Are these refurbished RO systems reliable?
Yes, we only
sell machines that have undergone
rigorous quality and sanitation checks, and repackaging processes to ensure they function as new.
Additionally, all filter elements have been replaced with new ones, giving you the peace of mind to use
them with confidence.
Will I receive a warranty with my refurbished G3
Yes, we provide
a 1-year warranty with each
refurbished RO system that we sell, giving customers peace of mind and protection against any unforeseen
How do I ensure that my refurbished RO system
regular maintenance and cleaning of
your used or refurbished RO machine to ensure optimal performance. We also provide support and guidance
on maintaining your machine, including filter changes and routine checks.
Will I need to replace the filter elements on a
pre-owned RO system?
No, you will
not need to replace the filter elements
as all filter elements have already been replaced with new ones during our thorough cleaning and
servicing process. You can use the RO system with confidence, knowing that it has been refurbished to
meet our high standards and is ready for use. If you have any further questions or concerns, our team is
always available to provide support and guidance.
What is the difference between Waterdrop and traditional RO systems?
||Waterdrop RO system
||Traditional RO system
|Smart leakage protector
|3s filter change time
||1 : 1
||1 : 3
|Real-time Water Quality Display
What is reverse osmosis water systems?
Reverse osmosis (RO) is a water purification process that uses a partially
permeable membrane to filter out impurities from drinking water. In reverse osmosis, an applied pressure
is used to overcome osmotic pressure, a colligative property that is driven by chemical potential
differences of the solvent, a thermodynamic parameter. The result is that the solute is retained on the
pressurized side of the membrane and the pure water is allowed to pass to the other side. To be
"selective", this membrane should not allow large molecules or ions through the pores, but should allow
filtered clean water to pass freely.
How does a reverse osmosis system work?
A reverse osmosis system reduces sediment and chlorine from water with a
prefilter before it forces water through a semipermeable membrane to reduce dissolved solids. After
water exits the RO membrane, it passes through a postfilter to filter the drinking water before it
enters a faucet.
Does the reverse osmosis water filtration system produce wastewater?
All RO systems will produce concentrated water to discharge impurities.
Compared to traditional RO water purifiers, Waterdrop RO system produces less concentrated water and
saves 300% more water. You can collect concentrated water to mop the floor, wash your car, do laundry,
What harmful substances can Waterdrop reverse osmosis water filter system remove?
Waterdrop reverse osmosis water filter system adopts advanced composite
filter technology. Uses the characteristics of various filter materials skillfully and combines them to
achieve better filtration. The composite filter can intercept most harmful substances.
• TDS, chlorine, taste and odor.
• Harmful substances: chromium (hexavalent), chromium, ferric oxide.
• Heavy metals: lead, mercury, barium, copper, radium 226/228, aluminum.
• Microorganic harmful substances
• Inorganic harmful substances: arsenic and inorganic arsenic compounds,
• Organic harmful substances
Does Waterdrop reverse osmosis water filter system need power?
The RO system has a pump that will need power to maintain a fast water
How to install reverse osmosis system?
Waterdrop RO systems are designed for DIY installation. You can install
the system in 30 minutes. Simply refer to the instruction manual and instructional videos, or contact us
by email, phone, or live chat.
This video explains how to install Waterdrop RO system
How often do I need to change the RO filter?
G3: The CF filter has a 6-month lifetime; the CB filter has a 1-year
lifetime; the RO filter has a 2-year lifetime. Waterdrop G3 Reverse Osmosis System has a smart faucet
and filter life indicators that will remind you to replace the filter.
Does the reverse osmosis system make a loud sound?
The sound will not exceed 65 dB, which is a comfortable level for everyday
life (65 dB is tested under standard laboratory conditions, where the feed water pressure is between
14.5 psi and 87 psi). A loud sound may be caused by the following:
a. The system is not positioned in a flat area. Make sure the system is
placed smoothly without shaking.
b. The system is placed against the cabinet. Do not place the system
against the cabinet. The system may vibrate when it works.
c. The water pressure is unstable. Check and confirm the water pressure is
between 14.5 psi and 87 psi. The sound will decrease when the water pressure becomes stable.
When you change filters, do you need to turn the water off?
The water source and power supply are not required to be cut off when the
filters need to be replaced. The replacements can be directly screwed and reinstalled. RO system can be
normally used after resetting and the flushing process are finished.
Does the RO system remove coliform and other parasites?
Our RO system uses reverse osmosis filtration technology with a filtration
accuracy of 0.0001um, and the system can effectively reduce most harmful substances, including coliform
and other parasites.
Does this RO water system remove arsenic?
As a benefit of the RO membrane (filtration accuracy: 0.0001μm), this
product is able to reduce the arsenic efficiently from the source water. The membrane has microscopic
pores that are specially sized to allow water molecules through, while trapping larger inorganic
molecules like lead, iron, chromium and arsenic.
Is this reverse osmosis water filter system unit suitable for well water?
We do not recommend using well water as source for our RO systems.
reasons are as follows:
1. Large particles.
Compared to municipal tap water, the well water is
rich of large particles, which will clog the filters easily, and shorten their lifetime
significantly.Please note that the filters will still need to be replaced more frequently, even if you
have added a pre-filtration system.
The well water has very complicated compostion,
and some of them (apart from the large particles) can cause the filter or internal valve to be clogged
and prevent the RO system from normal performance.
3. Water pressure
The well water may not
provide the feed water pressure that the RO system requires (14.5 psi min.). Furthermore, the water
pressure will be even lower after passing through pre-filtration systems.
Do you need to have an electrical outlet under your sink for this work?
As a standard appliance, this product will need to be plugged into one
electrical outlet to function normally.
Does this RO system need a drain piping nearby for discharge?
Yes, this model does need a drainpipe nearby, for discharging the waste
water. For that, we provide an adjustable drain saddle to connect the RO's waste water tubing to your
What is the amount of space required between the RO unit and the cabinet?
In order to avoid the vibration which can affect the use experience,
please ensure that there is an about 1-inch gap between the RO system and the cabinet. The size of the
RO Filtration system is 18.11 "* 5.67" * 17.72 ", without a storage tank. It's very thin and takes up
very little space.
Has this RO water system been NSF certified yet?
Yes, our RO system has been tested and certified by NSF International.
Here is the link for your reference.
Is the water line hose 1/4" or 3/8"?
Inlet tubing: 3/8", Outlet tubing (connect with RO faucet): 1/4", Feed
water adapter: compatible with 3/8" and 1/2" water line.
Can I buy the accessory kit so that I can hook up my fridge all at once?
Yes, the instruction manual explains how to connect the Waterdrop to your
fridge using parts purchased from a hardware store. The output from the Waterdrop to the faucet is 1/4”
tubing. If your fridge has a 1/4” input, all you need is a 1/4” quick-connect T-adapter and the tubing
that you’ll run to your refrigerator - you can find these online or at your local hardware store. If
your refrigerator is like mine, the input is 3/8”, so I had to add an additional 1/4” to 3/8” adapter to
the line leading from the T-adapter to the fridge. It doesn’t affect the performance of the Waterdrop at
Is this reverse osmosis water system BPA free?
Please note that our RO system is BPA free.
Does this reduce or remove the salt in the water from my water softener?
Although with filtration accuracy of 0.0001 μm, this model can reduce
Calcium ion 90% of the salt from the water, the remaining salt added by the water softener may still
affect the water taste. Therefore, we don't recommend placing the RO system after a salt-based water
softener, since the taste will be affected.
What is the minimum water pressure to operate this unit?
The rated water inlet pressure of the machine is 14.5-87psi. It can work
properly within this range.
What size hole would I need to drill to install the faucet in my sink?
It's recommended to drill a hole of 1". If there's a reserved hole for the
soap dispenser on your countertop, you could use that to install the RO faucet directly. In addition, we
have included a sticker in the package, which could be used as a reference while drilling the hole.
How often do you need to replace the reverse osmosis filters?
The life of the filter element of our machine depends on the two indexes
of service time and pure water after filtration. As long as one of them reaches the upper limit, it
needs to be replaced. The first stage front compound filter element is recommended to last for 6 months
or to filter 550 gallons of pure water. The second stage RO element is recommended to last 24 months or
to filter 2200 gallons of pure water. The third stage rear carbon rod filter is recommended to last 12
months or to filter 1,100 gallons of pure water. Due to the different water quality and water
consumption of each house, the actual replacement time of the filter element is not consistent. The
actual use situation shall prevail. When the filter element needs to be replaced, the prompt light on
the machine and the lamp ring of the faucet will prompt through the color change. You can replace it
according to the prompt, which is very convenient.
Can the system be connected with a UV water sterilizer?
Yes, it can be connected with a UV water sterilizer, and it requires an
extra power plug (the UV water sterilizer requires extra power).
How often do you have to change the membrane?
The RO membrane filter needs to be changed every 24 months or 2200
Can the system be connected to the refrigerator so the ice is filter as well?
Generally speaking, the RO system can be connected to your refrigerator.
After completing the registration online, you could choose the accessory kit, which will help you
connect the RO to your refrigerator/ice maker. Since different refrigerator/ice maker has various
requirement of water pressure, it's not possible for our RO system to provide them all. Connection under
mismatched circumstance may result in many problems, including but not limited to: slow ice making,
frequent start-stop issue, etc. Therefore, it's NOT recommended to connect the RO system to your
Does this reverse osmosis water system prevent harmful substances from growing in the filter?
Please rest assured that the RO membrane (filtration accuracy 0.0001 μm)
can effectively reduce impurities whose diameter is greater than 0.0001 μm from the source water.
What is the waste water to filtered water ratio?
The waste to filtered water ratio is 1:1, which is much higher than the
traditional RO systems.
Can I use our own faucet？
Truly sorry, the brushed nickel faucet is the only option available
You could use your own RO faucet with our product, but not normal faucet for tap water.
There are a few things you may need to know before purchasing one:
Firstly, our faucet is equipped
with a filter life indicator, which allows you to monitor the filters' life easily. If you decide not to
use our original faucet, this function will not be in effect.
Secondly, your RO faucet should be
able to connect with the outlet tubing of the system, which has a diameter of 1/4".
In addition, it
should have a "Quick-Connect Fitting", please click here
OR, it should come with a set of accessory parts, which allows you to connect the faucet with the bare
end of our outlet tubing. Please click here to see the
example for your reference.
If the faucet does not meet one of these requirements, you will
need to acquire a corresponding adapter, in order to complete the connection with the machine.
What does Pure to Drain Rate mean?
The reverse osmosis water filter relies on a semi-permeable membrane
to filter out impurities from drinking water. When the tap water is compressed through the RO
membrane, it produced pure water and waste water. The ratio of pure water to waste water is called
wastewater ratio. 1:1 wastewater ratio means 1 gallon water is wasted per 1 gallon purified, and 2:1
wastewater ratio means 1 gallon water is wasted per 2 gallon purified. The higher the wastewater
ratio is, the less waster water produced during the filtration process. During the use of RO water
filter, the actual ratio might be lower than the labeled, depending on many factors such as water
quality, pH, pressure and temperature.