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frontpageRed_Liz | Staff posted Yesterday 04:15 PM
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frontpageRed_Liz | Staff posted Yesterday 04:15 PM

Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

+ Free S&H

$187

$300

37% off
Amazon
32 Comments 13,801 Views
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Deal Details
WaterdropDirect via Amazon has Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System (WD-G2-W) on sale for $199 - $11.95 (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 megakimcheelove | 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
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Deal Details
Community Notes
About the Poster
WaterdropDirect via Amazon has Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System (WD-G2-W) on sale for $199 - $11.95 (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 megakimcheelove | 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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Sort: Lowest to Highest | Last Updated 3/26/2026, 09:29 AM
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Amazon$199

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Top Comments

Punker1234
406 Posts
82 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].

32 Comments

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Yesterday 07:27 PM
405 Posts
Joined Sep 2007
Punker1234Yesterday 07:27 PM
405 Posts
Had this thing since 2021. Super solid unit. TDS creep exists but thats most undersink RO systems.
Yesterday 08:02 PM
11 Posts
Joined Dec 2013
JoshiJ12Yesterday 08:02 PM
11 Posts
Quote from Punker1234 :
Had this thing since 2021. Super solid unit. TDS creep exists but thats most undersink RO systems.
Are the replacement filters expensive?
Yesterday 08:35 PM
405 Posts
Joined Sep 2007
Punker1234Yesterday 08:35 PM
405 Posts

Our community has rated this post as helpful. If you agree, why not thank Punker1234

Quote from JoshiJ12 :
Are the replacement filters expensive?
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].
3
2
Today 12:11 PM
42 Posts
Joined Nov 2019
fotofinish348Today 12:11 PM
42 Posts
Is this good
2
Today 01:42 PM
31 Posts
Joined Apr 2009
tommytgToday 01:42 PM
31 Posts
If the claim of 1:1 vs 1:4 is true, I figure it will pay for itself in about a year. In for 1.
Today 03:44 PM
87 Posts
Joined Sep 2016
SrMoreSunToday 03:44 PM
87 Posts
They need to expand the faucet color selection (eg, black and gold). Having a silver faucet with another color combo is diabolical! If they do expand, I would've bought one a looooong time ago.
Today 03:55 PM
464 Posts
Joined Oct 2003
test_subjToday 03:55 PM
464 Posts
Tempted, but the only power under my sink is for the disposal. Needing an active plug under the sink kills it for me.

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Today 04:09 PM
7,361 Posts
Joined Sep 2014
MostBasedToday 04:09 PM
7,361 Posts
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.
Last edited by MostBased March 26, 2026 at 09:18 AM.
1
2
Today 04:10 PM
538 Posts
Joined Jan 2008
CheesecycleToday 04:10 PM
538 Posts
Quote from test_subj :
Tempted, but the only power under my sink is for the disposal. Needing an active plug under the sink kills it for me.
Curious how else you would expect to power it?
Pro
Today 04:17 PM
1,659 Posts
Joined Dec 2005
alphawave
Pro
Today 04:17 PM
1,659 Posts
Quote from test_subj :
Tempted, but the only power under my sink is for the disposal. Needing an active plug under the sink kills it for me.
If a common double outlet, often the switch only controls one of the outlets..be sure to test.
Today 04:21 PM
71 Posts
Joined Jul 2004
Type-EToday 04:21 PM
71 Posts
Quote from Cheesecycle :
Curious how else you would expect to power it?
Regular RO filters simply use water pressure to operate.
Today 05:06 PM
35 Posts
Joined Dec 2020
BoastfulMeat152Today 05:06 PM
35 Posts
Quote from Type-E :
Regular RO filters simply use water pressure to operate.
what is the power source doing for this unit then?
Today 05:10 PM
104 Posts
Joined May 2018
GreyRiver608Today 05:10 PM
104 Posts
Quote from BoastfulMeat152 :
what is the power source doing for this unit then?
would be interested to know as well. i have seen this on sale a few times sparsely, been wanting to switch over but haven't gotten the drive yet
Today 05:17 PM
10 Posts
Joined Jan 2012
ccbaddToday 05:17 PM
10 Posts
Quote from BoastfulMeat152 :
what is the power source doing for this unit then?
This unit has a built in pump that requires power. I have an older version and plumbed it to my fridge for water and ice. Works great where my old setup without a pump barely got any water to the fridge.

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Today 05:26 PM
15,482 Posts
Joined Jan 2010
Ride_The_SkyToday 05:26 PM
15,482 Posts
Quote from JoshiJ12 :
Are the replacement filters expensive?
This should be default required in for for anything that needs replacement filters. Air purifiers, water filters, etc..

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