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

exla

Jan 11, 2026 11:24 AM

118 Comments

Joined Apr 2015

exlaJan 11, 2026 11:24 AM

118 Comments

thank you!

joebells

Jan 11, 2026 12:35 PM

788 Comments

Joined Feb 2019

joebellsJan 11, 2026 12:35 PM

788 Comments

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?

The_Wilder_Spirit

Jan 11, 2026 2:57 PM

397 Comments

Joined Sep 2012

The_Wilder_SpiritJan 11, 2026 2:57 PM

397 Comments

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.

1

MyDocuments

Jan 11, 2026 3:29 PM

154 Comments

Joined Nov 2006

MyDocumentsJan 11, 2026 3:29 PM

154 Comments

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

MyDocuments

Jan 11, 2026 3:43 PM

154 Comments

Joined Nov 2006

MyDocumentsJan 11, 2026 3:43 PM

154 Comments

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

HelloWallE

Jan 11, 2026 3:52 PM

102 Comments

Joined Dec 2014

HelloWallEJan 11, 2026 3:52 PM

102 Comments

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

ahmednini

Jan 11, 2026 4:00 PM

53 Comments

Joined Feb 2008

ahmedniniJan 11, 2026 4:00 PM

53 Comments

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.

riffdex

Jan 11, 2026 4:43 PM

924 Comments

Joined Aug 2012

riffdexJan 11, 2026 4:43 PM

924 Comments

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…

1

riffdex

Jan 11, 2026 4:49 PM

924 Comments

Joined Aug 2012

riffdexJan 11, 2026 4:49 PM

924 Comments

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.

1

Gdn_Maximus

Jan 11, 2026 5:02 PM

378 Comments

Joined Jan 2016

Gdn_MaximusJan 11, 2026 5:02 PM

378 Comments

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?

Steve2624

Jan 11, 2026 6:11 PM

95 Comments

Joined Dec 2007

Steve2624Jan 11, 2026 6:11 PM

95 Comments

Has anyone tied this into a whole house stream humidifier? I'm getting a lot of buildup on the heating element.

AmusedScent305

Pro

Jan 11, 2026 6:23 PM

1.1K Comments

Joined Jan 2020

AmusedScent305

Pro

Jan 11, 2026 6:23 PM

1.1K Comments

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?

teashtonsmurf

Jan 11, 2026 8:08 PM

7 Comments

Joined Oct 2025

teashtonsmurfJan 11, 2026 8:08 PM

7 Comments

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.

Joebargain

Jan 11, 2026 8:34 PM

332 Comments

Joined Oct 2023

JoebargainJan 11, 2026 8:34 PM

332 Comments

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

greatvaluemeeseeks

Jan 11, 2026 8:40 PM

65 Comments

Joined Dec 2022

greatvaluemeeseeksJan 11, 2026 8:40 PM

65 Comments

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

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

$100

$199

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