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Description
Replacement Filter Kit for 5-Stage Home RO Water Filter Systems | 6-Month Service PackRFK 5 Replacement Filter Kit for Home RO Water FiltrationSystems For use in 5 Stage Home RO Systems with 10" Standard Filter Housings Semi Annual Service Pack (Pre and Post Filters) RFK 5 Replacement RO Filter Kit Includes: (1) 10" Standard 5 Micron Sediment Filter (Stage 1) (2) 10" Standard Carbon Block Filters (Stages 2 & 3) (1) In Line Carbon Post Filter (Stage 5) (2) Threaded to QC adapters for universal post filter connections (1) Instruction
RFK-5 Replacement Filter Kit for Home RO Water FiltrationSystems
For use in 5 Stage Home RO Systems with 10" Standard Filter Housings
Semi-Annual Service Pack (Pre-and-Post Filters)
RFK-5 Replacement RO Filter Kit Includes:
This filter kit contains pre and post filters only (membrane not included) and is intended for the semi-annual filters change-outs (between membrane replacements) or if the membrane is purchased separately. Benefits of AMI Replacement Filter Packs for Home RO Systems
For maximum performance, it is recommended to change all filter cartridges and post filter every 6 months, but replacement schedules will vary with water quality. Membrane elements (sold separately) are recommended to be replaced yearly. |
For use in 5-Stage Home RO Systems
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Instructions for Replacing Filters in Home RO System(click to enlarge, print, and download) |
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4.6 ★★★★★
Based on 1471 reviews
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Product Reviews
★★★★★ 5
Reliable, Low-Cost, Functional, Comfortable, What Else?
Color: Silver, Style: AE-1000WD-1AV
This is an amazing watch. I used the same watch for 15 years and in 2025 I bought it again after the older one was damaged due to some aggressive chemical.
I live in the East Coast of the US and I have friends and family in different parts of Europe. I regularly check the time over there. I use the timer for when I am brushing my teeth. I use the stopwatch when I brew coffee. I use the alarms for my daily short walks and to wake up.
I had to remove two sections of the strap to make it a good fit for my wrist. You may need to do that as well.
All around it is just an excellent watch. Casio is of course amazing with quality. I would recommend it to anyone. I know smart watches are getting more and more common but trust me, one less device to charge regularly is a better improvement in your life than anything else.
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Reviewed in the United States on September 15, 2025
★★★★★ 4
Good watch but misadvertised with wrong color
Color: Black, Style: AE-1000W-1AVDF
So far I really like this watch but you get a different watch color than pictured. The watch is the AE-1000W-1AVDF which shows silver/grey and black, with a blue world map. You don't get that as the 1AVDF model is an all black watch with a grey world map. The watch is just as nice but not what was shown and sold as, so BEWARE.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Very nice watch for the price.
Color: Black/Gold, Style: AE-1000W-1A3VCF, Color: Black/Gold, Style: AE-1000W-1A3VCF
Very nice watch and good deal. This watch was in excellent condition and looked great after I modified it.
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Reviewed in the United States on May 11, 2026
★★★★★ 5
Great Watch For the Money
Color: Black/Black, Style: AE1000W-1BVCF
I have been purchasing Casio watch products for over 25 years now. Their watches are low cost and nicely designed. I was not let down when I received this watch and all for 18 dollars. The watch is nice looking, has mostly usable features which fulfills its purpose. For a watch that costs under 20 dollars this is a great knock-around piece that can be worn in any setting. Whether hiking/climbing in the woods, fixing the car, swimming or just plain rough housing with my kids, having a low cost and functional watch that fits all my needs really makes this product a great buy.
This Casio comes with several functions:
1) You can track up to 4 different time zones. Since I do a fair amount of business travel (about 1x a month), I am constantly in different time zones. Now I can set them easily.
2) The watch has a manual DST setting which I don't mind. It's literally a push of a button.
3) It is water resistant to 10 Bar. This means swimmers, surfers, etc... can use this watch with confidence.
4) It comes with a typical alarm. I always make sure I know how to turn this off, because you know somehow some 2 or 3 year old will get it and find a way to turn on the alarm so that it wakes you and 0200 in the morning.
5) Stop watch. Not much to say here. I use it for running/walking
Cons: A couple of oddball design features that are difficult to see.
1) The upper right hand circle is actually a visual of an analogue watch, so that if you look at another time zone besides the one that you set for your home city, you can get a quick view of the time. Not so easy to see.
2) The time zone characterization is also difficult to see and not so sure it is necessary, since the back of the directions lists out the cities you can use to select the proper time zones.
So this may not be a "smart" watch which seems to be very popular these days, but I will say the price makes it very worth while. If you need a knock-around that looks nice and has the core functions you need, I think you will be very satisfied with this product. You know... maybe some things don't need to be smart. Enjoy!
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Reviewed in the United States on November 2, 2014
★★★★★ 5
It is mini computer for such a low price. My favorite. Just go for it, you will be amazed!
Color: Black, Style: AE-1000W-1AVDF
I would say this is a mini computer and I keep wondering how could they put these many functions inside this small watch and offering it for 15 dollars.I'm blown away by this wonderful product and this is my favorite watch all the time and I rarely wear my other watches.
Isn't this amazing that it got the time for close to 50 cities and I can select 4 of them in T1(Home City), T2, T3 and T4 to easily flip through using the bottom right button. This functionality helped me a lot during my 2 international trips through multiple transits. Before the departure I select all the Cities that I'm transiting through so that I can easily flip to that time zone when I land in that airport and I do not need to rely on airport clock or internet to know the time and calculating the time left for catching my connecting flight. I love this watch especially for this functionality.
While scrolling through the time zones for selection the tiny world map in the watch will blink the specific geographical area for that time zone. The capabilities of this watch does not end here, It has lot more to offer.
We can program 5 daily or one time alarms into this tiny piece. Stopwatch, Counter, 12 or 24 hour time format, Day light saving ON or OFF which simplifies the time setting when the DST switches. We can set it to signal a beep for every hour.
There is digitally displayed manual clock at the top right corner which will display your home country time stored in the T1 timezone. When I go on an international trip, I flip the digital display to local time(T2-T4) and will refer the home city time(T1) in the manual clock.
The watch is really durable, light weight, stylish, sporty, water proof, 10 years battery life and comes with a detailed instruction for setting up each and every functionality of this watch.What more can I expect for a 15 dollar watch.
My impression to buy this watch happened after seeing one my friends wearing it. I bought one for me and 3 more for giving it as gift. My friend lost it twice and bought the same watch 3rd time which proves how much he also likes it.
The last thing that I want to say is, I don't like the fancy brands which charge their customers just for the sake of their brand name or fancy packaging and offer noting more than a normal brand offers. I always prefer quality over show off so I picked this Casio watch. I really appreciate that CASIO believed in quality and functionality and not on fancy packaging.
I feel really bad that I'm writing this review after 1.5 years of my purchase and I should have done it long back. I highly recommend this watch for everyone and I'm sure you will never be disappointed.
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Reviewed in the United States on April 23, 2016