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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.
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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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Written by babgaly | Staff

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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 11, 2026 11:24 AM
55 Posts
Joined Apr 2015
exlaJan 11, 2026 11:24 AM
55 Posts
thank you!
Jan 11, 2026 12:35 PM
733 Posts
Joined Feb 2019
joebellsJan 11, 2026 12:35 PM
733 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....
Any specific suggestions?
Jan 11, 2026 02:57 PM
397 Posts
Joined Sep 2012
The_Wilder_SpiritJan 11, 2026 02:57 PM
397 Posts
Quote from lionnoize :
Yea cuz calcium, magnesium, and potassium don't do anything right? You should teach us some more
Even Borat told us the importance of Potassium. Kazakhstan has significant potash (potassium salt) reserves, estimated at over 6.6 billion tonnes.
Jan 11, 2026 03:29 PM
145 Posts
Joined Nov 2006
MyDocumentsJan 11, 2026 03:29 PM
145 Posts
Quote from riffdex :
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.
How much alkaline water do you need to drink to make an appreciable increase in pH in your stomach such that pepsinogen fails to covert to pepsin?
1
Jan 11, 2026 03:43 PM
145 Posts
Joined Nov 2006
MyDocumentsJan 11, 2026 03:43 PM
145 Posts
Quote from riffdex :
It's been proven in testing that Alkaline water can permanently denature pepsin, which often becomes established in the esophageal tissue and can remain there, inactivated, indefinitely. This established pepsin enzyme, of course, becoming reactivated when acidity returns. Damage to the esophageal tract and the presence of this pepsin itself is evident in lab testing. It would not be possible for lab testing to produce these results due to the placebo effect.

https://pubmed.ncbi.nlm.nih.gov/22844861/

https://journals.sagepub.com/doi/...1212100702

https://jamiekoufman.com/alkaline...id-reflux/
Pepsin is the already active form of pepsinogen. It's very unlikely that you actually have pepsin floating around in your lower esophageal tissues waiting to be activated by the next time it becomes acidic
1
Jan 11, 2026 03:52 PM
102 Posts
Joined Dec 2014
HelloWallEJan 11, 2026 03:52 PM
102 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.
Readding minerals also prevents RO water from leeching whatever container you store it in. For example, I drink out of a metal water bottle and my RO water tastes like metal by the end of the day
Jan 11, 2026 04:00 PM
52 Posts
Joined Feb 2008
ahmedniniJan 11, 2026 04:00 PM
52 Posts
I've used SimPure RO systems with both the standard post-carbon filter and the alkaline filter. Regardless of the debate around alkaline water, I personally prefer the alkaline option—it tastes slightly better to me. With the regular filter, TDS was consistently at 0; with the alkaline filter, it comes in around 50 TDS.

Filter life has been excellent, likely helped by my whole-house carbon filter that reduces chlorine before the RO system. Overall, I'd recommend it. The only downside is the proprietary filters, but replacements are simple, quick, and the system takes up very little space under the sink. Note that this model works much better with a pressure tank, which I had to purchase separately.

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Jan 11, 2026 04:43 PM
846 Posts
Joined Aug 2012
riffdexJan 11, 2026 04:43 PM
846 Posts
Quote from MyDocuments :
Pepsin is the already active form of pepsinogen. It's very unlikely that you actually have pepsin floating around in your lower esophageal tissues waiting to be activated by the next time it becomes acidic
Except in cases of LPR, which is a reflux condition that is characterized by pepsin making its way up the esophageal tract and depositing itself in the tissues, creating an environment where the pepsin is reactivated the next time acidity becomes present. You know, the exact condition I have been referencing…
Jan 11, 2026 04:49 PM
846 Posts
Joined Aug 2012
riffdexJan 11, 2026 04:49 PM
846 Posts
Quote from MyDocuments :
How much alkaline water do you need to drink to make an appreciable increase in pH in your stomach such that pepsinogen fails to covert to pepsin?
Your comment doesn't make much sense. Alkaline water does not affect the PH levels in the stomach. And the goal is not to prevent pepsinogen from converting to pepsin. Pepsin plays a vital role in digestion, and it should be highly prevalent in the stomach. Pepsin is not a problem unless it has embedded itself into the delicate tissues of the upper esophagus.
Jan 11, 2026 05:02 PM
367 Posts
Joined Jan 2016
Gdn_MaximusJan 11, 2026 05:02 PM
367 Posts
Quote from DameTime :
Ive used the APEC water system RO for the past 2 years. The filters are reasonably priced.
Does APEC have alkaline filter?
Jan 11, 2026 06:11 PM
94 Posts
Joined Dec 2007
Steve2624Jan 11, 2026 06:11 PM
94 Posts
Has anyone tied this into a whole house stream humidifier? I'm getting a lot of buildup on the heating element.
Jan 11, 2026 06:23 PM
1,046 Posts
Joined Jan 2020
AmusedScent305Jan 11, 2026 06:23 PM
1,046 Posts
Quote from Audizzz :
I have iSpring RCC7AK, 6 stages. For my well water works great. My well water has ~600 ppm, ispring reduces it to 40ppm
How long does your RO membrane last with that level of TDS?
Jan 11, 2026 08:08 PM
2 Posts
Joined Oct 2025
teashtonsmurfJan 11, 2026 08:08 PM
2 Posts
Quote from NaPra :
Just wanted to mention that alkaline water "benefits" are bunch of nonsense: https://www.mayoclinic.org/health...q-20058029
True, but it does taste good.
Jan 11, 2026 08:34 PM
279 Posts
Joined Oct 2023
JoebargainJan 11, 2026 08:34 PM
279 Posts
Quote from ben_r_ :
Which RO system has clear canister filters?
I think ro systems never have clear filters because light would cause mold/mildew/bacteria/slime or something to grow on filters. I'm just assuming tho

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Jan 11, 2026 08:40 PM
49 Posts
Joined Dec 2022
greatvaluemeeseeksJan 11, 2026 08:40 PM
49 Posts
Quote from SpinControl :
I wouldn't say 100% nonsense.However, if you sweat a lot, the added minerals will "help". Obviously, a balanced diet is better.Most people do not get enough calcium or magnesium. Calcium will help bone. Magnesium is great for healing and energy.
You will get 10x more minerals from a bite of spinach than a gallon of aLkAlInE water. Minerals are reintroduced to distilled and RO water for taste in bottled water. The amounts added to both alkaline water and bottled water far below what is necessary to replenish what you sweat out or is far below what your body needs.
1

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