1. H2O4U

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    Santa Cruz, CA

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    About H2O4U

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    Services - H2O4U

    Water purification system cleaning and maintenance

    Water purification system installation

    Water purification system repair

    H2O4U Photos

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    Recommended Reviews - H2O4U

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    Photo of Sheri M.
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    10 months ago

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    2 years ago

    Been getting my water from here for 10+ years and will continue for life. Best shop & water ever!!

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    Photo of Mel L.
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    3 years ago

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    4 years ago

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    3 years ago

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    Photo of T L.
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    6 years ago

    These ladies are on it! They run a great business. Super friendly and clean store. I've been a customer for years.

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    5 years ago

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    10 years ago

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    7 years ago

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    9 years ago

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    9 years ago

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    10 years ago

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    10 years ago

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    5 years ago

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    7 years ago

    The ONLY great water available within a radius of 50 miles at an excellent price, with all types of water container stock.

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    13 years ago

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    9 years ago

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    Ask the Community - H2O4U

    Review Highlights - H2O4U

    “I have been a customer with H204U for over 35 years and never had a bad experience.”

    Mentioned in 2 reviews

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    De Anza Water Conditioning

    De Anza Water Conditioning

    4.8(467 reviews)
    21.5 mi
    45 years in business
    Family-owned & operated

    De Anza Water Conditioning installed a water softening system and reverse osmosis (RO) filter…read moresystem in Spring 2026. The installation includes a 1-year service warranty, which has proven very helpful. Side note, if you add a mineral cartridge to your RO system and that RO system supplies an existing copper water/ice line to a refrigerator, be sure to have the ice line replaced with polyethylene tubing. If not, the minerals will degrade the copper ice line, resulting in leaks. Many thanks to José for the super job he did capping our old copper ice line and replacing it with under cabinet-mounted polyethylene tubing--works great, can't see the tubing, no leaks! Many thanks to Niko for resolving a problem we had with melted potassium in the reservoir tank for our softening system. Niko was very patient as he explained the problem and showed me step-by-step how to fix the issue myself if it happens again. He also tested the water until the results confirmed that the problem was resolved. Many thanks to Angel for taking service calls cheerfully and with kindness and efficiency. I really appreciate the great service my family has received from De Anza Water Conditioning. I would hire them again without reservation.

    Very appreciative of De Anza Water Conditioning's responsive and quality service and their…read moretechnician Sonny Vigil's valuable expertise. Our Kinetico system was effecting a major water leak (600 gal over ~28 hours), and I tried reaching them at different numbers after hours; a representative contacted me from each of those lines and set up an appointment the following day, 8a-12p window. Our technician Sonny Vigil arrived at 9AM, very professional and respectful. He explained his triage per step, replaced parts and fixed everything up without hassle. Shared tips about the filtration system and general troubleshooting. He additionally performed a full system checkup and replaced our filters as part of the same service visit; we would've otherwise run out of potable water shortly. Serviced everything efficiently and effectively. I had originally planned to get to work in the afternoon, but everything was resolved and ready to go by 10:30AM.

    Photos
    De Anza Water Conditioning - Commercial systems installed at Centerra Apartments in San Jose

    Commercial systems installed at Centerra Apartments in San Jose

    De Anza Water Conditioning - Residential Water Softener Install

    Residential Water Softener Install

    De Anza Water Conditioning

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    Clean Water Systems & Stores

    Clean Water Systems & Stores

    3.6(12 reviews)
    1.8 mi
    Certified professionals
    Family-owned & operated

    About a year ago my Rheem water softener died so I decided to up my game and purchase one from the…read moreClean Water Systems because I thought they would carry a better product and I would get better service if needed than from a big box store---NOPE! First-I paid almost 3 times as much for the system than if I would have purchased one from Home Depot or Lowes. Second-The installation I had done on this new product was done by a pro and the programming of the unit went well. Third-Soon after the system was installed it began doing erratic things like regenerating at different times than the one that was set. The regeneration time was cleared and reset multiple times only to have the softener revert. Fourth-I called and Emailed the customer service rep. and he tried to correct the regeneration problem by walking me through the steps but none of those fixes worked. He then contacted the manufacturer and they responded with a new fix but that did not work either. Fourth-The owners manual is THE WORST!!! It is just a cobbled selection of random instructions, almost like you walked into the middle of a conversation and then try to understand what is the gist of that conversation. Early on when I commented on this I received a call from someone at the Clean Water Store and she wanted to know and understand how they could improve the manual. I suggested she look at how Rheem or Whirlpool or GE does it. Their instruction/owners manuals whether printed or online are clear and concise. Doing so would probably eliminate many questions and Emails to the service reps. Fifth-Here I am a year later with an outstanding service ticket. A few days ago the rep. contacted me and said he was going to close out that open ticket. I replied the manufacturer never helped us correct the regeneration problem. He stated, they never got back to him. Sixth-My impression and experience shows that once you purchase from the Clean Water Store you are on your own. The service rep. tried his best but like me he was left in the lurch. The warranty on the product from the manufacturer is worthless, it means nothing. The owners of the Clean Water Store should take heed, they can not ignore ongoing product problems that affect their customers. If they continue to not serve their customers, their customers will find a company that does. STAY WAY! You would be better off throwing your hard earned money in the street.

    Order chlorinator system 3 months ago pump went out . Hooked up correctly ,in weather proof area no…read morereason for it to go bad just poorly ,cheap product for 600 plus . Called and said would send new pump . Spoke to tech and customer service and both said would send in for request to have it expedited being we were now smelling rotten eggs in home . Did not approve it and now we have to wait for a week . Called said they can't change it now that's its in route. If would of sent overnight or 2 days because of the inconvenience would of been nice being it's not our fault their system went back so quickly . Wish I just got my money back as it's cheaply made . Same item china for 100 versus 600

    Photos
    Clean Water Systems & Stores
    Clean Water Systems & Stores
    Clean Water Systems & Stores

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    City Water Filter and Hyperbaric - More water damage

    City Water Filter and Hyperbaric

    4.5(435 reviews)
    23.7 mi•Fairgrounds

    I has a great experience with City Water Filter & Hyperbaric and I wanted to recognize the amazing…read moreteam there. Clay runs a fantastic business and clearly cares about his customers and quality of service provided. From the moment I talked to him , everything was professional , organized and welcoming. Javier and Jesse did an excellent work , they were knowledgeable , friendly and took the time to explain everything clearly . You can tell they take pride in what they do and make sure the job is done right . Jennifer was also wonderful , helpful , polite and made the scheduling and communication smooth and easy. Overall the entire team made this a very positive experience , I highly recommend City Water Filter & Hyperbaric to anyone looking for reliable service and a team that truly cares about their customers.

    Very disappointed with the communication and overall service from this company. I was told one…read morething, while my tenant was given different information, which created unnecessary confusion. After the technician completed the filter service, my water filtration system was not working properly. I contacted the owner expecting them to stand behind their work and help troubleshoot the issue. Instead, without performing an official inspection of the system, I was quickly told that the resin likely needed to be replaced and was quoted approximately $500 for another service visit. My system is only about 5-6 years old, so I was concerned that such an expensive repair was being recommended without properly diagnosing the problem first. We later discovered on our own that the actual issue was that the filtration system settings had not been set correctly after the technicians changed the filters. Once the settings were corrected, the system worked. My biggest concern is the lack of communication and proper troubleshooting. Before recommending a customer spend another $500, especially immediately after your technicians serviced the system, I would expect the company to first verify that the work was completed correctly and that the system settings were properly configured. Unfortunately, based on my experience, I would not recommend this company.

    Photos
    City Water Filter and Hyperbaric - Ozone on washing machine

    Ozone on washing machine

    City Water Filter and Hyperbaric
    City Water Filter and Hyperbaric - Double System in Oakland removing sediment particles, chloramines, and fluoride removal tanks

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    Double System in Oakland removing sediment particles, chloramines, and fluoride removal tanks

    Paradise Water Delivery Service - Crystal Springs Drinking Water Analysis (pg 1 of 2). From a single sample Jan 25, 2026

    Paradise Water Delivery Service

    4.7(24 reviews)
    47.9 mi

    My family used to drink LOTS of individual bottles of water, but we got sick of hauling it from…read moreCostco and then having to deal with lots of empty plastic bottles. I looked into getting water delivered in jugs from Costco, but I didn't like the idea of being locked into a subscription plan for the water AND paying them a monthly fee to rent the water dispenser. I found Paradise Water and they've been great. I just send a text message when I'm running low, and they deliver exactly the jugs I need to my house. There's no subscription, so if we need more or less it's no problem. I ordered a Bottle Buddy water bottle stand from Amazon, which has been a great solution. It's cheaper, the water tastes good, AND it's more environmentally friendly.

    Jose is responsive and very reliable! After sending him a text to request for waters, I am able to…read moreget waters the next day, or at the latest, within a week which is great service. I have requested water deliveries in San Francisco and Oakland and all deliveries are smooth. He delivers the waters to your apartment, which is much better than lugging gallons of water from the store to the apartment. Would recommend!

    Photos
    Paradise Water Delivery Service - Crystal Springs Drinking Water Analysis (pg 2 of 2)

    Crystal Springs Drinking Water Analysis (pg 2 of 2)

    Paradise Water Delivery Service - Oooohsooonice to come home to at the end of the day!! And yes, they deliver the 3gal size to the Bay Area!

    Oooohsooonice to come home to at the end of the day!! And yes, they deliver the 3gal size to the Bay Area!

    Paradise Water Delivery Service - Yup--I am a sucker for little personal touches... made me smile after squealing in delight to see the happy little bottles...

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    Yup--I am a sucker for little personal touches... made me smile after squealing in delight to see the happy little bottles...

    H2O4U - waterpurification - Updated October 2026

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