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🚿 Elevate Every Drop: Whole-House Water Purity That Works as Hard as You Do
The iSpring F2WGB21B is a high-capacity whole house water filter replacement pack featuring a 5-micron polypropylene sediment filter and a coconut shell carbon block CTO filter. Certified to NSF/ANSI standards, it removes sediment, chlorine, odors, and harmful organic compounds, delivering up to 50,000 gallons of clean water. Compatible with standard 10" filtration systems, it extends appliance life and protects plumbing, all backed by robust customer support and warranty.




| Asin | B07HYB2TZ6 |
| Best Sellers Rank | #3,940 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #2 in Whole House Water Treatment Systems |
| Brand Name | iSpring |
| Capacity | 50000 gallons |
| Customer Reviews | 4.6 4.6 out of 5 stars (4,294) 4.6 out of 5 stars |
| Global Trade Identification Number | 00810004170223 |
| Included Components | 4.5" x 10" CTO Filter X1, 4.5" x 10" PP Sediment Filter X1 |
| Item Type Name | Whole House 4.5"x10" Water Filtration High Capacity Sediment and CTO Carbon Block Water Filter Replacement Cartridge Pack Set for WGB21B |
| Item Weight | 1.36 kg |
| Manufacturer | iSpring Water Systems |
| Material Type | Polypropylene, Coconut Shell Carbon |
| Model Name | F2WGB21B |
| Model Number | iSpring-WGB21B |
| Number Of Items | 2 |
| Other Special Features Of The Product | Chlorine Reduction |
| Part Number | F2WGB21B |
| Power Source | ac |
| Unit Count | 1 Count |
| Upc | 810004170223 |
| Warranty Description | 30 day warranty |
User
Willingness for customer satisfaction.
I installed this filter system myself and one of the filter canisters started to leak and I couldn’t stop it. I contacted ISpring and talked to Sean who was very helpful. He talked me thru the problem and sent me the replacement parts that I needed. He was very knowledgeable and now the system works great.
User
Works on nasty city water, reversable flow
Using this on city water that just smells nasty in Florida and it now has no smell and tastes great. I saw some reviewers that ran their waterlines back and forth becaust the way the filter set comes, the water inlet is on the right and the outlet on the left. This did not match my plumbing and it simply hurts my OCD to have the flow be right to left or have pipes come out of the wall and criss cross to match the backwards flow setup. Well, the filters on the bracket are symetrical and reversable easily with the bolts on the top. I checked with ispring and they confirmed that is legit so all is well. The dual set I purchased is really beefy with double orings on the filter housing, a really quality setup. I have a single filter on a whole house in another location and that lasts a year before the pressure starts dropping so I'll be watching if this one is the same or worse with the two filters in series. Only issue I had was to get the NPT fittings to seal into the filter, you have to tighten so much that it digs up the plastic on the housing but eventually seals. I used a coupler on both sides in case something starts to leak and I have to remove the housing. First time using Pex-A but seems to be leak free for now. I removed the labels on the filter packaging and stuck them on th bracket to remind me which went where since I reversed them from the way they shipped. A decent setup with quick reply from customer service for me...
User
ISpring makes great water filters
I researched different whole house water filters for several weeks and ended up with I Spring. I saw several reviews stating that they were experiencing leaks and a couple reviews even said the main housing cracked during installation. in my opinion these are the best water filters out there in this price range. The main bodies; (what the water lines attach to and the filter canisters screw into), is indeed plastic... but it is very thick and substantial - I was quite impressed and very pleased when i got them. When you pick one up you instantly notice the weight ... these things are beefy! I would suggest putting 6 or 7 complete wraps of Teflon tape around the fitting that you screw in to the housing. In doing that, I have not had any leaks and the unit has been installed for 3 weeks. Also , you do not need to over tighten the fitting, I used a 10 in wrench to reduce leverage and just put reasonable force into it. The filters themselves also are quite beefy and appear to be capable of significant loading before you see a noticeable pressure drop. just this week I have noticed an improvement in the water taste and starting to notice a difference in the reduction of water spots on dishes after washing, etc. I think it will take a couple months for all the water pipes to clean out a bit before the real difference is apparent. I had a cheaper system about 5 years ago and ended up ripping it out about a year later because of leaks and constantly replacing the filters. Then this summer I decided to try a better system. I highly recommend this product and more importantly this manufacturer. On a side note, I also ordered a 4th stage which is not installed yet; (the flex line will be replaced with rigid copper once I get the 4th stage installed). It was the big blue 20" filter and it did not come with the mounting bracket ... my bad. I contacted ISpring and they told me that the bracket is not included with the one i ordered. But in the same breath they said that their customer satisfaction is most important and they are sending me one completely free of charge without me even asking. So just stop reading reviews and order their products and get your water quality increased !!!
User
Too early to tell yet but if gladly pay the 30$ more for it to come with metal fittings.
We'll see how good it works. It comes with junky plastic fittings so make sure they get a good tape job and don't over torque. I busted mine so now I'm fishing a broken fitting out of the housing and replacing with a stainless one.
User
No Leakage - Just a smooth install!
Well worth the money. I read some reviews about leakage issues that were concerning to me. But, the install went well and there is absolutely no leakage of other issues. It is sturdy and well-built. Just follow directions and you should have no problems. Considering I just installed the unit, I can't comment on it's water filtration abilities until I use it for awhile, however I did notice that the water has no chemical odor now, which tells me it is doing its job. The warranty registration process for me went very well, thanks to Customer Service Rep, Robert, who was more than helpful with my questions.
User
reduces water sediment
My area tap water has high iron and this ispring has carbon and iron removal filter which was perfect for a single family house. I added a deescalar next to it near my water heater to help with my pipes and reducing water sediment.replacement filter is also every 6 to 12 months. So far happy with water quality. I had a plumber to install it.
User
Easy to install
Thanks it really doing a good job water Tate a lot better if it goes on sale I will buy another one thanks again
User
Easy to install
This filter system was easy to install myself. I had to buy a couple of tools, but way less than having it installed. Afterwards I needed to register my warranty and Robert was very helpful during the process. Im very happy with my purchase.
User
Muy útil y recomendable
La única crítica que tengo, es que es caro. Deberían haber paquetes que permitan abaratar sustancialmente el producto.
User
Highly recommended!
The iSpring whole house filter is extremely effective in filtering water, specifically well water in southern Alberta. Changing filters was simple and quick. Although it was helpful that the person that changed the filter was the one that installed the system. For my part, it was ordering the system and filters and communicating with Francis with iSpring. Francis provided exceptional service and gave me helpful and professional advice on more than one occasion. Much appreciated! Thank you again. The attached "after" photo shows how effective the filter is!
User
Value for Money
Very good filter at a good price.
User
Ottimo prodotto
Filtraggio acqua del pozzo
User
A Solid Whole House Filter System That Gives Peace of Mind
I wanted a whole-house filtration system rather than just a small drinking water filter, and this iSpring unit has been a really worthwhile upgrade.The biggest difference I noticed after installation was the overall feel of the water. It has a cleaner taste and there’s less of that typical chlorine smell you can sometimes notice with tap water. Knowing it’s designed to reduce things like sediments and certain unwanted contaminants also gives extra peace of mind, especially when the water is being used throughout the whole house.The system itself feels well made. The housing is sturdy, and the 1-inch inlet and outlet design makes it suitable for a proper whole-house setup rather than a small under-sink filter. Installation does require some basic plumbing knowledge or a professional installer depending on your setup, so it’s worth planning that part before purchasing.Once fitted, the system is very low maintenance. The filters are easy enough to access when replacement is needed, and I like that you’re not constantly dealing with small cartridges or separate filters around the house.It’s also nice having filtered water available from every tap rather than only one location. It makes a difference for everyday tasks like cooking, washing, and filling the kettle, not just drinking water.Overall, this feels like a quality filtration system that is designed for people who want a more complete solution rather than a temporary fix. It’s well built, effective, and gives a noticeable improvement in water quality.
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