Is the reverse osmosis system worth it?

The Reverse Osmosis water filter can remove contaminants down to 0.0001 micron. This Reverse Osmosis water filter system removes up to 99% of over 1,000 contaminants, including vinyl chloride, chlorine, fluoride, lead (removes up to 98%), arsenic, asbestos, calcium, sodium and more. According to the Centers for Disease Control and Prevention (CDC), Reverse Osmosis water systems have very high effectiveness in removing common chemical contaminants, virus (for example, Enteric, Hepatitis A, Norovirus, Rotavirus).

How does Reverse Osmosis work?

Reverse Osmosis is a process that reverses the water flow so that water can go from concentrated solution to the dilute solution by passing through a semi-permeable membrane. A Reverse Osmosis membrane has a pore size of approximately 0.0001 micron, which will remove up to 99% of the contaminants, including lead (removes up to 98%), fluoride, arsenic, asbestos, calcium, sodium, and more.

How is reverse osmosis different from filtration?

Filtration is a process in which particles from the water like dirt and sediment adhere to the surface or pores of the absorbent medium, typically polyester, polypropylene, Active Carbon, etc. But it cannot remove other contaminants like Total Dissolved Solids (TDS), including calcium, magnesium, potassium and sodium, and others. The microfiltration filter has a pore size range from 0.05 to 5 microns. Reverse Osmosis is a water treatment process that reverses the flow of water by using pressure to push water through a partially permeable membrane to separate water molecules and unwanted contaminants. The Reverse Osmosis membrane typically has the pore size of approximately 0.0001 microns.

How difficult is the installation? Can I install this RO system by myself or do I need a plumber?

Yes, you just need a little basic plumbing knowledge. The RO water system is designed for do-it-yourself installation, and all necessary parts for installation are included. It also comes with a clear, well-organized written instructions, instructional videos on YouTube. 1 year limited manufacturer warranty on new water filtration systems, plus lifetime technical support.

How often do I replace reverse osmosis filters?

For this Reverse Osmosis water filtration system RCC7, it is recommended to replace:

FP15 Sediment Filter: every 6-12 months
FG15 Granular Activated Carbon Filter: every 6-12 months
FC15 Carbon Block Filter: every 6-12 months
FT15 Post-Carbon Filter: every 6-12 months
MC7 RO Membrane: every 2-3 years

You can also find the replacement fitler set here:
6 months replacement filter set
1 year replacement filter set
2 year replacement filter set
3 year replacement filter set

How much does a residential RO water filter cost?

The Reverse Osmosis systems usually cost $180 - $500, depending on how many stages you need and how much water your household will consume per day. If you have any questions, please do not hesitate to contact us at (678) 261-7611 M-F 9-5 EST or open a ticket here. 24/7.

Does this RCC7 filter out fluoride?

Yes, the under-sink RO filtration system RCC7 can reduce fluoride up to 99%.

How much water is wasted per gallon to filter the water?

The filtered water to waste water ratio (w/tank) is 1:3. If you like less waste water, you can purchase reverse osmosis filter system with pump RCC7P or our next generation tankless Reverse Osmosis system RO500

Is the RO filter system NSF Certified?

Yes, the under sink Reverse Osmosis RCC7 is certified to NSF/ANSI 58 for TDS reduction (58 for reverse osmosis).

What kind of contaminant can the RO water filter system remove?

This under-sink-mounted water filter removes up to 99% of over 1,000 contaminants, including lead (removes up to 98% of lead), chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more.

Do I have to put this Reverse Osmosis drinking water system under the sink?

No, this RO water purifier can be installed anywhere you want, like the basement, as long as you can tap into your water line. The default length of the 1/4'' tubing is 5 feet. If you need longer tubing, please do not hesitate to contact us at (678) 261-7611 M-F 9-5 EST or open a ticket here. 24/7.

I bought this 5-stage Reverse Osmosis filtration system, and I want to add one alkaline filter, where can I find the box that can hold the alkaline filter to connect?

You will need to buy ACL1 and FA15 (the alkaline filter). If you have any questions, please do not hesitate to contact us at (678) 261-7611 M-F 9-5 EST or open a ticket here. 24/7.

Can the reverse osmosis water purifier be installed on a hard water line? The plumber says he would need to run a soft water line to the sink.

As long as it is a cold water line only that is 3/8\" or 1/2\" that has a TDS of under 2,000 ppm, it will be okay.

Does it come with two different sizes of cold water adapters or T adapters? The 1/2 inch feed water adapter doesn't fit my 3/4 inch connectors.

We now supply a convertible feed water adapter that can be for 3/8\" and 1/2\".

Does the 3.2 gallon storage tank need to be pressurized?

No, the tank will be pressurized by this system since there is a blatter built-in. And it is pressurized at around 7-10 psi. Therefore, you don't need to pressurize it on your own.

I need the modern chrome faucet instead of the brushed nickel, is that a possibility?

Yes, it is possible. Just contact us at (678) 261-7611 M-F 9-5 EST or open a ticket here. 24/7, so that we can swap the faucets for you.

Does this Reverse Osmosis machine filter out iron?

Yes. This Reverse Osmosis water filter under sink removes up to 98% of iron & lead and up to 99% of over 1,000 contaminants, including chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more.

How to test if the water pressure is within the system allowance range?

This Reverse Osmosis drinking water system requires a minimum pressure of 45 psi and a maximum of 70 psi to work. You can get your water tested at the main supply by a professional company or simply use a water pressure gauge.

Can I connect multiple tanks to one under sink Reverse Osmosis system?

Yes, you can add a second tank to go with this unit. Please make sure that both tanks you are using start out with the same pressure. For more details please contact us at (678)261-7611 or open a ticket here.

What gauge / size are the water lines used for this RO filtration system?

All of the tubings for this under sink RO are 1/4\".

Why do my ice cubes come out clear on just the outside?

The reverse osmosis unit sometimes will introduce some air into the system, which will make the ice cubes unclear. But you don't have to worry about it. If you have any more questions, please contact us at (678)261-7611 or open a ticket here.

Does this Reverse Osmosis water purification system come with the installation kit?

Yes, this residential Reverse Osmosis system comes with most of the tools needed to install under your sink. It includes RO machine head, RO membrane, 3 pre-filter housings and cartridges, storage tank, RO faucet with installation kit, feed water adapter, 4-color tubing set, drain saddle 1/4'', tank valve, housing wrenches, leak stop valve, spare O-rings, and fittings. Some very common toolset is not included, such as scissors, adjustable wrench, screwdriver, and speed drill (for drilling a hole on the countertop for drinking faucet).

Does this under sink Reverse Osmosis filter require any power?

No. This Reverse Osmosis system for the kitchen sink does not need any power to operate. However, if you have the water pressure lower than 45 psi, we recommend installing a pump that will need power.

Will this RO purifier remove radon from our water?

Yes, the GAC filter will take the radon out of the water.

Does boiling water reduce TDS?

Boiling water doesn't reduce the TDS in your tap water. A Reverse Osmosis water purification unit such as RCC7 can reduce the TDS to a very low level. You may also want to check our next generation tankless RO system with lower wastewater ratio here: RO500

What is the TDS standard of bottled water?

Bottled water must contain at least 250 mg/l TDS to be labeled as mineral water in the US.

Is there a difference between this iSpring brand and other brands? Why is the price gap so dramatic?

Since 2005, iSpring has brought an average Reverse Osmosis price under sink filter systems down from the $700 range. We bypass middlemen, sell directly online, cut advertising and live up with customer reviews by continuous improvements. We are doing what we want to do: make clean water available and affordable to more people. We believe in long-term value.