Reverse Osmosis

You Deserve The Best

US Water Systems is your one stop shop for all things related to reverse osmosis . We carry reverse osmosis systems, ro replacement filters, ro membranes, ro installation parts, ro accessories, and designer faucets for under sink reverse osmosis systems. We provide the largest selection of RO systems that use NSF Certified Components, and every system is backed by the best warranties in the industry. If you are not sure which system is best for you, one of our water specialists will be glad to assist you in choosing one. Call us at 800-608-USWA, e-mail us at, or use the live chat tool.

Our Guarantee

At US Water Systems we stand behind every product we sell. We are so confident you will love our reverse osmosis systems that we offer a 30 day money-back guarantee (ask for details).

What is Reverse Osmosis?

Reverse Osmosis

Reverse Osmosis removes the widest spectrum of contaminants of any water treatment process. Water is forced through semi-permeable membrane leaving the dissolved particles in the more highly concentrated solution.

Reverse osmosis is a filtration method that passes water through a filter membrane that has pores that are so small, only pure water is able to get through. Other contaminates are physically too large to pass through the membrane, so they do not enter the water supply.

Effective for PFOA / PFAS and thousands of others contaminants

Amoebic Cysts99.00%Nickel95.00%
Cryptosporidium Cysts97.00%Strontium97.00%
Giardia Lamblia Cysts99.00%Trihalomethane98.00%
Lead97.00%Volatile Organics95.00%
Magnesium97.00%Z, 4-D95.00%

A Commitment To Transparency

As a general rule we suggest that our customers purchase one of our water tests before buying a system. The test is sent off to an independent 3rd party laboratory for testing. This allows us to provide independent and unbiased facts to our customers regarding the underlying cause of their current water issues. More importantly, it allows us to provide different solutions to the water issues that our customers face. Even better, if you choose to go with one of our recommended systems, the water test acts as a $100 credit towards the purchase price.