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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 82,547 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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Sort: Lowest to Highest | Last Updated 4/5/2026, 11:38 PM
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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 26, 2026 05:26 PM
57 Posts
Joined Apr 2022
NervousPiranha982Mar 26, 2026 05:26 PM
57 Posts
How is this Waterdrop model G5P500 for $189 not a better deal?
https://a.co/d/0iPvKZBq
Mar 26, 2026 05:27 PM
15,522 Posts
Joined Jan 2010
Ride_The_SkyMar 26, 2026 05:27 PM
15,522 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].
Got a link? Also if it's not OEM I wouldn't bother. TDS is not the only indication of quality unless it is reading zero.
1
Mar 26, 2026 05:37 PM
127 Posts
Joined Apr 2015
deepaksn1Mar 26, 2026 05:37 PM
127 Posts
Anyone know how to drill hole in granite countertop to install water dispenser? What tools needed and can first time driller will able to do it?
1
Mar 26, 2026 05:37 PM
2,155 Posts
Joined Jul 2008
kfunk7Mar 26, 2026 05:37 PM
2,155 Posts
Quote from GreyRiver608 :
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
Unit has an electric pump to push the water through filters.
Mar 26, 2026 05:42 PM
412 Posts
Joined Sep 2007
Punker1234Mar 26, 2026 05:42 PM
412 Posts

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

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.
Had the same issue. So I wired my disposal to one air pressure buttons (super common for this setup) which you can buy on amazon. Here [a.co]for example.
1
Mar 26, 2026 05:43 PM
5,095 Posts
Joined Feb 2006
Azrael_the_CatMar 26, 2026 05:43 PM
5,095 Posts
Quote from deepaksn1 :
Anyone know how to drill hole in granite countertop to install water dispenser? What tools needed and can first time driller will able to do it?
Specialized diamond bits. Working granite counters SUCKS.
1
Mar 26, 2026 05:44 PM
2,155 Posts
Joined Jul 2008
kfunk7Mar 26, 2026 05:44 PM
2,155 Posts
Quote from deepaksn1 :
Anyone know how to drill hole in granite countertop to install water dispenser? What tools needed and can first time driller will able to do it?
You would need a variable speed drill and diamond hole saw bit. Just remember to use light pressure and keep it wet with water so it doesn't overheat.

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Mar 26, 2026 05:45 PM
412 Posts
Joined Sep 2007
Punker1234Mar 26, 2026 05:45 PM
412 Posts
Quote from deepaksn1 :
Anyone know how to drill hole in granite countertop to install water dispenser? What tools needed and can first time driller will able to do it?
You just need to buy the appropriate bit on Amazon. This is what i bought here [a.co]
1
1
Mar 26, 2026 06:09 PM
1 Posts
Joined Mar 2023
HonestManatee6623Mar 26, 2026 06:09 PM
1 Posts

Our community has rated this post as helpful. If you agree, why not thank HonestManatee6623

Quote from SrMoreSun :
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.
It is an additional cost, but they do have other colors available. https://www.amazon.com/dp/B0CX4THBJ2
Last edited by LannieQ March 26, 2026 at 11:11 AM.
2
Mar 26, 2026 06:15 PM
736 Posts
Joined Jan 2009
Boost_addictMar 26, 2026 06:15 PM
736 Posts
I have had the Waterdrop G2P600 and its a nice little unit although I wish I had stocked up on filters before tariffs seem to have doubled their price over the last couple years.
Mar 26, 2026 07:31 PM
1,250 Posts
Joined Jun 2006
howdydoMar 26, 2026 07:31 PM
1,250 Posts
Quote from NervousPiranha982 :
How is this Waterdrop model G5P500 for $189 not a better deal?
https://a.co/d/0iPvKZBq
good question
3
Mar 26, 2026 07:37 PM
202 Posts
Joined Mar 2010
shruggingMar 26, 2026 07:37 PM
202 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.
So you're saying the filtration is better on the G5P500, especially flouride? How does the flow rate compare on each? I am comfortable with the extra loss being 2:1.
Mar 26, 2026 07:45 PM
505 Posts
Joined Aug 2008
chunmanc123Mar 26, 2026 07:45 PM
505 Posts
Quote from NervousPiranha982 :
How is this Waterdrop model G5P500 for $189 not a better deal?
https://a.co/d/0iPvKZBq
I also think the G5P500 for $189 is a better deal than G2 unless you really care about water waste. G5P500 is 2:1 and G2 is 1:1 (less water waste)
3
Mar 26, 2026 08:22 PM
497 Posts
Joined Mar 2012
LivyatanMar 26, 2026 08:22 PM
497 Posts
make sure this filters forever plastics

a lot of water filters do not
there's also a website that rates or certs water filters too
3

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Mar 26, 2026 08:38 PM
31 Posts
Joined Nov 2010
teddebeeMar 26, 2026 08:38 PM
31 Posts

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

Quote from chunmanc123 :
I also think the G5P500 for $189 is a better deal than G2 unless you really care about water waste. G5P500 is 2:1 and G2 is 1:1 (less water waste)
2:1 is more efficient than 1:1 despite what others may have posted.
2

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