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expired Posted by phoinix | Staff • May 22, 2025
expired Posted by phoinix | Staff • May 22, 2025

Express Water Under Sink Reverse Osmosis Alkaline Water Filtration System

+ Free Shipping

$152

$270

43% off
Amazon
93 Comments 58,131 Views
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Deal Details
Update: This popular deal is still available.

Amazon has Express Water Under Sink Reverse Osmosis Alkaline Water Filtration System w/ Faucet & Tank for $151.99. Shipping is free.

Thanks to Deal Hunter phoinix for finding this deal.

Features:
  • Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system filtering up to 99. 99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and more
  • Alkaline Water Filter: Express Water's Alkaline Water Filter with Active Mineral Technology adds Calcium, Potassium, Magnesium, and other minerals to your water
  • Under Sink Water Filter: Don't waste money on professional installation. Express Water's quick and easy-to-understand design means you can install and understand everything about your new water filtration system
  • Quality : Rest easy with our 1-year on all Express Water Reverse Osmosis Water Systems. System dimensions: 17x15x5 inches, Tank dimensions: 15x12x12 inches
  • Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Water's water filtration systems automatically fill your water tank with high quality drinking water

Editor's Notes

Written by StrawMan86 | Staff
  • About this deal:
    • Our research indicates that this offer is $38 lower (20% savings) than the next best available price from a reputable merchant with prices starting from $189.99.
  • About this product:
    • Rating of 4.6 from over 8,300 customer reviews.
  • About this store:

Original Post

Written by phoinix | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Update: This popular deal is still available.

Amazon has Express Water Under Sink Reverse Osmosis Alkaline Water Filtration System w/ Faucet & Tank for $151.99. Shipping is free.

Thanks to Deal Hunter phoinix for finding this deal.

Features:
  • Reverse Osmosis Water Filter: Experience what water should taste like with the Express Water reverse osmosis water filtration system filtering up to 99. 99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and more
  • Alkaline Water Filter: Express Water's Alkaline Water Filter with Active Mineral Technology adds Calcium, Potassium, Magnesium, and other minerals to your water
  • Under Sink Water Filter: Don't waste money on professional installation. Express Water's quick and easy-to-understand design means you can install and understand everything about your new water filtration system
  • Quality : Rest easy with our 1-year on all Express Water Reverse Osmosis Water Systems. System dimensions: 17x15x5 inches, Tank dimensions: 15x12x12 inches
  • Under Sink Water Filter System: No need to mess with refilling or activating your water filter, Express Water's water filtration systems automatically fill your water tank with high quality drinking water

Editor's Notes

Written by StrawMan86 | Staff
  • About this deal:
    • Our research indicates that this offer is $38 lower (20% savings) than the next best available price from a reputable merchant with prices starting from $189.99.
  • About this product:
    • Rating of 4.6 from over 8,300 customer reviews.
  • About this store:

Original Post

Written by phoinix | Staff

Community Voting

Deal Score
+60
Good Deal
Visit Amazon

Price Intelligence

Model: Express Water Alkaline Reverse Osmosis Water Filtration System - 10 Stage RO Mineralizing Purifier - Mineral, pH +, Antioxidant - Under Sink Water Filter with Remineralization - 50 GDP

Deal History 

Sort: Most Recent
Post Date Sold By Sale Price Activity
06/02/25Amazon$141
2
04/15/24Home Depot$152
4
11/21/23Amazon$150
23

Current Prices

Sort: Lowest to Highest | Last Updated 6/26/2025, 10:44 AM
Sold By Sale Price
Amazon$189.99

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Top Comments

Spectropure has been around for a very long time, I had some of their original systems back in the early 2000s when they were $500 for pretty much the same system. Yes they make excellent systems but in this day RO systems really have become very common place and there's no reason to spend extra money on a Spectrapure. One could get one of these cheaper systems and just buy their filters when it gets time to replace. Of course just my opinion.
No big difference. Test the TDS, let the data talk.

92 Comments

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May 24, 2025
861 Posts
Joined Mar 2009
May 24, 2025
lip008
May 24, 2025
861 Posts
Quote from Livyatan :
Head here https://www.nsf.org/certified-products-systems
Then head to Consumer and Retail Products section > Water Filters (click the link)

Then use the search bar and look at a company you're interested in, in this case it's express water. Finally verify the correct cert. I believe its 58 and 53. Then inspect the table and look for the water filter itself, then check out the details.

Hmm i cannot attach a snippet? but if you follow those steps you'll find some info. Hopefully im write..

Thank you!
May 24, 2025
1,586 Posts
Joined Nov 2016
May 24, 2025
opus123
May 24, 2025
1,586 Posts
Quote from Jerry_W :
No big difference. Test the TDS, let the data talk.
My beginning tds is 450 and it is 3 after my Spectrapure RO membrane. I would say that is going to beat anything from this company.
Pro
May 24, 2025
1,804 Posts
Joined Feb 2004
May 24, 2025
Kachur
Pro
May 24, 2025
1,804 Posts
Quote from opus123 :
My beginning tds is 450 and it is 3 after my Spectrapure RO membrane. I would say that is going to beat anything from this company.
This will give you 10-20, quality drinking water is 40-50. I's say I prefer 10-20, have no need for distilled water..
May 24, 2025
4,829 Posts
Joined Feb 2006
May 24, 2025
Azrael_the_Cat
May 24, 2025
4,829 Posts
Quote from sshlyk :
Is there anything wrong with nsf certified fridge filters?
NSF/ANSI Standards 42, 53 and 401

anything wrong with fridge filters? No, but it depends what you want to accomplish.

if you want safe water. it's fine, as tap water is fine (in USA with a few unusual exceptions like flint Michigan)

if your goal is to taste better, a fridge filter is also fine if that makes the water taste good enough for you.

if you don't trust your water company don't trust the government and don't trust water scientists and think that any amount of anything in your water is dangerous then the fridge filters are only ok because reverse osmosis filters are better. from the perspective of being safe by virtue of filtering as much as possible, a refrigerator filter would not be good enough because a reverse osmosis filter is better.

TLDR; it depends on your threshold for taste good enough in your personal belief about how much filtering is safe enough.
Last edited by Azrael_the_Cat May 24, 2025 at 06:50 AM.
1
May 24, 2025
103 Posts
Joined May 2024
May 24, 2025
GreenFang473
May 24, 2025
103 Posts
Been using these since 2014 to filter out fluoride. The main carbon filters need to be replaced about every 10 months for me, and then there is an additional filter that I replace every 2-3 years. Before that I was refilling drinking water at those water refill stations in grocery stores but those things essentially use the same RO filtering methods.

Mine doesn't have the mineral-adding stage, which is really important for RO water. I have had to add minerals manually. I think these are pretty easy to install for the average person. You will have to drill a small hole into your plumbing drain pipe and you'll need your sink to have a hole for the faucet part or be ready to drill a new hole in your sink for that. The tank fits under my sink and takes up about 1/2 my under-sink area.
2
May 24, 2025
103 Posts
Joined May 2024
May 24, 2025
GreenFang473
May 24, 2025
103 Posts
Quote from kickerstarter :
So you reverse osmosis all the impurities away only to add back a bunch of metals in the end?
Trading lead and fluoride for magnesium and potassium is a pretty fair trade.
May 24, 2025
25 Posts
Joined Jul 2019
May 24, 2025
ma1978
May 24, 2025
25 Posts
This has always been $180-$200 max. Inflated prices as usual

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May 24, 2025
391 Posts
Joined Aug 2011
May 24, 2025
XoneSp
May 24, 2025
391 Posts
Anyone know if you can add fluoride back into the water? Please no debate, just need the facts.
1
May 24, 2025
452 Posts
Joined Sep 2009
May 24, 2025
creichle
May 24, 2025
452 Posts
Quote from XoneSp :
Anyone know if you can add fluoride back into the water? Please no debate, just need the facts.

You don't need to add fluoride back. If you are concerned about dental issues consider topical application which is the most effective way to protect your teeth with fluoride. Most municipalities are taking fluoride out of the water supply. You should maybe due some independent research on the topic and see if you still want to do that.
4
May 24, 2025
962 Posts
Joined Jan 2020
May 24, 2025
AmusedScent305
May 24, 2025
962 Posts
Quote from XoneSp :
Anyone know if you can add fluoride back into the water? Please no debate, just need the facts.

Haven't seen any available. Probably because the recommended amount is so little it would be difficult to meter without high cost equipment.

If you have very high fluoride content (>4mg/L) understand that RO systems that run 75-100GPD are less "efficient" at removing contaminants (think 99% vs 95%), so it may not be as much of an issue for you because the result would be within the recommended levels of .7mg/L or less, especially since different systems can be more or less efficient at removing fluoride in particular: you'll have to check the individual system's filtration rate on specific contaminants to be sure.
May 24, 2025
814 Posts
Joined Dec 2009
May 24, 2025
hellagrant
May 24, 2025
814 Posts
The 100gpd version is only $15 more. I think it is the same system, just a bigger storage tank maybe.
May 25, 2025
5 Posts
Joined Nov 2010
May 25, 2025
theninjai
May 25, 2025
5 Posts
Quote from itssskyky :
in for one on the $141 version with extra filter set and no ALK filter, and got separate alkaline filters >$12 ea. Thanks OP
Great idea! Where did you find alkaline filters for >$12 ea? I'm showing $39 for the express water brand on Amazon. Thanks in advance!
May 25, 2025
277 Posts
Joined May 2016
May 25, 2025
Gibletz
May 25, 2025
277 Posts
Quote from opus123 :
My beginning tds is 450 and it is 3 after my Spectrapure RO membrane. I would say that is going to beat anything from this company.

I have the non-alkaline version of this. My city tap water is 357 tds, 7 tds after filter.

Also realized in looking this up I haven't changed my filters in 2.5 years.


I recommend this instead of the included saddle tap. it's a bit pricey but if you have a dishwasher, it saves you from making a leak prone hole in your drain pipe.
https://a.co/d/eEptSb5
Last edited by Gibletz May 24, 2025 at 10:31 PM.
May 25, 2025
1,342 Posts
Joined Oct 2017
May 25, 2025
kickerstarter
May 25, 2025
1,342 Posts
Quote from GreenFang473 :
Trading lead and fluoride for magnesium and potassium is a pretty fair trade.
How about removing lead only and leave all the existing minerals alone at a fraction of the dollar?
1

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May 26, 2025
194 Posts
Joined May 2007
May 26, 2025
johnebe
May 26, 2025
194 Posts
Quote from ma1978 :
This has always been $180-$200 max. Inflated prices as usual

Home Depot has these and they seem to be listing the REAL retail prices... and why is the 100 gallon per day model, here, only $10 more, with a list price of $189 and NO oversized, in your face, red, 44% Off... surprised it's not blinking.
This kind of marketing should be illegal. Suckers...

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