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frontpagebabgaly | Staff posted Jan 07, 2026 12:42 AM
frontpagebabgaly | Staff posted Jan 07, 2026 12:42 AM

SimPure Reverse Osmosis Under Sink Water Filter System (Alkaline or Near 0 TDS)

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$100

$199

49% off
Amazon
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SimPure Direct via Amazon has SimPure Reverse Osmosis Under Sink Water Filter System on sale listed below for $167.20 - 40% off when you visit the promo code page to activate (or apply promo code T1NEWYEAR at checkout) = $100.32. Shipping is free.

Thanks to Deal Hunter babgaly for sharing this deal.

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Editor's Notes

Written by citan359 | Staff
  • Rated 4.3 out of 5 stars based on over 1,300 Amazon customer reviews.
  • Please see the original post for additional details & give the forum comments a read for helpful discussion.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by babgaly | Staff
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Deal Details
Product Info
Community Notes
About the Poster
SimPure Direct via Amazon has SimPure Reverse Osmosis Under Sink Water Filter System on sale listed below for $167.20 - 40% off when you visit the promo code page to activate (or apply promo code T1NEWYEAR at checkout) = $100.32. Shipping is free.

Thanks to Deal Hunter babgaly for sharing this deal.

Available:

Editor's Notes

Written by citan359 | Staff
  • Rated 4.3 out of 5 stars based on over 1,300 Amazon customer reviews.
  • Please see the original post for additional details & give the forum comments a read for helpful discussion.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

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Top Comments

fieldcar
641 Posts
360 Reputation
Reverse osmosis (RO) systems remove nearly all dissolved minerals from water, including beneficial ones like calcium and magnesium. This results in water that is very pure but often tastes flat or bland due to the lack of minerals. Additionally, the absence of minerals can make the water slightly acidic, with a pH typically between 5.0 and 6.5.
To improve taste and balance pH, an alkaline filter is added as a final stage in some RO systems. This filter reintroduces essential minerals such as calcium, magnesium, and potassium into the water. Doing so raises the pH to a more neutral or slightly alkaline level (typically 7.0–8.5), enhances flavor, and gives the water a smoother mouthfeel.
In short, the alkaline filter prevents flat water by restoring minerals removed during RO filtration, making the water more pleasant to drink and less acidic.
pwnking
121 Posts
54 Reputation
Reverse osmosis tips. Only use dow filmtec membranes. Everything else is worse and not worth savinga few bucks. Amazon sells the film tecs for 30.00. Ispring is a decent starter brand for kits. Tank and the autoshut off valve are the weakest link. Might switch them out ASAP. Bulk Reef Supply is your best friend for RO. They dont sell garbage. Pumps are silly IMO. I get 98-99% rejection without it. If you do get a pump, this one is crap. Get a flowtec or shurflo. The pressure tank, is most likely the first thing that breaks though, and it's very hard to get an American tank. USA Water Systems used to sell American tanks, but now it seems you have to buy the whole 500.00 us system to get the us tank. Pretty solid warranty though.
NaPra
1871 Posts
2611 Reputation
Just wanted to mention that alkaline water "benefits" are bunch of nonsense: https://www.mayoclinic.org/health...q-20058029

181 Comments

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Jan 07, 2026 03:48 PM
476 Posts
Joined Feb 2009
Hamburgerler71Jan 07, 2026 03:48 PM
476 Posts

Our community has rated this post as helpful. If you agree, why not thank Hamburgerler71

Quote from lionnoize :
Yea cuz calcium, magnesium, and potassium don't do anything right? You should teach us some more
Medical science (SCIENCE) will tell you that your body will regulate the acidity of your body no matter what Gwyneth Paltrow or anyone else on the internet tells you. There is nothing you can ingest that will change the pH of your body as long as you lungs and kidneys are functioning properly. Well that is within reason and not deadly. As far as calcium, magnesium, and potassium, well, they are commonly known as electrolytes and most people consume way more than they need with drinks and supplements. This is causing an increase in kidney stones! Also your liver will detoxify your body not things that make you cry on the toilet. So take the information however you want, but just remember. Even though you think it makes sense and feels good if SCIENCE tells you that you are wrong. YOU ARE WRONG.
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Jan 07, 2026 03:49 PM
85 Posts
Joined Sep 2015
scomp23Jan 07, 2026 03:49 PM
85 Posts
Quote from fieldcar :
Reverse osmosis (RO) systems remove nearly all dissolved minerals from water, including beneficial ones like calcium and magnesium. This results in water that is very pure but often tastes flat or bland due to the lack of minerals. Additionally, the absence of minerals can make the water slightly acidic, with a pH typically between 5.0 and 6.5.
To improve taste and balance pH, an alkaline filter is added as a final stage in some RO systems. This filter reintroduces essential minerals such as calcium, magnesium, and potassium into the water. Doing so raises the pH to a more neutral or slightly alkaline level (typically 7.0–8.5), enhances flavor, and gives the water a smoother mouthfeel.
In short, the alkaline filter prevents flat water by restoring minerals removed during RO filtration, making the water more pleasant to drink and less acidic.
This is true. People generally will not like the taste of RO water without minerals added back in. I have a Frizzlife under-sink RO system and water that comes out of it is around 3-4 PPM for TDS. That water is then put through a filter to re-mineralize the water and the taste is much better.
Also, for what it's worth, I agree with one of the posts above- I highly recommend tankless if you want to go the under-sink RO filter route.
1
Jan 07, 2026 03:57 PM
73 Posts
Joined Jun 2021
DameTimeJan 07, 2026 03:57 PM
73 Posts

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Quote from ionz :
I was thinking of getting a RO system for a saltwater tank. The initial cost looks good but I think reviews complained about the motor failing and filter pricing. Anyone have a recommendation of what they use?
Ive used the APEC water system RO for the past 2 years. The filters are reasonably priced.
1
Jan 07, 2026 04:12 PM
11 Posts
Joined May 2013
vivekmanoJan 07, 2026 04:12 PM
11 Posts
Quote from scomp23 :
This is true. People generally will not like the taste of RO water without minerals added back in. I have a Frizzlife under-sink RO system and water that comes out of it is around 3-4 PPM for TDS. That water is then put through a filter to re-mineralize the water and the taste is much better.
Also, for what it's worth, I agree with one of the posts above- I highly recommend tankless if you want to go the under-sink RO filter route.
do you have a recommendation for both the tankless option and to remineralize the water?
Jan 07, 2026 04:20 PM
476 Posts
Joined Feb 2009
Hamburgerler71Jan 07, 2026 04:20 PM
476 Posts
So if I am reading this correctly the whole system is $100 But replacement filters for 1 year are $168. Does anyone know if I can buy more then 1 system with the code or am I limited to just 1? bonus back up pump tank etc.
Jan 07, 2026 05:01 PM
376 Posts
Joined Dec 2007
bobdobJan 07, 2026 05:01 PM
376 Posts

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Quote from ionz :
I was thinking of getting a RO system for a saltwater tank. The initial cost looks good but I think reviews complained about the motor failing and filter pricing. Anyone have a recommendation of what they use?
Don't buy into proprietary crap like this. Stick with standard 10" housings and RO membranes. More configurable to your needs and far cheaper to replace filters.
4
Jan 07, 2026 05:07 PM
154 Posts
Joined May 2021
TenderHalibut2061Jan 07, 2026 05:07 PM
154 Posts
I guess the advantage of the tank is higher flow rate? I'd rather not have to mount another thing under the sink though.
If this ain't it, can someone recommend an under sink system <$300? I'd prefer to pay more up front if cheaper filters are available. Just looking for good drinking water / for the coffee machine, I don't subscribe to the alkaline nonsense, and don't mind a slower flow rate.

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Jan 07, 2026 05:27 PM
73 Posts
Joined Jun 2021
DameTimeJan 07, 2026 05:27 PM
73 Posts
Deleted
Last edited by DameTime January 7, 2026 at 10:41 AM.
Jan 07, 2026 05:28 PM
304 Posts
Joined Jan 2021
BeautifulLake409Jan 07, 2026 05:28 PM
304 Posts
Quote from bobdob :
Don't buy into proprietary crap like this. Stick with standard 10" housings and RO membranes. More configurable to your needs and far cheaper to replace filters.
Any suggestions?
Jan 07, 2026 05:41 PM
73 Posts
Joined Jun 2021
DameTimeJan 07, 2026 05:41 PM
73 Posts
Deleted
Jan 07, 2026 07:13 PM
846 Posts
Joined Aug 2012
riffdexJan 07, 2026 07:13 PM
846 Posts

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Quote from Hamburgerler71 :
Medical science (SCIENCE) will tell you that your body will regulate the acidity of your body no matter what Gwyneth Paltrow or anyone else on the internet tells you. There is nothing you can ingest that will change the pH of your body as long as you lungs and kidneys are functioning properly. Well that is within reason and not deadly. As far as calcium, magnesium, and potassium, well, they are commonly known as electrolytes and most people consume way more than they need with drinks and supplements. This is causing an increase in kidney stones! Also your liver will detoxify your body not things that make you cry on the toilet. So take the information however you want, but just remember. Even though you think it makes sense and feels good if SCIENCE tells you that you are wrong. YOU ARE WRONG.
We see marketing claims that alkaline water will neutralize the overall body, and it's often purported as a way of neutralizing stomach acid. These claims are pseudoscience, and promote the false idea that the acidic environment of the stomach that is so vital to digestion need to be eliminated - claims that often sound logical enough to convince some end-consumers.

But you can't look at instances of erroneous claims as evidence that the underlying product itself has no application. Not everybody who is utilizing alkaline water is doing so because they believe it can "alkalize the entire body". It is a very effective as a targeted tool to treat conditions like LPR that results in a build up of pepsin in the upper esophageal tract, serving to neutralize the acids that should not be there, but are, and are causing damage to tissue in the region - with the implication that you are also taking concrete steps to address the underlying dysfunction itself.

The cool thing about Alkaline water is it's strictly speaking a generic term that refers to a water with alkaline properties, which no company (and their erroneous marketing campaigns) has a monopoly on. I produce my own Alkaline water in house at a fraction of the cost of any marketable product, and my utilization of the product is based on my understanding of the underlying chemical science, not any marketing team trying to convince me nonsense about the health benefits they claim their product can offer.
Last edited by riffdex January 7, 2026 at 12:43 PM.
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Jan 07, 2026 07:17 PM
2,111 Posts
Joined Sep 2014
1-6Jan 07, 2026 07:17 PM
2,111 Posts
This includes a permeate pump!
Jan 07, 2026 07:43 PM
1,169 Posts
Joined Apr 2015
TPMJBJan 07, 2026 07:43 PM
1,169 Posts
I have an RO filter (not this brand) but it's a game changer for Texas water. The water doesn't have many "contaminants" but a substantial amount of sodium (500ppm). Great for appliances, not great for taste.

Why do none of these advertise hooking up to a refrigerator? I did with mine, and drilled a small hole in the wall to get to the bathroom sink for the waste drain. Much more useful than an extra faucet for your sink.
Jan 07, 2026 07:47 PM
68 Posts
Joined Dec 2013
cptsovietJan 07, 2026 07:47 PM
68 Posts

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Quote from BeautifulLake409 :
Any suggestions?
Can vouch for Expresswater kit. Mine's been running great since 2017. The basic one costs $210 and should last for 1 year with jncluded filters.

You can buy 3 year supply of filters for $90 from their website. If your municipal water is not too bad, you can multiply filter life by 2.
https://www.expresswater.com/prod...t?variant=

You may be able to find it a little cheaper at home depot.

I can easily go 2 years on a membrane and as long as I change the prefilters once a year im still under 10ppm.

The $90 3-year kit will last me 6 years easily.

This is a generic kit using off the shelf parts. If you look up "reverse osmosis filter" you will find many results by different brands that all look the same, and you can expect them to work pretty much the same. In most cases the replacement filter kits are interchangeable too, but your mileage may vary.
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Jan 07, 2026 08:02 PM
433 Posts
Joined Jul 2020
Chris_TianJan 07, 2026 08:02 PM
433 Posts
Quote from Artc8888 :
PLEASE Note the replacement filter will cost you $63 (set) + RO filter ($52)..... also, i prefer to have a clear canister, where I can visually monitor the degradation of the filter....
That's a lot. I purchased over christmas a waterdrop t3-m which has the remineralization filter for $150(waterdrop had them on sale) refurbished with 2yr warranty. Filters for all 3(RO, carbon and Mineralization)are $56 which isnt bad.

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