iSpring F7-GAC NSF Certified 1-Year Replacement Filter Cartridge Pack, 7-Count for Standard 5-Stage Reverse Osmosis (RO) Systems

ISpring RO units...If you are getting an RO (Reverse Osmosis) water purification unit, whether you are good at this type of installation, or are contracting for a plumber to install an RO unit, BE SURE to purchase products from iSpring. Not only do they stand the test of time but iSpring customer service (John in particular) is top notch and takes all the time necessary to assist their customers. From their variety of units for your particular needs, to absolutely incredible customer service, you will be getting the very best in these RO water purification units and you will have dependable and very pure water to drink and cook with, and for any needs you would have for thoroughly purified clean filtered water. The water from the RO units have no odor and tastes delicious. Give yourself the security of installing RO units from iSpring, a top notch company providing very high quality dependable RO units and unparalleled customer support. Easy to use and installed properly there is no leakage and these units last years with proper maintenance.

This under sink 5 stage RO system went together easily with the help of the manual and is currently working quite well. A number of little things, like the spare parts kit and the leak sensor cutoff switch are a nice touch. The first stage sediment filter clear housing is a must and seems to only be included in this brand. Overall quality is excellent and the full color pictures with little installation hints were great. Some minor howevers... However, there are a couple of items that can be improved, although they don't directly affect the performance of the system. One is the sheer bulk of the system (and any other RO system of this design). For dual sink installations where you have two sets of drains - and possibly garbage disposers, the system will not fit under the sink in all cases - mine was one. The main problem is the pressure tank. If you have a cabinet next door to the sink that you can give up some space, then the tank can go there. Otherwise it could be a deal breaker. This should be explained at the beginning of the manual and should give a footprint diagram and state: "STOP! Before you unpack our system...". This could simply be an added sheet laying in the top of the package. Second, the tool list is basic and you'll need other tools depending on the installation. Buy the optional slide-out rack is a must unless you plan to unmount the entire RO system occasionally as it will be impossible to change filters under the sink, especially the RO membrane. I ended up installing mine in the utility room with the faucet mounted on my laundry sink. This would be true of any RO system of this design. Not something explained on Amazon web pages for any system I looked at. Third, the manual gives a great description on how to prepare the leak sensor feedwater cutoff device, but they omitted to tell you where to put it and which line to put it in. I added the term "feedwater" because that's the line you put it in. It should be placed in the bottom of the sink cabinet under the RO system to detect leaks from the various push-in connectors that wet the cabinet floor. That should be thoroughly explained and seems to have been missed. Fourth, this system on my pressure well pump with 50-65 psi pressure switch, produces about 20 gallons a day, not 75 as advertised on Amazon. Real specs are actually spelled out in the manual and are accurate there. Not sure why they are advertising 75 GPD. The RO water to waste water ratio is not 1.5:1, which sounds amazing. It is closer to 1:1.5, which is closer to what I have read, about RO systems and is actually quite good for a non-boosted system. Although this is what I expected, it is something to be aware of if you are using it heavily and are paying for your water. A note on the above performance: my TDS (total dissolved solids) is lab tested at about 280 ppm for calcium compounds. This is high, resulting in very hard water, and will slow down RO water production. Also, running the system on a constant regulated higher pressure of 65 psi will improve the RO ratio and production performance. If you're not sure the RO system is working, without a TDS meter, just taste the waste water. (be careful if you suspect high levels of contaminants). Mine tastes like you dissolved a stick of chalk in it - imagined. The RO water is refreshing and clean. Overall, the system is excellent. The USA based company is one reason I chose this system. Although I have not had to use their help, other reviewers did and got good service. I highly recommend this system and their USA based company iSpring.

Great product, does what it suppose to do. Easy replacement

I have had my Isprings RO system for several years now. It has been a great performer and I have 0 complaints. The replacement filters are reasonably priced and all the equipment is quality. Anytime I have any issues or questions I am able to call them and get a tech on the phone that can answer my questions. Recently I spoke with Don about a 3rd party addon filter I purchased that was causing issues with my system flow. He took the time to troubleshoot the issue with me, even though the part causing the issues was sold by another company. He was able to quickly get my system working again and sent me a spare flow restrictor to accommodate the new flow rate. There are many places you can buy RO systems and filters out there and it wouldn't surprise me if they came from the same factories in China. But to have an American company that backs the product they sell and provides top notch after sales support is what really matters to me. Thank you Don!

Easy to install

Worked as expected water taste great.

Good product and very easy to install

The filter was very easy to install. To my thinking, the instructions are thorough and properly sequenced. Most importantly the family loves the water.

bon rapport qualité / prix. Filtration correcte pour l'instant - à voir si la durée de vie est équivalente aux produits de marque.

Bought this set in order to replace filters in my iSpring water filter. Initially thought of cheaper no name, kinda compatible options but then I thought - does it really worth it to potentially compromise filtration quality for 10-15 quid? Nah. To change the filters, you just need to stop the water flow in filter and tank, unscrew using provided key, filter out + filter in, close well and test in the end to make sure no leaks. You can follow youtube too. It is really not hard at all. If you've seen cheap filters before, you would be able to say straight away that this filters even visually and upon touch are well made. In general, I'm very happy with my RO system for 6+ years and these filters are of course an essential part of it. In my time-tested opinion, they are great quality and provide great value for your money. Change them in time and pure, great tasting water is guaranteed. Hope it helps and stay well and healthy!

Todo excelente.

Buena calidad, tengo iSpring 7 etapas desde febrero 2018, es mejor compra. Solo compro filtros para cambiar

Missing one Gac carbon filter in the package....