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expiredRed_Liz | Staff posted Mar 25, 2026 04:15 PM
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expiredRed_Liz | Staff posted Mar 25, 2026 04:15 PM

Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

+ Free S&H

$187

$300

37% off
Amazon
136 Comments 82,091 Views
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Update: This popular deal is still available.

WaterdropDirect via Amazon has Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System (WD-G2-W) on sale for $199 - $11.95 when you apply promo code G2WAAERM at checkout = $187.05. Shipping is free.
  • Note: You must be logged in to apply promo codes; promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.
Thanks to staff member Red_Liz for finding this deal.

Editor's Notes

Written by qwikwit | Staff
  • This offer is $92.94 lower (33% savings) than previous Front Page deal that earned 57+ thumbs up.
  • 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.
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

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

WaterdropDirect via Amazon has Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System (WD-G2-W) on sale for $199 - $11.95 when you apply promo code G2WAAERM at checkout = $187.05. Shipping is free.
  • Note: You must be logged in to apply promo codes; promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.
Thanks to staff member Red_Liz for finding this deal.

Editor's Notes

Written by qwikwit | Staff
  • This offer is $92.94 lower (33% savings) than previous Front Page deal that earned 57+ thumbs up.
  • 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.
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by Red_Liz | Staff

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Model: Waterdrop Reverse Osmosis Water Filtration System

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Top Comments

Punker1234
412 Posts
86 Reputation
They are. one of them is liek $40 and another i believe is $95. The good news? I haven't replace a filter and my unit still spits out 12 TDS/PPM water. so unless you're using an insane amount of water, i think the filters will last you awhile. When i installed my unit, I put a $20 inline TDS meter so i can see what it's spitting out. Here [amazon.com].
Type-E
71 Posts
22 Reputation
Regular RO filters simply use water pressure to operate.
teddebee
31 Posts
10 Reputation
2:1 is more efficient than 1:1 despite what others may have posted.

136 Comments

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Mar 29, 2026 09:04 PM
6,326 Posts
Joined Aug 2010
gamingdroidMar 29, 2026 09:04 PM
6,326 Posts

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

In case it matters to anyone, I just found out that Waterdrop is actually a Chinese company, and AI says:

"Waterdrop is described as a Chinese company with registered addresses in California and Colorado that ships products directly into Amazon iSpringWaterdrop. The company claims to be based in California but has no visible information about owners or US-based employees, with LinkedIn showing only China-based employees Waterdrop."
1
2
Mar 29, 2026 09:10 PM
860 Posts
Joined Dec 2006
t.i.Mar 29, 2026 09:10 PM
860 Posts
I am surprised this hasn't been discussed anywhere... does this have enough pressure and volume for a fridge ice maker?
Mar 30, 2026 04:42 AM
168 Posts
Joined Nov 2015
19DealsMar 30, 2026 04:42 AM
168 Posts
Quote from MostBased :
Actually, I was mistaken in my previous post. 2:1 means 2 parts clean water to 1 part wasted water, so 2:1 is twice as efficient as 1:1.

The best modern RO purifiers are 3:1, like the $200 Stokk S2 that matches the specs of the much more expensive Waterdrop G3P800. It costs only $50 more to upgrade to this new unit than to buy replacement filters for my G2, so that's what I'm doing.

"The Stokk S2 800 GPD is a high-performance, budget-friendly system that offers double the water production of the Waterdrop G2. While the Waterdrop G2 is a well-established model known for long-term reliability, the Stokk S2 provides much better efficiency and more modern features for a similar price point." - AI summary
Can anyone chime in on the nsf certification? Stokk has nsf 42 vs 372 for this system
Mar 30, 2026 04:57 AM
12 Posts
Joined Apr 2016
venkateshapMar 30, 2026 04:57 AM
12 Posts
Quote from Squirrelcop :
I had to do it for my install and found a great DIY vid on YouTube. Easier than I expected
Please share the YouTube link
Mar 30, 2026 09:56 AM
168 Posts
Joined Nov 2015
charly_beMar 30, 2026 09:56 AM
168 Posts
I like purified water but not sure about the osmosis because also takes out good minerals from water, any comments about this?
Mar 30, 2026 01:38 PM
315 Posts
Joined Jun 2015
DarkFighterMar 30, 2026 01:38 PM
315 Posts
can this be used in apartments?
Mar 30, 2026 02:16 PM
8,005 Posts
Joined Mar 2005
flangomangoMar 30, 2026 02:16 PM
8,005 Posts
Quote from NervousPiranha982 :
How is this Waterdrop model G5P500 for $189 not a better deal?
https://a.co/d/0iPvKZBq
Thanks for posting, this one is 100% a better deal. $2 more and uses half the amount of water. Everything else is the same.

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Mar 30, 2026 02:52 PM
498 Posts
Joined Feb 2009
Hamburgerler71Mar 30, 2026 02:52 PM
498 Posts
I am new to all of this. House hold of 6 and we currently have a Zero water Dispenser with two filter in it. I have to replace the filters like every 4 months and these this are expensive! Would the G5P500 be a good option for us or does anyone know a better system to meet our needs. I am mostly concerned about micro plastics and PFAS. We have had our water tested in the past with no issues of heavy metals or Rust or sediment. We do have fairly hard water though. thanks
Mar 30, 2026 02:54 PM
25 Posts
Joined Jun 2023
SociableWing1460Mar 30, 2026 02:54 PM
25 Posts
Will this be sufficient to filter well water? If not any suggestions?
Mar 30, 2026 02:59 PM
418 Posts
Joined Mar 2014
CagnyMar 30, 2026 02:59 PM
418 Posts
Great price for this. I've wanted to get one but my city is installing a city-wide RO and I'm hoping it'll be good enough to avoid getting a personal one.
Mar 30, 2026 04:43 PM
45 Posts
Joined Nov 2020
mibsomethingMar 30, 2026 04:43 PM
45 Posts
wow, deal is too good to be true... guess, you get what you pay for
Mar 30, 2026 06:45 PM
119 Posts
Joined Nov 2014
Heckmaster9Mar 30, 2026 06:45 PM
119 Posts
Quote from MostBased :
I own this one. I had a APEC old school unit previously. Water comes out very slowly from this one in comparison. I heard they addressed this with the newer units. Also, the G2 is NOT NSF/ANSI Standard 58 certified, which means it does not remove fluoride as much as the certified units, maybe ~85-95%. To reach that 1:1 drain ratio, the G2 likely uses a "looser" membrane or operates at a pressure where it doesn't reject quite as many ions as a 2:1 system would - this is the compromise. The Waterdrop G5P500 is 500 gallons per day (vs G2 400 GPD) and NSF/ANSI Standard 58 certified, but has a 2:1 drain ratio at a similar price point: https://a.co/d/0fqFrGxw If I could do it over, I would go for 100% flouride free drinking water over the 1:1 ratio - unless I lived in California, of course.
Why would you want fluoride to be removed?
Mar 30, 2026 06:56 PM
8,005 Posts
Joined Mar 2005
flangomangoMar 30, 2026 06:56 PM
8,005 Posts
Quote from Punker1234 :

They are. one of them is liek $40 and another i believe is $95. The good news? I haven't replace a filter and my unit still spits out 12 TDS/PPM water. so unless you're using an insane amount of water, i think the filters will last you awhile. When i installed my unit, I put a $20 inline TDS meter so i can see what it's spitting out. Here [amazon.com].
How long has it been since you haven't replaced a filter?
Mar 30, 2026 06:57 PM
8,005 Posts
Joined Mar 2005
flangomangoMar 30, 2026 06:57 PM
8,005 Posts
Quote from SociableWing1460 :
Will this be sufficient to filter well water? If not any suggestions?
I would get 8 stage + UV sterilization

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Mar 30, 2026 07:03 PM
8,005 Posts
Joined Mar 2005
flangomangoMar 30, 2026 07:03 PM
8,005 Posts
Quote from gamingdroid :
In case it matters to anyone, I just found out that Waterdrop is actually a Chinese company, and AI says:

"Waterdrop is described as a Chinese company with registered addresses in California and Colorado that ships products directly into Amazon iSpringWaterdrop. The company claims to be based in California but has no visible information about owners or US-based employees, with LinkedIn showing only China-based employees Waterdrop."
What's the point? DJI is a Chinese company, you think they don't make good drones? Roborock is a Chinese company, you don't think they make good robot vacuums? Don't fall for the anti-Chinese Washington machine.
6

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