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    One Water Systems

    4.5 (69 reviews)
    Closed 9:00 am - 5:00 pm

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    Response time

    5 hours

    Response rate

    100%

    Services - One Water Systems

    Water purification system cleaning and maintenance

    Water purification system installation

    Water purification system repair

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    High magnesium and calcium (hard water)

    One water promised soft water but their products did not deliver that promise. We purchased their elite 15 system + the additional Central water descaler. Both were recommended to achieve softer water. The water is so hard, I'm unable to wash my hair properly. It feels extremely sticky/waxy after washing my hair due to the calcium and magnesium in the water. I've been having to wash my hair with distilled water, which helped however is extremely inconvenient. With further research, I came upon a salt water shower head, which worked! We've tested the water with testing strips and it shows the water is extremely hard, with the one water systems installed. Extremely disappointed, as we spent thousands of dollars promising soft water but promises were undelivered. Yes- we had one of their technicians check on the system to make sure it's running properly and he said it's good to go.

    Water testing
    Tore D.

    2 years ago, we purchased One Water Systems. It's not cheap, but we are very happy with both the product and their yearly no charge testing. The big advantage is that it's maintenance free. It comes with a 15 year warranty and they come back every year to check on it. And we don't even have to wipe the shower panels, they dry clean! We highly recommend One Water Systems.

    One water system installed in June 2010
    Nagib S.

    I find Kevin's response full of inaccurate statements and false info, first of all there was NO misunderstanding on my part, he was only interested in selling me a new system for $3300, never offered to "try a rebuild for a small fee$900", how could he while he stated in his reply that "equipment is broken and it cannot be repaired with the same components" ! In addition, his tech conducted only 9 check ups or services, not 11, for due to Covid-19, there was no service in 2020. I offered him $2800 for the new system, but he refused, and that's the honest truth! I don't harbor any animosity toward Kevin or want to hurt his business, rather simply and honestly provided feedback on my experience, and wish him and his employees well.

    Me and my hair
    Erin M.

    I have always wanted a whole house water filter mainly for my hair. I noticed after living in Switzerland for 10 years when I came back to the USA my hair was horrible, no matter what conditioner i tried it was always tangled, hard to comb out and just felt and looked horrible and I knew it was because of the crap in the water. I have long hair and I was always wearing it up. Now its such a huge difference with the filtered water. My hair is shiny and soft and no more tangles. People that know me made comments about my hair looking soo great my hair dresser also noticed a difference. Its also nice to be able to drink the water from the tap. I would definitely recommend.

    One Water Whole House Purification System

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    Love their FRESH and CLEAN water. Bought one for our new home too. Also buying one for our daughter and her family. Drew is such a nice guy!

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    Page 1 of 2

    Ask the Community - One Water Systems

    Hi! I love my one water system. The water is delicious compared to other bottled water. I'm becoming very particular. LOL! Please give me details on your air filters. I know…

    I know I love my system too! I would call the office and ask about the air purifier. I've been thinking about getting one of those too. I've heard they are good when we have fires

    Don’t See Your Question? Ask Away!

    Review Highlights - One Water Systems

    I send a text to Kevin the owner ( Who I ad A personal fallout not related for the unit).

    Mentioned in 24 reviews

    Read more highlights

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    Water Purification Systems

    Water Purification Systems

    (66 reviews)

    Kearny Mesa

    Contacted several companies for a whole house water treatment system and a Reverse Osmosis System…read morefor under the sink. Constatine responded very quickly and came to the house to give a quote. He was extremely nice and explained our options without trying to up sale. Pricing was fair and competitive with the other companies we had contacted. We decided to go with Water Purifaciions Systems due to their quick response, great communication, past reviews, workmanship, and their competitive pricing. On the day of install, Constantine and his team arrived when they said they would. Their work was efficient, clean, and custom. We did encounter one issue, but they rolled with it and resolved the issue with no problems. They cleaned up after themselves and went over the system in detail with us. They were patient and answered all our questions. I would definitely recommend Water Purification Systems for your water treatment needs here in San Diego County. Thank You Constantine and to your team.

    Title: Still outstanding after all these years -- WPS delivers every time…read more I left a glowing review for Water Purification Systems over six years ago, and I'm happy to say they're still just as excellent today. Recently, I woke up in the middle of the night to find no water running in my house -- a total shock. (To be clear, this was not WPS's fault.) First thing in the morning, I called them in a panic. They answered promptly, walked me through how to get the water back on, and came out the very next day for maintenance. This review is for their continued care and stellar service over the years. I've had the pleasure of working with Eugene at WPS, and he is consistently professional, respectful, and incredibly competent. He explained that a power outage can disrupt the system's timing, and he patiently taught me how to adjust it so this doesn't happen again. Eugene is thorough, kind, and always delivers top-tier service. I just want to say again how much I recommend this company -- they truly go above and beyond.

    Pure Plumbing Company

    Pure Plumbing Company

    (221 reviews)

    Andrew came out first thing in the morning After I made an…read moreappt the night before. he was professional and knowledgeable. Fixed Our kitchen drain and gave us great advice. Only took an hour and all in all a great Affordable job! Thx!

    I put out a Yelp request in January 2025 to get a new tankless water heater and water filtration…read moresystem, and Bryan came out, walked me through everything, and gave me a solid quote compared to other companies who also came out to the house. He was also very impressive when listening to him explain what our system could look like and what our options would be. At that time, we were already having an ADU built in our backyard, and when the contractor found out we wanted a new tankless heater and water filter installed on our main house, he offered us a discount and installed a tankless heater. It ended up being a big mistake as they did a very sloppy job. Fast forward to this past September 2025, and my wife put out a Yelp request to get a water filtration system installed. She did not know that Pure Plumbing had come out previously, but I recognized Bryan's name when my wife told me he would be coming to the house. He walked my wife through everything while I was at work, and she was impressed by him too. He even pointed out where our contractor's plumber had made a major mistake with our tankless heater. We ended up having Pure Plumbing install the water filtration system, the price was great, and they did a fabulous job. In addition, thanks to Bryan's alertness, we were able to have our contractor's plumber come out to fix their mistake. Thank you Bryan, and thank you Pure Plumbing. I highly recommend this company.

    Quick Water Heater & Filtration Company - Brandon and Jr Plumber

    Quick Water Heater & Filtration Company

    (320 reviews)

    As anyone can guess, losing hot water in your house is a serious matter. The situation is…read moreaggavated when your water heater on the fritz is less than one-year-old! My family faced this situation and I contacted Quick Water Heater for help via Yelp. Within seconds (yes, seconds) Camille reached out to me (on a Sunday) and heard my dilemma. She walked me through their (very intuitive) website and explained the process for me. After agreeing to have a technician visit my home to assess the situation and provide a more accurate estimate, I waited for the next day. My appt was set for 1400 hrs but Erick contacted me asking if I could accommodate his visit earlier, which I welcomed with gusto. By 10AM he was taking a look at my dead appliance. Erick took a look and the mystery of the broken 1-yr-old water heater was resolved. My pressure modulator was dead, so the 150PSI streaming through my house killed the water heater. Erick replaced my water heater, the water pressure modulator and also replaced my main line shut-off valve, which was done as well. Through the process, Erick patiently explained not only WHAT he was doing, but WHY he was doing it. His technical knowledge was impressive and it was only matched by his affable demeanor. Camille and Erick represented Quick Water Heater extremely well. The Dream Team for any service provider. I will add myself to the long list of impressed customers. Well done!

    Highly recommend this team! Ben squeezed us into his schedule to make sure our hot water was back…read moreup and running the same day parts arrived. I am so grateful for their expertise and professionalism and will be sure to use them for any future needs!

    All Cities Water Treatment - Matrix 75 high efficiency Reverse Osmosis System

    All Cities Water Treatment

    (240 reviews)

    Kearny Mesa

    After doing a lot of research on all the various water softener/conditioner options, I knew I…read morewanted to talk to people who specialize in water treatment as I was a bit overwhelmed with all the different information out there. I got in touch with Jaye at All Cities Water Treatment and he helped walk me through everything I needed to know about my water and how to treat it. He candidly answered some of the questions I had along with explaining the different options they offer but never tried to sell me on anything I didn't need. Jaye let me know that once I have a system it's very easy to add things on if I want. Jaye came out to my home for a consultation and to look at the plumbing. He drafted up a plan for the drainage of our new system and we got on the schedule for install the following week. The estimate was extremely fair compared to some others I had received. Eddie arrived promptly and did an amazing job with the install, replacing a failing valve, tucking and hiding piping for the drain. He was super knowledgeable on the system and walked me through the basics of what I needed to do. We are already starting to feel and see that the water is softer and cleaner. I will be recommending All Cities Water Treatment to anyone who is curious about water treatment!

    Top-notch service from beginning to end. Jay was informative and easy to work with, and Jesus…read moredelivered excellent installation work with great attention to detail. Highly recommend!

    Diamond Pure Water Filtration

    Diamond Pure Water Filtration

    (438 reviews)

    This was honestly one of the easiest and best purchases I've made. From the beginning, Mike was…read moreextremely helpful and professional. He took the time to explain everything clearly, gave me all the information I needed, and answered every question I had without making the process feel rushed or pressured. I spent a good amount of time researching different water softener systems because I wanted to make sure I was getting the best system for my money. After comparing several options, I decided to go with Diamond Pure, and I'm really glad I did. The installation process was smooth, quick, and very professional. The technician showed up on time, worked efficiently, and made sure everything was installed correctly. He also walked me through how the system works and answered all my questions so I would know what to do if anything ever came up. What I really like is how simple and easy the system is to understand and maintain. Overall, the entire experience from getting information, to purchasing, to installation was excellent. I highly recommend Diamond Pure to anyone looking for a reliable water softener system and great customer service.

    Exactly as advertised and promised. Mike came to the house, gave me a brief water education and…read moreexplained how their system worked. Picked a date and they came out and installed it. Immediate impact and improvement from our softened and filtered water. Price was very fair and less than I expected. I would recommend for sure.

    Puragain Water

    Puragain Water

    (438 reviews)

    I was tired of getting water each month. I decided to get water filter, I did months of research…read moreand decided to go with this company in 2022. It's been great so far. Kaleb just did a replacement for us today. He answered all of my questions and concerns. He was kinda and patient. Recommended! Tri

    First off the product is good I e had it for four years maybe a little more but today I had a guy…read morecome to test the water and check the filters I also have the alkaline drinking water in the kitchen sink he said if we want we can change the alkaline filter and we need to change the three main ones with the sand or pebbles whatever they are he quoted me at $700 I was like WHAT!!!! When everywhere online it says it can range from $200-$400 but for them to tell me $700 and on top of that I told him that my drinking water starts dying out after two cups he mention that the water tank under the kitchen sink has a ballon he said it's going bad and he wanted to charge me an extra $100 dollars to replace it I thought their product came with warranty and four five years with it I'm like WOW ima try to replace it myself and see what happens ima make some YouTube videos about it try different filters so stay tune but this was a major disappointment today with this Also I tried messaging them on instagram commented on three of their videos they deleted the comment and blocked me from their page lmao I was like Damm so everyone that has something negative gets blocked

    The Goodfor Co Plumbing & Water Filtration - Puronics Defender B Installation in Poway

    The Goodfor Co Plumbing & Water Filtration

    (33 reviews)

    I am extremely disappointed with my experience purchasing a water filtration system from Puronics…read morethrough The Good For Company. During the sales process, we were clearly told that the system being sold to us would filter the water for our entire home. After installation, we later discovered that this was not accurate. The system does not fully filter the water as represented, and we were informed afterward that a reverse osmosis system would be required to properly filter our water to the level we expected. This was never clearly explained to us before purchase. In addition, the long-term service and maintenance costs were not disclosed. We were not informed about the recurring service requirements or the cost of maintenance that would occur every few years. These are significant expenses that absolutely should have been disclosed upfront. We feel we were misled about both the capabilities of the system and the true cost of ownership. Transparency and honesty are critical when making a large home investment, and unfortunately, that was not our experience. I hope this review encourages the company to be more upfront and transparent with future customers about what their systems actually do and the full scope of ongoing costs. But with that said, I do not recommend this company for filtration or water softening. Update: In response to Boris z. Thanks for the detailed reply. However, it still does not address the issue. We are not disputing the equipment installed or the service dates. The concern is how the system was represented during the sales process. Most homeowners are not water treatment professionals. We relied on your company to explain, in plain terms, what the system would and would not do. That did not happen in a way that allowed us to make a fully informed decision. Regarding maintenance, the issue is not that the systems require service. The issue is that the scope and cost of that maintenance were not transparently outlined upfront. Learning years later about substantial service fees, replacement costs, and price increases is very different from being given a clear picture of long-term ownership costs before signing a contract. Saying the system "operated without issue" misses the point. Functionality is not the same as full disclosure. Additionally, your response references specific account details despite this being a general public review. Given that the system is not even under my name, it is concerning that internal records are being used in a way that attempts to publicly attribute and rebut a customer review. That approach feels less like clarification and more like an effort to discredit my experience rather than address the concern. Providing brief technical support on an alkaline filter does not negate the larger issue of sales transparency. Although, you or whoever we spoke to did mention working on some sort of discount towards service or replacement filters. With that said, our review reflects our experience. We hope this review helps future customers so they are given clearer explanations about system capabilities, limitations, and total cost of ownership before making a significant investment.

    It's been 3 years and we still love our water filtration system! Today we got our water filter…read moreservice by Patrick and he was very professional and friendly. Thank you Jane and Boris for great customer service!

    One Water Systems - waterpurification - Updated May 2026

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