1. De Anza Pure Water

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Cupertino, CA

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De Anza Pure Water

3.0 (28 reviews)
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Services - De Anza Pure Water

Water purification system cleaning and maintenance

Water purification system repair

De Anza Pure Water Photos

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Dawei S.

The owner is untrustworthy. Never put deposit. Your money could be gone for any reason (store transfer or just "policy change"). I purchased the deposit card but didn't use it inside for water due to obvious reason during last year. Then when I tried to use the deposit card the owner said it expired after one year. He didn't tell me about this policy when I paid and there is no such a policy on the card. Even I would like to pay the possible price difference, he still insisted that the card expired and even stepped up to me almost face to face to threat me to leave his store. Oh, forget to say, I purchased 5 gallon water buckets from him and one bursted out in the car during driving without hitting anywhere. Check them you will find the bucket is so thin.

George C.

This store is selling hand sanitizer at a gauging price that has no alcohol content despite's the label says 70% alcohol. If you bought any of such hand sanitizer from this store that looks like the one I bought there, stop using it because it does not work and you may be catching the virus despite you think your hands are clean by using it! I am really mad about such unethical practices at this pandemic time. Gauging price is still acceptable if the product itself works. I would really think twice to ever purchase any product from this store after this experience,,, Strobgly advice to avoid this store! How do you know there is no alcohol in it one may ask... If it has alcohol, as soon as it gets applied to you hands, you will feel the coolness as the alcohol evaporates from your hands. This product did not have that feeling at all... that made me really suspicious so I did another experiment with it. I squezed it on to a cup and light a match over it and it did not catch fire... I used another hand sanitizer that I bought over CVS that only has 65% ethyl alcohol and it catch fire right away and burnt for a while. This is how I concluded there is no alcohol in this product!

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6 months ago

A very friendly, clean and up to the schedule place with high quality pure water. Highly recommended

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6 months ago

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7 years ago

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6 years ago

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15 years ago

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8 years ago

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7 years ago

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6 years ago

Business owner information

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Minh D.

Thank you Harry !

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4 years ago

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14 years ago

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10 years ago

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6 years ago

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7 years ago

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13 years ago

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6 years ago

Very unfriendly bordering rude. I went there once and found it cramped also. I found another store in the area and am happy now.

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7 years ago

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8 years ago

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13 years ago

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15 years ago

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12 years ago

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10 years ago

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11 years ago

Good tasting water, a cleaning fountain spray. The price is good. They stick to their hours. Simple and perfect.

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10 years ago

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Review Highlights - De Anza Pure Water

“However, they invest in a very high quality filtration system and have clean, good tasting water.”

Mentioned in 3 reviews

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De Anza Water Conditioning

De Anza Water Conditioning

(477 reviews)

DeAnza Water is our local water softening company and I'm glad we chose them. Our technician,…read moreBenjamin and Salesperson Raoul were extremely helpful throughout the entire process of getting our system installed. We really appreciate the thoroughness in explanation and responsiveness of the office. The kinetico system also feels great because it draws no power and we don't have to deal with regeneration interrupting water use every so often. Great value considering we got piping for a bypass valve done as well. Would recommend!

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.

Silk Water

Silk Water

(65 reviews)

East San Jose

I can't recommend Silk Water enough. Trung (the owner) is a licensed plumber who has the skils to…read moreprobably take on any plumbing job but he decided to focus on wafer softener/filters only. "I don't have a drain", "I don't have a soft water bypass", "Will soft water kill my plants?", "There is no electrical outlet nearby", "Will my water pressure drop?". If you are like me, you will be putting off installing a water softener because you are stressed over these things. My advice after this experience - DON'T. You don't realize how you have "tolerated" hard water until you finally experience soft water. The "feel" (for lack of a more scientific term) is just so different. And Trung will take care of EVERYTHING from start to end, in what is overall a very stress-free experience. He installed a sediment filter, a carbon filter tank, a 46 grain water softener, created soft water bypasses for all of my outdoor irrigation, a bypass for the whole softener/filter system in case anything ever goes wrong with it, and a drain (with p trap and air gap). He had a buddy who helped with installing an electrical outlet (also licensed). I was specifically looking for a softener with a Clack WS2 control valve (reputed to be highly reliable) and Trung supplied that. In fact he supplied everything. He also tested my water hardness to ensure I was asking for the right things. Price, quality of work and timeliness was 11/10 (I will add that his price is substantially fairer than those general plumbers who will quote you 10k off the bat - the audacity!). But here is the differentiator - Trung's sense of accountability. Everytime I requested something, I would apologize... but his response? "No problem it is my job". Wow. Please give your business to Trung. This is a 100% genuine review from a 100% grateful and satisfied customer.

Rating: 4/5 I hired…read morethis company to install a whole-home AFW Filters setup with a stainless-steel pre-filter, dual pressure gauges, a dedicated irrigation bypass, and a 2-inch P-trap with a standpipe tied directly into my crawlspace main drain. They charged me $2,750 for the complete rough-in and installation labor. It has now been a few months since the installation, and most importantly, everything is working exactly as it should. The system holds pressure perfectly, the filtration setup is fully functional, and I have not had any operational issues. My concerns are mainly around the aesthetics and overall finish of the installation, rather than its functionality. The installer originally used steel flex hoses that were not rated for outdoor use, even though my contract specifically called for rigid copper. I had to ask him to come back the following day and replace them. That change appears to have affected the final layout. The main upper copper line is noticeably not level, which also leaves the electronic valve head on top of the filtration tank sitting slightly tilted. Because the stainless-steel pre-filter had originally been positioned for the flexible hose configuration, the switch to rigid copper resulted in several street elbows being used to create an awkward offset rather than repositioning the equipment for a straighter, cleaner run. The soldering could also have been cleaner. There are visible hardened solder drips and excess residue on some of the copper connections. None of this has affected performance, but it does detract from the appearance of what otherwise feels like a premium system. My only remaining question is long-term ease of maintenance. Because of the tight pipe geometry and positioning around the pre-filter, I am not yet sure how convenient it will be to change the filter cartridge or service components when the time comes. I won't really know until I have to do the first cartridge replacement. Overall, though, after several months of use, I am much more comfortable giving the installation 4 out of 5 stars. The system works very well, the price was fair for the overall scope of the project, and I have had no reliability issues. I just wish a little more attention had been given to layout, alignment, solder cleanup, and future serviceability so that the workmanship visually matched the quality of the system itself.

De Anza Pure Water - waterpurification - Updated October 2026

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