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ranvocd 31.1K Views
Oct 1, 2026 10:54 PM

Express Water NSF Certified Reverse Osmosis 5-Stage Water Filtration System

$96

$232

58% off
+ Free S&H w/ Amazon Primeat Woot!
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Deal Details
Woot! has Express Water NSF Certified Reverse Osmosis 5-Stage Water Filtration System (RO5DX) for $95.89. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Thanks to Community Member ranvocd for finding this deal.

Features:
  • REVERSE OSMOSIS SYSTEM: Ditch the pitcher water filter. Experience what water should taste like with the Express Water reverse osmosis water filtration system reducing up to 99.99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and much more.
  • WATER PURIFICATION SYSTEM: Drink the healthiest water on Earth right in your own home. All our water filters are specially engineered to work together, producing incredibly pure and crisp best tasting water you'll ever drink.
  • UNDER-SINK WATER FILTER: Don't waste money on professional installation. Express Water's quick & easy-to-understand design can easily be installed yourself. Countertop and tankless RO Systems rely on pumps that are quick to fail. NO electricity required!
  • PFAS FILTRATION: Effectively filters harmful 99.9% of impurities from drinking water such as PFAs/PFOs, micro-plastics, lead, mercury, arsenic, fluoride, chlroine, chromium and much more
  • COMPLETE RO SYSTEM: Everything needed to install (except tools) are included with your new ro system, including a extra value leak detector plus extra filter set - an unbeatable value!
  • CUSTOM RO WATER FILTER: Express Water home water filtration systems are fully upgradable and customizable with quick connecting fittings. Try additional filtration attachments including UV, Alkaline Water Filter, Deionization Water Filter
  • WHOLE HOUSE UPGRADE: Consider one of our top-tier whole house water filtration systems! Whether you want to protect your home/appliances, or improve the health of your skin, we have a solution for you! Search on Amazon "Express Water Ultimate Protection".

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • Our research indicates that this deal is $61.60 less (39% savings) than the next best available price from a reputable merchant with prices starting from $157.49 at the time of this post.
  • About this store:

Original Post

Written by ranvocd
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Woot! has Express Water NSF Certified Reverse Osmosis 5-Stage Water Filtration System (RO5DX) for $95.89. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Thanks to Community Member ranvocd for finding this deal.

Features:
  • REVERSE OSMOSIS SYSTEM: Ditch the pitcher water filter. Experience what water should taste like with the Express Water reverse osmosis water filtration system reducing up to 99.99% of Lead, Chlorine, Fluoride, PFAs/PFOs, Calcium, Arsenic, and much more.
  • WATER PURIFICATION SYSTEM: Drink the healthiest water on Earth right in your own home. All our water filters are specially engineered to work together, producing incredibly pure and crisp best tasting water you'll ever drink.
  • UNDER-SINK WATER FILTER: Don't waste money on professional installation. Express Water's quick & easy-to-understand design can easily be installed yourself. Countertop and tankless RO Systems rely on pumps that are quick to fail. NO electricity required!
  • PFAS FILTRATION: Effectively filters harmful 99.9% of impurities from drinking water such as PFAs/PFOs, micro-plastics, lead, mercury, arsenic, fluoride, chlroine, chromium and much more
  • COMPLETE RO SYSTEM: Everything needed to install (except tools) are included with your new ro system, including a extra value leak detector plus extra filter set - an unbeatable value!
  • CUSTOM RO WATER FILTER: Express Water home water filtration systems are fully upgradable and customizable with quick connecting fittings. Try additional filtration attachments including UV, Alkaline Water Filter, Deionization Water Filter
  • WHOLE HOUSE UPGRADE: Consider one of our top-tier whole house water filtration systems! Whether you want to protect your home/appliances, or improve the health of your skin, we have a solution for you! Search on Amazon "Express Water Ultimate Protection".

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • Our research indicates that this deal is $61.60 less (39% savings) than the next best available price from a reputable merchant with prices starting from $157.49 at the time of this post.
  • About this store:

Original Post

Written by ranvocd

Community Voting

Deal Score
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Community Reviews

This Express Water 5-stage reverse osmosis system is praised for strong filtration, clean-tasting water, and a straightforward under-sink install. The included filters and common-size parts make maintenance feel manageable, and the system has a solid long-term track record with no leaks in several setups. The main caveats are water pressure and waste water, since the membrane needs good incoming pressure and the 1:4 waste ratio can be inefficient without a booster or permeate pump. Filter compatibility and replacement costs also matter, especially if you want standard-size parts or plan to add an alkaline stage.

Common Questions (5)

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68 Comments

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Pro
Oct 1, 2026 11:00 PM
3.9K Comments
Joined Apr 2014
eekster
Pro
Oct 1, 2026 11:00 PM
3.9K Comments
Very good price as long as the filters are standard size.
Oct 1, 2026 11:25 PM
375 Comments
Joined Aug 2025
CalmShoe2276Oct 1, 2026 11:25 PM
375 Comments
Make sure you have good water pressure to get the water through the membrane
Pro
Oct 1, 2026 11:38 PM
3.9K Comments
Joined Apr 2014
eekster
Pro
Oct 1, 2026 11:38 PM
3.9K Comments
Quote from CalmShoe2276 View quoted comment :
Make sure you have good water pressure to get the water through the membrane
You can get a pump if pressure is to low. Oh add a pressure gauge, don't look like it has one.
Oct 2, 2026 12:20 AM
60 Comments
Joined Nov 2013
SpawnlingOct 2, 2026 12:20 AM
60 Comments
Very good deal IMO .
I have this set with the added alkaline mineralization, purchased 2 years ago for about $200. The filters when purchasing a one year replacement set are decent at $110...
Oct 2, 2026 12:27 AM
162 Comments
Joined Feb 2014
ryanistheryanOct 2, 2026 12:27 AM
162 Comments
Quote from Spawnling View quoted comment :
Very good deal IMO . I have this set with the added alkaline mineralization, purchased 2 years ago for about $200. The filters when purchasing a one year replacement set are decent at $110...
Sounds like it'd be cheaper to buy multiple sets then.
Oct 2, 2026 12:34 AM
1.8K Comments
Joined Aug 2011
stone_Oct 2, 2026 12:34 AM
1.8K Comments
are they standard size, which i can use on my current system?
Oct 2, 2026 12:42 AM
6.5K Comments
Joined Dec 2009
wwjrdOct 2, 2026 12:42 AM
6.5K Comments
For something like this is cost of ownership the real factor? How does this one fare?
1

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Oct 2, 2026 12:47 AM
3.8K Comments
Joined Dec 2015
Mikster1Oct 2, 2026 12:47 AM
3.8K Comments
Wow, so freaking cheap and the added filters are a bonus!

Just worried about quality, hope it doesn't leak, only 2 reviews on Amazon but another user on here vouched for it. I would pull the trigger if I didn't already have one
Last edited by Mikster1 October 1, 2026 at 06:49 PM.
Oct 2, 2026 12:47 AM
15 Comments
Joined Dec 2013
JoshiJ12Oct 2, 2026 12:47 AM
15 Comments
Is this a under countertop thing where a hole needs to be currently in the countertop or sink setup?
Oct 2, 2026 12:55 AM
101 Comments
Joined Aug 2019
AlenbOct 2, 2026 12:55 AM
101 Comments
Got this maybe 10 months ago. Didn't have any problems Thinking now should I get this just for filters
Oct 2, 2026 1:00 AM
286 Comments
Joined Mar 2017
JasoNB2773Oct 2, 2026 1:00 AM
286 Comments
I've had an express water system for 6 years. Zero complaints
Oct 2, 2026 1:03 AM
147 Comments
Joined Apr 2014
20KMOct 2, 2026 1:03 AM
147 Comments
can one easily add an alkaline filter to it? what would you need besides the alkaline
Oct 2, 2026 1:04 AM
10 Comments
Joined May 2018
TenseMitten167Oct 2, 2026 1:04 AM
10 Comments
Quote from JoshiJ12 View quoted comment :
Is this a under countertop thing where a hole needs to be currently in the countertop or sink setup?
Yes, these are typically installed under the kitchen sink. The little faucet needs a hole in the counter or sink.
1
Oct 2, 2026 1:16 AM
5.1K Comments
Joined Jan 2004
Samwise GamgeeOct 2, 2026 1:16 AM
5.1K Comments
Can I install this at my laundry sink?

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Oct 2, 2026 1:17 AM
74 Comments
Joined Nov 2020
Mr.M5070Oct 2, 2026 1:17 AM
74 Comments
HD has 450+ ratings with 4.7 stars.. Its a good deal considering extra filters as well
https://www.homedepot.com/p/Expre.../307338516

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Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!