Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

scottj2

Mar 27, 2026 3:16 PM

27 Comments

Joined Sep 2013

scottj2Mar 27, 2026 3:16 PM

27 Comments

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Just to note, some of these Waterdrop units have an automatic flushing feature where they will flush 1l of water 5-10 mins after every use, even if you only pour a single glass of water. I couldn't find anything on this particular unit, but it's something to be aware of.

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OliveNose252

Mar 27, 2026 3:34 PM

8 Comments

Joined Sep 2019

OliveNose252Mar 27, 2026 3:34 PM

8 Comments

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?

It requires a contractor that does that specifically. Not worth the risk of cracking your counter.

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NavyWallaby409

Mar 27, 2026 4:29 PM

78 Comments

Joined Feb 2021

NavyWallaby409Mar 27, 2026 4:29 PM

78 Comments

Quote from OliveNose252

:

It requires a contractor that does that specifically. Not worth the risk of cracking your counter.

Do you think a plumber could do this?

1

NavyWallaby409

Mar 27, 2026 4:30 PM

78 Comments

Joined Feb 2021

NavyWallaby409Mar 27, 2026 4:30 PM

78 Comments

Quote from dewdrops6

:

bought G5P500 instead of this !! I already have 7 stage ispring system, replacing with this.

Any reason you're going with the G5P500 instead of this?

dangitzken

Mar 27, 2026 5:00 PM

95 Comments

Joined Jun 2012

dangitzkenMar 27, 2026 5:00 PM

95 Comments

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.

Thanks. Tempted to switch from my apec RO-90 to this. Any reasons not to switch?

2

dewdrops6

Mar 27, 2026 5:35 PM

277 Comments

Joined Jul 2009

dewdrops6Mar 27, 2026 5:35 PM

277 Comments

Quote from NavyWallaby409

:

Any reason you're going with the G5P500 instead of this?

filtering performance is bit better , if its the same price why not.

baraclude

Mar 27, 2026 6:00 PM

1.6K Comments

Joined Nov 2009

baracludeMar 27, 2026 6:00 PM

1.6K Comments

Quote from dangitzken

:

Thanks. Tempted to switch from my apec RO-90 to this. Any reasons not to switch?

I had APEC for a few months. Didn't fit my use. The tank only holds maybe 2-3 gallons of water. And it takes a over an hour to fill up the entire tank. Its advertised clean to dirty water ratio is way off. More like 1:6. Swapped it out for waterdrop tankless. Instant water, never had to wait, and way less water wasted. The only downside is that their filters are expensive. And the ratio performance dropped from 2:1 to 1:1 after swapping out the old filter. I have the G2P600.

Last edited by baraclude March 27, 2026 at 11:04 AM.

dangitzken

Mar 27, 2026 6:14 PM

95 Comments

Joined Jun 2012

dangitzkenMar 27, 2026 6:14 PM

95 Comments

Quote from baraclude

:

I had APEC for a few months. Didn't fit my use. The tank only holds maybe 2-3 gallons of water. And it takes a over an hour to fill up the entire tank. Its advertised clean to dirty water ratio is way off. More like 1:6. Swapped it out for waterdrop tankless. Instant water, never had to wait, and way less water wasted. The only downside is that their filters are expensive. And the ratio performance dropped from 2:1 to 1:1 after swapping out the old filter. I have the G2P600.

Thanks. I've only had my Apec for a year, so far so good for my family usage honestly. The only downside is it takes up a lot of space and I'm always scared of leaks. More connection points means higher chances of leaks compared to the Waterdrop.

Lovnlife16

Mar 27, 2026 6:53 PM

12 Comments

Joined Oct 2021

Lovnlife16Mar 27, 2026 6:53 PM

12 Comments

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 have you had it, and how many in the household? Just one here though water plants and 3 pets.

Punker1234

Mar 27, 2026 7:48 PM

414 Comments

Joined Sep 2007

Punker1234Mar 27, 2026 7:48 PM

414 Comments

Quote from Covenants

:

I was planning to replace the first filter after 12 months but the filter light has not gone off and it's been 15 months already... Do you think it's safe to wait until the light indicator or should I just replace it? How reliable is the filter indicator for these?

Those lights are pure estimates. It's design to get you to buy filters. It's how they make money. Either put an inline tds meter in so you can occasionally check the unit or get a handheld one. Totally worth it.

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Audell

Mar 27, 2026 8:35 PM

147 Comments

Joined Mar 2006

AudellMar 27, 2026 8:35 PM

147 Comments

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.

I have apec and the water comes out very slow. I replaced the tank and it works normally.

CTRL-ALT-DEALS

Mar 27, 2026 9:02 PM

7.6K Comments

Joined Sep 2014

CTRL-ALT-DEALSMar 27, 2026 9:02 PM

7.6K Comments

Quote from dangitzken

:

Thanks. Tempted to switch from my apec RO-90 to this. Any reasons not to switch?

If space isn't an issue and you don't care about drain ratio, the Apec flows faster, so I would keep it.

Personally, when my G2 filters are exhausted, I will upgrade to this one for $50 more than the cost of replacement filters:

https://a.co/d/04UmA51E

800 GPD, 3:1 drain ratio, and Standard 58 certified for $200.

CTRL-ALT-DEALS

Mar 27, 2026 9:09 PM

7.6K Comments

Joined Sep 2014

CTRL-ALT-DEALSMar 27, 2026 9:09 PM

7.6K Comments

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)

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

Last edited by MostBased March 27, 2026 at 02:15 PM.

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Rabbitsuit

Mar 27, 2026 9:56 PM

239 Comments

Joined Aug 2015

RabbitsuitMar 27, 2026 9:56 PM

239 Comments

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.

Reading some of the reviews it doesn't appear to be and the folks that called it out got a partial refund.

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ddBqRvCpcFv6

Mar 27, 2026 10:59 PM

1.6K Comments

Joined Aug 2009

ddBqRvCpcFv6Mar 27, 2026 10:59 PM

1.6K Comments

I have Waterdrop G2 water filter which is older version of the this unit

1. I got $10 TDS water meter. My area tap water is 250 TDS. Filtered water is 10 TDS.

2. I installed remineralization filter to add mineral and better taste. RO water can taste... sharp and dry.

3. filter cost is not high at all one is CF carbon filter Every year and other one is RO filer every two years.

4. You would need a power outlet to use this machine. MY Apartment only has one outlet.. so I used bluetooth remote switch to control power to Garbage disposal and this water machine is constant on.

5. Never had a issue, leak, problem in 3 years

6. You would need to drill a hole in the sink. this was most pain in the ass process.

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Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

$187

$300

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