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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 82,232 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 31, 2026 03:42 PM
118 Posts
Joined Sep 2021
SmartHill5061Mar 31, 2026 03:42 PM
118 Posts
Quote from downonfarm :
The video for this air switch shows it connecting to an outlet under the sink. So how would this help someone that doesn't have an outlet under the sink?
waterdrop asks outlet as it uses the electric pump to save space, better flow, and more better quality of water by flowing fresh water. Now, I had a same case where I do not have a outlet, but there is outlet at the wall on counter top, you can indeed make extended electrical outlet. so walmart to simply buy cheaper outlet, and cut the middle, and connect back after putting the electric wire inside the cabinet. and use it as it is.
Mar 31, 2026 05:28 PM
18 Posts
Joined Sep 2018
TRS8588Mar 31, 2026 05:28 PM
18 Posts
Quote from tommytg :
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.
How much water are you drinking, holy moly!
Mar 31, 2026 05:32 PM
588 Posts
Joined Jun 2008
tooquickMar 31, 2026 05:32 PM
588 Posts
Quote from flangomango :
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.

The point is they claim to be American and California based, they shouldn't lie if its purely based in China.
1
Mar 31, 2026 05:35 PM
588 Posts
Joined Jun 2008
tooquickMar 31, 2026 05:35 PM
588 Posts
Quote from UserNameChecksOut :
These comments are so funny when theres case after case of American companies routinely deceiving & endangering American consumers. The best part & is when they pay settlement to absolve themselves of what they've done & admit no wrongdoing. Those fines are built into their bottom line, which is why they'll never change. Keep worrying about big bad China tho lol

OPs point was that you wouldn't be able to have the same legal recourse if they lied and are actually based in China.
1
Mar 31, 2026 05:36 PM
588 Posts
Joined Jun 2008
tooquickMar 31, 2026 05:36 PM
588 Posts
Quote from vo_danh :
This is insane. Just buy the dispenser for like $25 on amazon and use a 5 year in line filter... JFC.

This is what I've been doing. Starting to wonder if it's better though to get one that eliminates more of the "bad stuff"?
Mar 31, 2026 05:39 PM
18 Posts
Joined Sep 2018
TRS8588Mar 31, 2026 05:39 PM
18 Posts

Our community has rated this post as helpful. If you agree, why not thank TRS8588

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
A "normal" RO system uses the pressure in your water line to force the water through the RO membrane. Ha, free power, thanks water company! But it uses that same water line to also clean the filter and flush all the impurities down the drain. As it so happens, it takes about 4 liters of flushing/waste to generate 1 liter of purified water. Wap waaaap, the water company wins in the end.This unit uses an electric pump to generate pressure. So, you're essentially using electricity to force the water through the membrane, and as it so happens, you end up using much less water. About 1 liter of waste/flush for every liter of purified water generated.If you're like my family, we use probably 4-5 gallons of purified water a day. Times 365 days times (4-1) gallons =3 gallons = around 5,000 gallons of water per year we'd save by switching to this unit.Our rate for water/sewer end up being about $7/hcf, so we'd save roughly $50 in water per year. There would be some small electricity increase though, maybe $5-10 for the year.
2
Mar 31, 2026 05:49 PM
5 Posts
Joined Dec 2022
computermod14Mar 31, 2026 05:49 PM
5 Posts
Quote from JoshiJ12 :
Are the replacement filters expensive?
Not compared to purchasing bottled water!
1
1

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Pro
Apr 01, 2026 02:41 AM
2,692 Posts
Joined Dec 2004
DealzRGood4U
Pro
Apr 01, 2026 02:41 AM
2,692 Posts
Quote from downonfarm :
The video for this air switch shows it connecting to an outlet under the sink. So how would this help someone that doesn't have an outlet under the sink?
If you have a garbage disposal under the sink, it's pretty easy to add an outlet.
Apr 01, 2026 07:17 AM
296 Posts
Joined Apr 2019
Shadow_HeirApr 01, 2026 07:17 AM
296 Posts
Cool.
Apr 01, 2026 12:40 PM
108 Posts
Joined Apr 2005
honvlApr 01, 2026 12:40 PM
108 Posts
Quote from NervousPiranha982 :
How is this Waterdrop model G5P500 for $189 not a better deal?
https://a.co/d/0iPvKZBq
The CF filter for the new one only lasts 6 months instead of 12
Apr 01, 2026 01:28 PM
2,094 Posts
Joined May 2011
jugernotApr 01, 2026 01:28 PM
2,094 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?
If you're asking this, hire someone.
Apr 01, 2026 01:40 PM
1,216 Posts
Joined Apr 2015
TPMJBApr 01, 2026 01:40 PM
1,216 Posts
Quote from Marceille :
1000-1300 is insane. I used to take my tds meter around the country wherever I'd go and test the local tap water, and while Folsom, CA was the lowest at 25ppm, San Jose was the highest I saw at 450-475.
Mine is around 800 in Texas. Best money I've spent is getting a lab to actually analyze my water for all the impurities (only 75 clams). Some lead, some arsenic, absolutely zero hardness, and a ton of Sodium, which is why it tastes like saline. People up North don't realize how life-changing RO is for drinking water.
But with zero hardness, the filters last a really long time. If I didn't already have a tank unit, I'd get this. When I got my tank unit, the technology for the tankless units wasn't quite there. Not sure if this is still the case. But protip - pipe into your fridge. It's a lot easier and will also supply your ice maker.
Apr 02, 2026 04:07 PM
1,547 Posts
Joined Feb 2008
MarceilleApr 02, 2026 04:07 PM
1,547 Posts
Quote from TPMJB :
Mine is around 800 in Texas. Best money I've spent is getting a lab to actually analyze my water for all the impurities (only 75 clams). Some lead, some arsenic, absolutely zero hardness, and a ton of Sodium, which is why it tastes like saline. People up North don't realize how life-changing RO is for drinking water.
But with zero hardness, the filters last a really long time. If I didn't already have a tank unit, I'd get this. When I got my tank unit, the technology for the tankless units wasn't quite there. Not sure if this is still the case. But protip - pipe into your fridge. It's a lot easier and will also supply your ice maker.
Very high but doesn't sound horrific with those actual water content results. Our town provides those water testing results each year that are done by a 3rd party company, but they don't test for pfas or meds, which RO is going to help remove most of. I put mine through the fridge too, a no brainer, as much ice and dispensing as we use (and basically never need to change fridge filter), but I did have to keep the pressure up or it wouldn't work properly. I definitely like this convenient cartridge system here, but not sure how the cost compares, as 5-stage 3-year replacement kits are about $125.
Apr 02, 2026 11:58 PM
8,005 Posts
Joined Mar 2005
flangomangoApr 02, 2026 11:58 PM
8,005 Posts
Quote from tooquick :

OPs point was that you wouldn't be able to have the same legal recourse if they lied and are actually based in China.
So, when you buy a DJI drone or Roborock vacuum you get no warranty cuz it's a Chinese company? Make it make sense.

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Apr 03, 2026 03:30 PM
1,216 Posts
Joined Apr 2015
TPMJBApr 03, 2026 03:30 PM
1,216 Posts
Quote from Marceille :
Very high but doesn't sound horrific with those actual water content results. Our town provides those water testing results each year that are done by a 3rd party company, but they don't test for pfas or meds, which RO is going to help remove most of. I put mine through the fridge too, a no brainer, as much ice and dispensing as we use (and basically never need to change fridge filter), but I did have to keep the pressure up or it wouldn't work properly. I definitely like this convenient cartridge system here, but not sure how the cost compares, as 5-stage 3-year replacement kits are about $125.
Yeah different cities have different levels of testing. Some cities around here do the bare minimum while others have more robust testing. My test also included PFAS and Fluoride, so that was nice. We don't put fluoride in the water here, but there's naturally some.

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