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McCowin Water has been in business since 1972! The reason for our tremendous success is our attention to detail and the way we treat people. As far as we are concerned, we believe in treating people like family and earning your trust. We answer all questions and address all your concerns and provide you with exactly what you want – Clean water and peace of mind!

We are very humbled by the reviews and testimonials of our customers below. We’ve included both published and unpublished. Discover why people say McCowin Water is the #1 Choice for Water Filtration in Orange County, CA.

I just got a whole-house water filtration/softening/reverse osmosis system installed in my new home. Two installers arrived at my house promptly and explained exactly what they were going to do. After completing the job at the promised completion time, they provided an in-depth explanation of the system.  The installers were very friendly and pleasant to deal with. The installation was done neatly and professionally, and they cleaned up afterwards. The sales manager, Scot, followed up after the installation to ensure I was satisfied. The fact that the company is local gives me a piece of mind that I can call on them in an emergency and that they will respond quickly.  I’m a satisfied customer and would highly recommend this company to anyone wanting ultra clean water.- Andy C – Irvine

Our family has been a customer of McCowin Water for over 5 years.  Brian installed 2 new water purification systems in our home and has been maintaining them over that entire period.  They have performed flawlessly, and we couldn’t be happier with the service we receive from the entire McCowin water team.  Brian has also serviced our water softener because the company that sold it to us originally is no longer in business.  The model we purchased happens to be a model that has recurring issues.  Brian has been able to resolve the issues and get our unit up and running every single time, which has prevented us from the cost of a complete replacement.  Most recently Brian returned my call promptly and went out his way to help me get my problem solved.  Thank you to Brian and the McCowin Water team for good, old fashioned customer service! - Linda W – Mission Viejo

We needed to replace a reverse osmosis water system. I went to a local water store in San Clemente. They did not call me back and there was poor service. I put a request in the internet for a quote on a new system and Brian McCowin responded right away.


He came to my home and showed us several options to replace our old system. He installed it next day. He charges a fair price, and he does a great job. Fast and efficient. he even adjusted our water softener system. I highly recommend him for your water systems and plumbing. Peter P – San Clemente

McCowin Water is an exceptional provider of water solutions and a great company to do business with. We have used McCowin Water for 15 years and continue to be impressed and highly satisfied with their professionalism, strong ethics, product value and expertise in this specialized field.

The ownership and the employee staff are conscientious, knowledgeable and customer oriented. Terry & Denise S – Huntington Beach

We have been doing business with Brian since we moved to southern California 19 years ago.  Our first water purification home system lasted 18 years and performed above our expectations.  We replaced it last year and Brain was our first choice.  Our new system incorporates more advanced technologies (to offset the less pure water we now get from the city line), and we are very pleased with its performance.  The quality of Brian’s systems is very high, and the price is very competitive.

Rick V – Huntington Beach

Brian and the entire McCowin Water team have been extremely professional, caring, and courteous to my family for over five years now. The water filtration system you utilize is a very important decision for any family, and we are very pleased that we chose McCowin Water over all of the other companies.


The customer service has been very responsive and outstanding at all times. They are always timely with their follow up and maintenance program to ensure we always have the safest and cleanest drinking water possible. Clay S – Mission Viejo

Brian is a pleasure to work with, he is honest, extremely knowledgeable about water and the various systems to treat it. He is positive and always follows through! Brian installed systems for my family many years ago, years later, as an interior designer, I am confident to recommend McCowin Water to my clients for their homes! Chelsea S – Los Angeles

Great company!!! I’ve been doing business with them for years. I highly recommend them. Michelle E – Orange

I purchased a home purification system and alkalizing Reverse Osmosis machine for our household and for those of my two (adult) children who live nearby.  We are all so happy with the actual machines and what they do (water tastes fabulous and clothes – and bodies! – are so much cleaner with so much less soap!) but the real boon is to have bought these systems through McCowin Water.  What a wonderful company! Expert advice as to which units would best suit our needs, expert installation, perfect coordination of services.  I truly feel our 3 families have made a friend who has our health and maintenance of our machines listed as a high priority. We couldn’t be happier.

Mary R – Newport Beach

I was extremely satisfied will McCowin water system The Hague is remarkable I have had for a year and it has consumed less than 1.5 bags of salt, to think how much my 17 year Culligan system wasted down the drain is just sad at $8.00 a bag!
Thank you Brian for offering the best. Art L – Newport Coast

McCowin Water has serviced our home for over 10 years. Brian has always given us “Best-in-Class” service and had our best interest in mind. He is very knowledgeable, friendly, and professional. We highly recommend McCowin Water for your water servicing needs. You’ll be glad you did! Greg E. Trabuco, CA

McCowin water has been wonderful to work with! Brian, in particular is always very responsive, timely and organized. He’s very knowledgable with the products they offer as well as water purity in general. We have a purified water system installed in our kitchen with Insta-hot boiling water which comes in very handy almost everyday! We feel great knowing our family is drinking pure water without wasting plastic bottles or endangering babies/children with the choking hazards of plastic bottle caps. Thanks McCowin water for being a reliable vendor for us!

Lindsay G. Irvine, CA

I love this guy. He’s been handling my water filtration at home and work for years. Our office just moved last month and he came right out and de-installed our filtered water and took it out and sanitized it all and then re-installed it at our new location right away. I forgot to tell him the Landlord wanted copper piping. He installed poly (which is better in my opinion) and I had to call him to come back out because I had forgotten to check and the Landlord does insist on copper. He came right back out. Always cheerful and businesslike. Use this guy!!! Angela P. Westminster, CA

Read more of our 5 star reviews 

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