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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 82,308 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

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

Deal Score

+160

Visit Amazon

Price Intelligence

Model: Waterdrop Reverse Osmosis Water Filtration System

Deal History

Sale Price

Slickdeal

$NaN

Today

Post Date	Sold By	Sale Price	Activity
09/30/24	Amazon	$191	0
05/04/21	Amazon	$254	0
02/15/21	Amazon	$255 Popular	48
11/24/20	Amazon	$240	4
10/13/20	Amazon	$225	2
09/29/20	Amazon	$240	7
08/10/20	Amazon	$240	8

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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

Punker1234

Mar 25, 2026 07:27 PM

412 Posts

Joined Sep 2007

Punker1234Mar 25, 2026 07:27 PM

412 Posts

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

Had this thing since 2021. Super solid unit. TDS creep exists but thats most undersink RO systems.

JoshiJ12

Mar 25, 2026 08:02 PM

11 Posts

Joined Dec 2013

JoshiJ12Mar 25, 2026 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?

Punker1234

Mar 25, 2026 08:35 PM

412 Posts

Joined Sep 2007

Punker1234Mar 25, 2026 08:35 PM

412 Posts

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

Quote from JoshiJ12

Are the replacement filters expensive?

fotofinish348

Mar 26, 2026 12:11 PM

45 Posts

Joined Nov 2019

fotofinish348Mar 26, 2026 12:11 PM

45 Posts

Is this good

tommytg

Mar 26, 2026 01:42 PM

34 Posts

Joined Apr 2009

tommytgMar 26, 2026 01:42 PM

34 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.

Mar 26, 2026 03:44 PM

87 Posts

Joined Sep 2016

This comment has been rated as unhelpful by Slickdeals users.

test_subj

Mar 26, 2026 03:55 PM

472 Posts

Joined Oct 2003

test_subjMar 26, 2026 03:55 PM

472 Posts

Tempted, but the only power under my sink is for the disposal. Needing an active plug under the sink kills it for me.

Mar 26, 2026 04:09 PM

7,378 Posts

Joined Sep 2014

This comment has been rated as unhelpful by Slickdeals users.

Cheesecycle

Mar 26, 2026 04:10 PM

543 Posts

Joined Jan 2008

CheesecycleMar 26, 2026 04:10 PM

543 Posts

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

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?

alphawave

Pro

Mar 26, 2026 04:17 PM

1,663 Posts

Joined Dec 2005

alphawave

Pro

Mar 26, 2026 04:17 PM

1,663 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.

Type-E

Mar 26, 2026 04:21 PM

71 Posts

Joined Jul 2004

Type-EMar 26, 2026 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.

BoastfulMeat152

Mar 26, 2026 05:06 PM

35 Posts

Joined Dec 2020

BoastfulMeat152Mar 26, 2026 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?

GreyRiver608

Mar 26, 2026 05:10 PM

110 Posts

Joined May 2018

GreyRiver608Mar 26, 2026 05:10 PM

110 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

ccbadd

Mar 26, 2026 05:17 PM

10 Posts

Joined Jan 2012

ccbaddMar 26, 2026 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.

Ride_The_Sky

Mar 26, 2026 05:26 PM

15,522 Posts

Joined Jan 2010

Ride_The_SkyMar 26, 2026 05:26 PM

15,522 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..

Unregistered (You)

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Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

$187

$300

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Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

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