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Improve Your Drinking Water with Our Under-Sink Reverse Osmosis
Water Filters

Ready for Installation in Your San Diego Home

Best Under-Sink Water Filter System in San Diego, CA

Your home's drinking water can be the best in the world. All it takes is a professionally installed under-sink drinking water system to guarantee that you have perfect drinking water.

San Diego Pure Water is San Diego’s leader in advanced water treatment technology. We offer premier drinking water systems to meet your precise needs and exceed your expectations. The patented multi-stage reverse osmosis and carbon block technology we employ to manufacture these under-sink systems is guaranteed to remove chlorine, chloramines, fluoride, and arsenic. Our 10-year warranty and excellent customer service ensure you buy a system that will provide you with clean and safe water for years to come.

Water Systems That Make A Difference

San Diego Pure Water’s systems are tested & verified for the maximum chloramines, chlorine, fluoride, iron, copper, manganese, radioactive isotopes, and arsenic removal. Our three choices of systems filter water through 6, 7, or 8 filtered stages to ensure maximum water quality. The systems were designed and manufactured locally in Southern California. Each system includes a custom faucet that our professionals will install with an automatic leak detection system to prevent damage.

The “Perfect Water 506”

Fifty gallons of the freshest water are brought daily to your tap.

6 Filtered Stages

  • Sediment filter
  • GAC filter for chlorine
  • Catalytic carbon filter for chloramines
  • Reverse osmosis membrane
  • Calcium magnesium filter
  • Carbon polishing filter

The “Perfect Water 507”

Seventy-five gallons of ultra-pure water flow daily for your home.

7 Filtered Stages

  • Sediment filter
  • GAC filter for chlorine
  • Catalytic carbon filter for chloramines
  • Reverse osmosis membrane
  • Permeate pump
  • Calcium magnesium filter
  • Carbon polishing filter

The “Perfect Water 508”

Seventy-five gallons of the highest quality water per day for your family.

8 Filtered Stages

  • Sediment filter
  • GAC filter for chlorine
  • Catalytic carbon filter for chloramines
  • Reverse osmosis membrane
  • Deionization filter to reduce total dissolved solids
  • Calcium magnesium filter
  • Carbon polishing filter


Contact San Diego Pure Water for Your New Under Sink Water Filtration System Today

For over 30 years, San Diego Pure Water has been dedicated to serving the San Diego community with top-notch water purification and filtration systems. We provide expert filter replacement, filter cartridges, flow rate, and water line services.

Our systems efficiently remove contaminants such as heavy metals, ensuring clean water without bad a taste or odor. Your home's dedicated faucet can have an extended filter life, giving you a healthy lifestyle right from your home tap. Contact us today in San Diego or nearby areas, and let us assist you in installing a system tailored to your needs!

A girl holding a glass of water


How Do Contaminants Get Into My Water?
Contamination can occur from various sources, such as naturally occurring chemicals and minerals entering the water stream, manufacturing processes, or local land practices such as farmers using fertilizers.
How Long Do Filters Last?
On average, under-sink reverse osmosis system filters last between two to five years, depending on the amount used.
Why Are Under-Sink Reverse Osmosis (RO) Systems So Popular?
Reverse osmosis systems have grown in popularity over recent years. RO produces great-tasting and pure water efficiently while being cost-effective for your home.
How to Change (Or Replace) Under Sink Water Filter?
To change or replace your under-sink water filter, first, turn off the water supply. Release any remaining pressure by opening the faucet. Remove the filter housing the old filter. Clean the housing with mild soap and water. Install the new filter and reassemble the system. Turn on the water supply and flush the filter for a few minutes. If you're concerned about damaging your filter during this process, contact our team for help.
How to Clean Under Sink Water Filter?
Cleaning your filter is a similar process to changing your filter. To clean an under-sink water filter, first, turn off the water supply. Then release pressure by opening the faucet and remove the filter housing and filter. Make sure to clean the housing with mild soap and water. Finally, rinse the filter under cold water. When you reassemble the system, you'll need to turn on the water supply and flush the filter for a few minutes before using it.
What Is the Best Water Filter System Under Sink?
Determining the best under-sink water filter depends on your specific needs. Consider factors like filtration technology, contaminant removal capabilities, and the filter's lifespan. Popular options include reverse osmosis filters, carbon block filters, and sediment filters. Our team can also help walk you through the options. Contact us to learn what filter is best for your specific situation.
How Much Does an Under Sink Water Filter System Cost to Install?
The cost to install an under-sink water filter system varies. It depends on factors like the type of filter, difficulty of installation, and labor costs in your area. When you contact us for service, we can walk you through an accurate estimate of installation for your specific situation.

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See Why Our Customers Love Us
- Keith DeCarlo's Rating
Couldn't be happier! First off, the products are top of the line, excellent quality. But what really sets San Diego Pure Water apart from the competition is the customer service. From to technicians to the owners, they are all there to make sure everything is, not only working properly, but also working to the customer's expectations. I actively recommend them to others and have actually gotten compliments about how good my water tastes which is something I never expected. Thank you San Diego Pure Water! - Keith DeCarlo
- Jonathan Beck's Rating
Bob is very smart and knows alot about the science behind water and the chemicals found in them. Compared to some companies that will just try to sell you an over priced system. He actually breaks down the science of how it works, why you need specific pieces, and the history behind San Diego water. I have heard sell pitches before and used some of my own. Pure water is not a sales pitch but will actually get you what you need at a REASONABLE PRICE. Read More… - Jonathan Beck
- Lynnie D's Rating
The owner Trish is one of my heroes. She not only agreed to install a water filtration for my mothers apartment unit, but she gave us an excellent price and agreed to install it the next day to accommodate my work schedule. They didn't mind that the parking was bad in our neighborhood nor did they mind my mother does not speak English. I am very grateful for her business. Initially I had asked another water treatment company who initially agreed to do the work and told me to get the landlord authorization. - Lynnie D
- Janice M.'s Rating
My first contact was with Bob. He responded very quickly. Quoted me a price way lower than my current water company. Then Joe came to install. Very nice and efficient! Would definitely recommend!!! - Janice M.
- Elijah B.'s Rating
Trish, the receptionist worked to get my install date moved to the left due to my work schedule. Neil the sales rep was very knowledgeable and did not upsale me based on square footage. Martin the installer was professional and expedient. All in all the service was impeccable!! If you are in the market for a home filtration system, this company is top notched. And the system works great!! - Elijah B.
- Antonio Z.'s Rating
San Diego Pure Water is awesome to work with. Bob is so knowledgeable about water filtration that I was blown away. They offer everything available so we could choose what we ready wanted instead of being forced to choose from the limited options that other filter companies offered. Everyone was professional and great to work with. I’ve referred them to all my friends. - Antonio Z.