polite and persistent, Customer Service can't fix the problem. It's an engineering problem. If I could do a review only for Customer service they would get a 5 star rating but I have to leave my rating as 1 star because I'm reviewing the produce, not Customer Service. If they change to thread cutting to do fit NPT they probably would have a very acceptable product. But as it stands now, it's not. I removed the Waterdrop filter and found another solution that does not leak.

So far great product, originally I did not realize how big it was but install super easy just remember to but a 1"mnpt to attach to your water supply line. We line in a area with very high Iron in the water had a small standard filter but would have to replace every month or more if I wanted to keep some of the iron out, Really hope this one does a fantastic job and lasts 6 months like it says have not checked anything on the filters for this yet will do an inspection of them 1 month in to see how they are doing and update if I remember

Easy installation, and good quality water.

Good quality and seems be working as advertised. I used pipe thread tape and compound as well the first time plumbing in the fittings. So far no issues with leakage. Haven’t had my water tested since being installed but has noticed our hard water/iron smell has gotten better since instalment. Only has been a few days but hoping it’ll only improve with time. Happy with the purchase thus far.

I had to use a 1" NPT Male to 3/4" NPT Female Pipe Fitting Reducer . I put 10 to 12 wraps of teflon tape as recommended . Both the in and out 1 inch end leaked. I had to take out the adapter and put another 10 wraps of tape on it. This stopped the leak and it didn't bottom out. It looked like the adapter with only 10-12 wraps screwed all the way in and the base of the adapter was cutting into the plastic when it bottomed out. I would recommend this product but if you put a adapter in dbl the tape and it should be good. This was my only problem thus the 4* and not 5*

Had very low water quality in our 20year old new to us home. Installed the filter. Totally eliminated smell and painful taste. Highly recommend this product.