iSpring F4-CUA4 Replacement Pack for 4-Stage Ultra Filtration System CU-A4, Sediment, UF, KDF, and Activated Carbon Filter, 4pcs, White

My Experience with the iSpring CU-A4 Under Sink Water Filter I recently installed the iSpring CU-A4 under sink water filter, and I'm genuinely impressed. As someone who's always been a bit skeptical about the true efficacy of home water filtration systems, this unit has completely changed my perspective. First off, the installation was surprisingly straightforward. I'm no plumbing expert, but the clear instructions and well-organized components made the process relatively painless. Within an hour or so, I had fresh, filtered water flowing from my dedicated faucet. And what a difference it makes! The most noticeable improvement is in the taste and smell of the water. Our tap water, while generally safe, often had a slight chlorine odor and a somewhat metallic aftertaste. With the iSpring CU-A4, that's completely gone. The water is crisp, clean, and incredibly refreshing. It's truly a pleasure to drink, and I find myself reaching for water more often throughout the day. Even my coffee and tea taste noticeably better. I also appreciate the compact design of the unit. It fits neatly under my sink without taking up an excessive amount of valuable cabinet space, which is a huge plus in smaller kitchens. The dedicated faucet is sleek and unobtrusive, blending well with my existing fixtures. While I can't scientifically measure the contaminant reduction, the peace of mind knowing that my family is drinking water filtered through a reputable system is invaluable. The four-stage filtration process, including activated carbon and ultrafiltration, gives me confidence that we're significantly reducing chlorine, sediment, and other common impurities. In conclusion, the iSpring CU-A4 under sink water filter is an excellent investment for anyone looking to improve the quality of their drinking water. It's easy to install, produces great-tasting water, and offers genuine peace of mind. Highly recommended!

We're really very happy with our new water filter system. It was pretty straightforward to fit, and after running the water through for about 20 - 30 minutes we have water that looks, tastes and smells much better than the regular tap water. You really can tell the difference. No more unpleasant chlorine smell. Having a dedicated tap for the filtered water is a good idea, because then you're not using filtered water to fill up your basin for washing up etc, thus keeping the life in the filters for longer. Fitting the new tap was pretty straight forward on an aluminium kitchen sink. I just drilled a guide hole, and used the tool in the link that I'll put below this review that I bought also from Amazon to cut the hole. Easy to do, just needs a bit of brute force, but it makes a very neat hole. The water from the tap fills a glass at a good speed. One thing to add, is that the customer support is excellent. After fitting, I had a follow up question that I contacted the team about. The reply from Nick was prompt, courteous, and above all really helpful. This should be kept in mind as a big plus point if you're contemplating which manufacturer you should buy from. This is the link to the tool I used to cut the hole in my aluminium sink: https://amzn.eu/d/hEzgCox SagaSave 25mm (16-50MM) Sheet Metal Punch Hole Punch, Metal Inner Hex Hole Cutter for Q.Max, Steel Plate, Stainless Steel

Long time customer or iSpring. I've installed the american style system in my family homes in Canada and this system in my home in the UK. Their filtered water tastes as it should! I had an issue with the included tap/faucet leaking but iSpring sent out a replacement that works without issue. Only other issue I had in years of owning this was not being able to find replacement paper discs for the mechanical leak sensor (water makes the paper discs swell which pushes on a valve to close the flow of water), and because I get condensation under my sink I have to replace them more regularly than I'd want to. I contacted iSpring and Francis helped me out with that too. They're very good at after sales support - that's probably the main reason I keep coming back to them, aside from the quality of their product that is. I can easily recommend it to you if you have a 1-stage filter or filter jug and are looking for some real water filtration. The cost of filters is only marginally higher than for a filter jug, and for something that gives you on-demand well filtered water without waiting.

This undersink unit was very easy to fit. The fittings are metric, and my pipes were older i/2 inch, so I bought a 1/2 inch to 15mm converter, and new metric washing machine tap, to fit it in the washing machine cold water pipe as this seemed easier than cutting the cold water pipe going up to the tap. The small water pipes use an O-ring system, and one had a leak when I first turned the water back on, I just hadn't quite fitted the pipe correctly and I was able to just remove and refit it, which cured the leak. You have to run the water for quite a while to let the filters settle down, and, to start with, it spat a lot when turning the tap on, until all the air bubbles had worked their way out of the filters, and it works perfectly now. Gives very reasonably priced peace of mind, knowing you are drinking crystal clear fresh water.

Why did you choose this product over others?: Absolutely avoid this, does not filter anything whatsoever. My kettle scalding so much compared to my old filter it s disgusting. Water taste even worse than normal tap. And it was cloudy for weeks. Will have to buy my old filter again and go through the hassle of install...

So happy with the quality and taste of my water now. You just don't realise how horrible tap water taste until you plug in ispring. It's been 1 hour since install and I'm already thinking of upgrading to the best unit ispring can offer.

The water is still cloudy, I have never experienced this with other filters. May I know why?

Installed on our boat , filters holding tanks and provide great tasting water Hard to get filters in Bahamas for sure

Tarde mucho en elegir y me decidí por estos filtros por su fácil instalación , fácil cambio de cartuchos después de 12 meses , y el precio muy recomendables . Debes dejar que fluya por 15 min antes de tomar agua cuando es la primera vez que se use los filtros. La empresa que los hace es de USA y tienen buenas reseñas en ese país eso da mucha tranquilidad ,que vienen de una empresa sólida.

Volevo liberarmi dalla schiavitù di dover acquistare casse d'acqua, e avevo due scelte per il depuratore: osmosi inversa e ultrafiltrazione. Vivo a Roma e l'acqua qui è buona, nel mio caso non credo abbia senso usare l'osmosi inversa che toglie tutti i sali minerali e poi rimineralizza l'acqua, così dopo un po' di ricerche ho trovato questo articolo. L'ho scelto perché ha ottime recensioni, principalmente all'estero, è perché è certificato NSF 42 e 53, che pochissimi prodotti hanno: rimuove moltissimi micro-inquinanti incluse le micro-plastiche. Il prodotto arriva già pre installato, i filtri sono già avviati al supporto superiore, quindi si devono solo collegare i tubi, non è necessario fissarlo a muro, io l'ho appoggiato alla base del mobile, ma sono forniti anche i tasselli per il fissaggio a muro. Ci ho messo circa 30 minuti a montarlo, però nel mio caso ho preferito comprare anche un rubinetto che avesse sia uscita acqua caldo/fredda, che depurata, non volevo fare un secondo buco sul lavello. La prima volta che ho aperto il rubinetto é venuta fuori un po' di polvere nera, ho cercato online, sembra sia normale, che non sia tossica, comunque le istruzioni del prodotto dicono di far scorrere l'acqua per un po'. I primi 2-3 minuti l'acqua non aveva ancora un buon sapore, così l'ho fatta scorrere per 30 minuti in totale, forse un po' troppi, in ogni caso il risultato è stato ottimo: l'acqua non ha più nessun gusto di cloro e sembra di bere acqua in bottiglia, che è quello che volevo ottenere, quindi consiglio assolutamente l'acquisto! Ho verificato sia pH che TDS dell'acqua depurata e sono quasi identici a quella dell'acqua fredda normale, come dovrebbe essere dato che non rimuove i sali minerali dell'acqua corrente. Ho acquistato anche un gasatore della Soda Stream, così posso anche fare l'acqua leggermente frizzante a mio piacimento.

I am a General Contractor/Home builder. We originally had a RO system that provided us with excellent tasting water, but took up most of the under-cabinet and had to be sanitized with bleach at each filter change.. We don't have hard water and our tap water is drinkable but we wanted it cleaner, and the RO had intermittent leak problems. Could I find a system that would relieve us of the clutter , the maintenance, the water leaks under the cabinet, and still get great water? I decided to give the CU-A4 a shot. SO, Here goes what I didn't like, and then what I liked: CONS: 1. The directions do NOT adequately describe how to make the water connections. To someone who has installed with these type connections it is an obvious "no-brainer", but to the rest of us......... Parts of the directions appeared to be for a different unit, and especially the section on installing the faucet, which was obviously from their RO system and was not anywhere close to describing the faucet enclosed. The faucet enclosed is an "air gap" style which requires a hole in your sink deck or in your counter of 1 1/8" minimum. The threaded pipe that will go through this opening is 1" in diameter. If your existing hole is anywhere from 1 1/2" to 1 1/8" the provided washer will work fine. 2. While there was plenty of 1/4" tubing to do the installation, There are 3 colors of tube, red, white and blue. They provided plenty of blue and white, but not red, therefore I used white and labeled it red to make the job a clean install. 3. There is no discussion in the manual of run-in time after completing the install. The water was barely drinkable after letting it free-flow for approximately 10 minutes as suggested in the notes . After flushing the system with approximately 15 more gallons the water was crystal clear and the flavor has become progressively better and better and has stabilized. PROS: 1. The system IS actually easy to install when you have familiarized yourself with everything they have sent and how it will work with your existing plumbing and sink. AND you have purchased anything you might need so the system will integrate seamlessly. 2. The snap-fit connections work great and do not leak a drop. 3. Twist on replacement filters. How could it get any simpler??? 4. Takes up minimal space. 5. The faucet is all metal construction. 6. After initial flushing and after the first week of use (approx. 1 Gal per day)t the water tastes GREAT. As good or better than any of the bottled waters we have tested against. 7. Every time I have called them (of course during business hours...duh...) they have been very responsive. So, customer service gets a nod. CONCLUSION: Well worth the money, Simple design and install Great tasting water NOTES: 1.There is a review about salt taste. If you have softened water, then you may want to contact your service company regarding what is best to work with your existing system. At the very least do an internet search on how softeners and filters can work together before purchasing this system. 2. There are reviews that mention a 1/2" 3-way valve and having to buy adapter fittings. My system came with a 3/8 to 3/8" 3-way valve (which worked perfectly), so it seems iSpring has changed it to the more typical size. 3. One reviewer gave 3 stars because this system does not reduce TDS and it cost them 10% restocking to return it. TDS is reduced by RO systems, This is NOT a RO system. iSpring does not claim reduced TDS. If you need reduced TDS...iSpring has a very highly rated RO system ( http://www.amazon.com/iSpring-RCC7-Reverse-featuring-See-through/dp/B003XELTTG/ref=cm_cr_pr_product_sims?ie=UTF8 ) for about $200.00. 4. Most every review says the directions suck. I can attest to that. They do! Layout everything from the box, familiarize yourself with it, identify any problems with your existing plumbing. Take the 3-way valve with you to your local home improvement store and buy whatever you need. 5. Make certain you have the correct tools to accomplish the install. 6. For a water tight connection fit, remove the blue "horseshoe" clips and FIRMLY push the 1/4" tubing approximately 5/16" in to the couplers until you feel it "bottom out", check the assembly by firmly pulling on the 1/4" tubing. Replace the blue clip. 7. I made all of my tubing the same length and long enough for me to remove the filter manifold a couple feet from the cabinet to facilitate changing the filters when that time comes. The tubing is coiled and taped up (love that blue tape), and will be easy to undo and stretch out. 8. I purchased an extra set of filters ahead of time, and store them right next to the unit. 9. Instead of changing my filters by use of a calendar (such as recommended by the manufacturer, every 6 months), I will change them based on usage. Since we only use it for drinking and cooking, we likely will never hit a max avg of 3gals per day. Most filter manufacturers claim 6mos. is relatively equal to 1200 Gals. Therefore 3 gals x 365 days = 1095 gals. (1095 is approx 90% of 1200 filter life). That is when I will change mine, at about 1 year. You also can adjust your schedule based on this formula. If you use 6 1/2 gals per day, you will hit the 1200 threshold at about 6 months. Were you to use 10 gals per day you would want to replace the filters after 4 months. AND so on. If you don't have a basin wrench, get one from your tool store, (see images) Make your life easier.

I always drink water straight from the tap but a few months back, the water supply to my home tasted chemically weird intermittently. Calling PUB did not solve the issue so turned to a water filter system instead. I got this system because iSpring is a reliable brand among the many systems out there and the replacement filters are readily available online. The provided installation instruction is pretty straightforward, most difficult part is to drill a hole through my granite countertop to fit the faucet. Will need a power drill and a diamond bit for that. Cheaper to get the diamond bit from aliexpress. Did not get any leaks on first run. Flushed over 20 ltrs of water through the system before the water looks clear enough to drink. The filtered water taste like regular tap water but it should get rid of the intermittent chemical taste. The faucet feels solid but it's lever is a bit tight compared to my main sink faucet. I did not use the supplied water leak detector.