Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

Ostafari

Mar 28, 2026 1:02 AM

142 Comments

Joined Apr 2020

OstafariMar 28, 2026 1:02 AM

142 Comments

I have the larger 700gph unit with alkaline ($300). Has been an excellent alternative to our previous 7 stage w/tank RO system. Much less waste, more under sink room and minimal operating noise. Easy install as well especially if your counter hole is already drilled.

jalmar

Mar 28, 2026 1:18 AM

155 Comments

Joined Oct 2009

jalmarMar 28, 2026 1:18 AM

155 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.

in the waterdrop G2 specification , it says 2:1

jalmar

Mar 28, 2026 1:20 AM

155 Comments

Joined Oct 2009

jalmarMar 28, 2026 1:20 AM

155 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.

in the waterdrop website for G2 specification , it says 2:1

Samwise Gamgee

Mar 28, 2026 4:03 AM

4.9K Comments

Joined Jan 2004

Samwise GamgeeMar 28, 2026 4:03 AM

4.9K Comments

Quote from Punker1234

:

TDS creep is when you first turn it on after it sitting for a little bit, the water will have absorbed some contents back and the TDS number rises. Ie, i think clean RO water is 0-25 TDS or PPM. So for instance, my local water supply is 1000-1300 (very high, Southern California) and it takes about 30 seconds for the unit to get to 20 TDS. This time will vary based on how dirty your tap water is. If you look up your water supplier, they usually post this data online somewhere.

Is there a meter or sensor that tell when tds creep has lowered? Regular tap I'm told to leave running for 10sec, before use/drinking. Guessing it's same idea?

Punker1234

Mar 28, 2026 4:07 AM

414 Comments

Joined Sep 2007

Punker1234Mar 28, 2026 4:07 AM

414 Comments

Quote from Samwise Gamgee

:

Is there a meter or sensor that tell when tds creep has lowered? Regular tap I'm told to leave running for 10sec, before use/drinking. Guessing it's same idea?

On this unit, no. You'll often see units with a meter built into the water dispenser. Honestly, if you have decent water in your area, 10 seconds. If you have really bad like mine, 30 seconds is more than enough.

Jenn.h

Mar 28, 2026 4:25 AM

279 Comments

Joined Feb 2013

Jenn.hMar 28, 2026 4:25 AM

279 Comments

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.

I had the same issue. I solved it by splitting the power and added a remote controller to the disposal. The filter gets constantly plugged. It works fine so far.

Jenn.h

Mar 28, 2026 4:33 AM

279 Comments

Joined Feb 2013

Jenn.hMar 28, 2026 4:33 AM

279 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?

You don't have to. A solution is to replace your faucet with something like this: https://a.co/d/0h6sRlrp there are many similar products in the market. The spray on this one is way too firm but it works

Last edited by Jenn.h March 27, 2026 at 09:36 PM.

ddBqRvCpcFv6

Mar 28, 2026 10:37 AM

1.6K Comments

Joined Aug 2009

ddBqRvCpcFv6Mar 28, 2026 10:37 AM

1.6K Comments

Quote from Jenn.h

:

I had the same issue. I solved it by splitting the power and added a remote controller to the disposal. The filter gets constantly plugged. It works fine so far.

https://www.amazon.com/DEWENWILS-...9hdGY&th=1

marcski1

Mar 28, 2026 2:46 PM

435 Comments

Joined Jul 2012

marcski1Mar 28, 2026 2:46 PM

435 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?

Diamond hole saw bit, there is no pilot so you start on one side til it bites, the rotate around slowly until you have enough to guide the bit down straight. If you go slow and let the bit do the work, this has worked every time for me. You could also use a bit of water trickled while drilling for cooling and to control dust as you go. Local home stores should carry the diamond encrusted bit in small sizes

LLLosingit

Mar 28, 2026 3:15 PM

293 Comments

Joined Feb 2010

LLLosingitMar 28, 2026 3:15 PM

293 Comments

These are not cost effective, the replacement filters are almost as much as a new unit, although some people will have the filters last a couple years most will not.

2

1

cire808

Mar 28, 2026 3:49 PM

2 Comments

Joined Nov 2016

cire808Mar 28, 2026 3:49 PM

2 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)

Pure to drain
1 gallon pure to 1 gallon drain

The 2:1 on the G5P500 is more efficient and officially certified to both NSF/ANSI 58 & 372, while the G2 is "tested to" NSF/ANSI 58 standards. They are not officially certified.

joebells

Mar 28, 2026 4:32 PM

788 Comments

Joined Feb 2019

joebellsMar 28, 2026 4:32 PM

788 Comments

Can you add a remineralizer? I had an APEC setup at the exs that was a number of different stages, then it went to RO, then it went to two more things the last one adding minerals back to the water.

joebells

Mar 28, 2026 4:34 PM

788 Comments

Joined Feb 2019

joebellsMar 28, 2026 4:34 PM

788 Comments

Quote from Cheesecycle

:

Curious how else you would expect to power it?

I am used to an APEC system that requires no power. What does this use electricity for?

Cheesecycle

Mar 28, 2026 4:52 PM

592 Comments

Joined Jan 2008

CheesecycleMar 28, 2026 4:52 PM

592 Comments

Quote from joebells

:

I am used to an APEC system that requires no power. What does this use electricity for?

There's a pump that facilitates a higher flow rate than traditional systems.

drjd888

Mar 28, 2026 5:59 PM

112 Comments

Joined Nov 2010

drjd888Mar 28, 2026 5:59 PM

112 Comments

Ended up ordering the G3P600 for $399 instead for the increased efficiency (2:1 vs 1:1), better filtration (more certifications), faster flow and built in digital TDS meter. The coupon code for the G2P400 didn't work for the G3P600.

Waterdrop G2 7 Stage 400 GPD Reverse Osmosis Water Filter System

$187

$300

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