The filter casing started to leak for my under sink RO system, so I needed to replace the complete casing, cap & mug assembly. I had to wait long because the parts were back ordered. But once things a... See more
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Pricing was good and the filter quality appears very good. However, there were no filter to piping adapters included or available for purchase through your website. This would be handy if you are inte... See more
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Ordering and Delivery were painless. The only reason I didn't rate 5 stars was that some of the John Guest Valves and Tees were not found via search, I had to go elsewhere to find the part number to... See more
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Always appreciate the availability of this item for truly, clean drinking water through a countertop version, which works great with our rental home. The instructions are pretty plain, but I will say... See more
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Company details
Written by the company
#1 US Home Reverse Osmosis & Water Filter Systems | APEC Water. With 25 years of customer support & quality, APEC is the top reverse osmosis home water filtration system. Learn about our home water treatment systems here.
Contact info
1550 Valley Vista Drive, 91765, Diamond Bar, United States
- 8008804808
- support@apecwater.com
- apecwater.com
4.1
Great
783 reviews
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Replied to 95% of negative reviews
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broke twice and flooded our basement
9 February 2026
Reply from APEC Water Systems
Dear Suoyang,
Thank you for sharing your feedback. We sincerely apologize for the inconvenience you’ve experienced. We always strive to work closely with our customers to resolve any issues or concerns with our products.
According to our records, one of our representatives is actively working on your case to resolve it as quickly as possible. We truly appreciate your time, effort, and patience in working with us, and we remain committed to ensuring a positive experience with our products.
Thank you again for your understanding and for giving us the opportunity to assist you.
Best Regards,
APEC Customer Service
Great products at a fair price with…
Great products at a fair price with rapid delivery at the expected time and date.
18 September 2025
Reply from APEC Water Systems
Dear Bruce,
Thanks so much for sharing your experience! We’re glad you found great value in our products and that delivery was right on time. We look forward to serving you again.
Best Regards,
Karen
APEC Customer Service
Great filter & really easy to install.
Great filter & really easy to install.
Filter did a great job cleaning up my local water coming into my house.
5 June 2025
Reply from APEC Water Systems
Dear Narg,
We truly appreciate your kind words! It’s wonderful to hear that the 2-stage whole house filtration system was simple to set up and has already made a noticeable difference in your water quality. Knowing it’s helping your home means so much to us, and we’re excited to keep supporting your family’s water needs.
Best Regards,
Karen
APEC Customer Service
Reply from APEC Water Systems
Dear Sandeep,
Thank you for sharing your feedback with us. We truly appreciate the time you took to address these concerns and are glad we were able to arrange a replacement filter for you promptly. Rest assured, we have forwarded your feedback to our Order Fulfillment team for further review, as we always strive to ensure every order is handled with the highest quality standards.
We also understand the importance of making maintenance easy, and we hope you receive the membrane housing wrench soon so that replacing the RO membrane will be more convenient.
Please know that we are always here to support you and address any order concerns or inquiries you may have. Your satisfaction is very important to us, and we look forward to providing you with a smoother experience in the future.
Best Regards,
APEC Customer Service
Reply from APEC Water Systems
Dear Beau,
Thank you so much for your wonderful feedback! We’re thrilled to hear you had a great experience with our filtration system. Your satisfaction truly means the world to us, and we look forward to continuing to serve you and your family for all your water needs.
Best Regards,
Karen
APEC Customer Service
I needed a replacement uv light for my…
I needed a replacement uv light for my APEC water filtration system, but APEC’s website said their bulb was discontinued and identified an alternate. I went to the alternate’s website only to find that bulb also was discontinued. I emailed APEC’s engineers online for another solution and received no response. I now have a water filtration system that will be useless when my current bulb dies - and it’s only 6 years old. Poor customer service and short-lived tech. Will not buy from them again.
13 January 2026
Reply from APEC Water Systems
Dear Laura,
Thank you for sharing your feedback with us. We sincerely apologize for the inconvenience you've experienced and are committed to resolving the issue as quickly as possible.
To better address your concern, a support case has been created and a separate email has been sent to you. Please review the email and respond so we can assist you further.
At your earliest convenience, you can also reach us at 800-880-4808. We’re available Monday to Friday from 8 AM to 5 PM Pacific Time. Our team is dedicated to providing you with a 5-star customer service experience, and we’ll do everything we can to assist you.
Best Regards,
Karen
APEC Customer Service
When I ordered the parts the sales guy…
When I ordered the parts the sales guy said it would ship within the week, two and half weeks later I received the shipment. The part was broken. Fortunately, I paid extra for shipping insurance. Now I get to wait another...
13 January 2026
Reply from APEC Water Systems
Dear Larry,
Thank you for sharing your experience with us. We sincerely apologize for the delay in shipping—our New Year promotions brought in a very high volume of orders, which extended processing times, and we truly appreciate your patience.
We’re also sorry that the cap set arrived damaged, likely during transit. We’re glad, however, that your replacement was promptly processed through Order Protection.
Your satisfaction is very important to us, and we look forward to providing you with a smoother and faster experience in the future.
Best Regards,
APEC Customer Service
Excellent Customer Service
Excellent customer service. I have used APEC products for many years now and they are outstanding.
13 January 2026
Reply from APEC Water Systems
Dear Robin,
Thank you so much for your kind review! We’re delighted to know you’ve had such positive experiences with our products and the support provided by our customer service team. Your satisfaction is our priority, and we look forward to continuing to serve you.
Best Regards,
Karen
APEC Customer Service
Reply from APEC Water Systems
Dear Jordan,
Thank you so much for your kind words! We’re delighted to hear that our team was able to assist you and ensure your order was successfully reshipped. Your satisfaction means a lot to us, and we’re committed to providing you with reliable service every step of the way.
Best Regards,
Karen
APEC Customer Service
I learned right after purchasing this…
I learned right after purchasing this filter that my city uses chloramine. This filter is good for chlorine, but not for chloramine. I read many, many reviews and learned that the filter will fail me after a short time.
There used to be a CuZn filter for chloramine, which is no longer available. I would love to get my $ back, but it is not worth the cost for me to send it back, plus restocking fee - it is brand new and still in its original packaging...
Not sure I will be able to use it.
Update - Feb 23, 2026
Was able to return for a full refund. The filter was brand new, still in the original package. Did have to pay for shipping it back.
11 January 2026
Reply from APEC Water Systems
Dear Belle,
Thank you for sharing your feedback with us. The UC‑200 filter is designed to last up to 5 years, depending on your tap water quality and household usage. If your water has low levels of chlorine, sediments, hardness, and TDS, the filter can reach its full lifespan. However, higher levels of chlorine or chloramine—especially chloramine—can reduce the lifespan to about 2–3 years, and elevated hardness, sediments, or TDS may also shorten performance.
We understand your concern and want to let you know that APEC accepts returns for unused products in their original packaging within 30 days of purchase. Returns may be subject to a restocking fee depending on the condition of the product. Please feel free to reach out to our support team at 800-880-4808 for assistance with the return process. We’re available Monday to Friday from 9 AM to 5 PM Pacific Time.
Best Regards,
APEC Customer Service
Great telephone customer service
Great telephone customer service. Shipping was slow, but hey thats life sometimes.
12 January 2026
Reply from APEC Water Systems
Dear Bert,
Thank you for your kind words! We’re so glad our customer service team provided a great experience, and we truly appreciate your patience with shipping. We look forward to serving you again!
Best Regards,
Karen
APEC Customer Service
Peace of mind for my family and pets
Great product at a great price. Love the auto ship of the filters. Our local water quality is terrible and our state does not care. Filtered at the tap for peace of mind for my family and pets.
12 January 2026
Reply from APEC Water Systems
Dear Matt,
Thank you so much for your wonderful feedback! We’re thrilled to hear that our RO‑PH90 replacement filters provide peace of mind for your family and pets, especially with the challenges of local water quality. Your satisfaction means the world to us, and we’re glad the subscription option makes it even easier to stay protected. We look forward to continuing to serve you and your family for all your water needs.
Best Regards,
Karen
APEC Customer Service
It was simple to set up
It was simple to set up. I had to buy a few items to complete but very easy
13 January 2026
Reply from APEC Water Systems
Dear April,
Thank you so much for your feedback! We’re happy to hear that setting up your ROES-PH75 system was simple and easy overall. Your satisfaction truly means a lot to us, and we appreciate you choosing us for your water filtration needs. We look forward to continuing to serve you and your family with clean, great-tasting water.
Best Regards,
Karen
APEC Customer Service
Best Countertop RO System
Always appreciate the availability of this item for truly, clean drinking water through a countertop version, which works great with our rental home. The instructions are pretty plain, but I will say as others have said, it is nearly impossible to ever get a hold of anyone by phone for direct questions. It would be nice if they could address this issue.
15 December 2025
Reply from APEC Water Systems
Dear Jonna,
Thank you for taking the time to share your experience! We’re so glad to hear that the countertop system has been a great fit for your rental home and that you’re enjoying truly clean drinking water. It’s wonderful to know the product is meeting your needs and providing the convenience and performance you were looking for. We truly appreciate your feedback and look forward to continuing to support you and your household with reliable water solutions you can count on.
Best Regards,
Karen
APEC Customer Service
We LOVE our two APEC water system…
We LOVE our two APEC water system (whole house and ro)!
13 January 2026
Reply from APEC Water Systems
Dear Nancy,
Thank you so much for your feedback! We’re thrilled to hear that you’re enjoying both your APEC whole house and RO systems. It means a lot to know our products are making a difference in your home. We truly appreciate your support and look forward to keeping great water flowing for you for years to come!
Best Regards,
Karen
APEC Customer Service
I have bought two RO system over the…
I have bought two RO system over the years both of them have worked great, I install a new 4-gallon tank on it the other day, no big deal, thank you
13 January 2026
Reply from APEC Water Systems
Dear Craig,
Thank you so much for taking the time to share your experience! We’re thrilled to hear that both of your RO systems have worked great for you over the years and that installing the new 4-gallon tank was a smooth process.
Your satisfaction truly means the world to us, and we look forward to continuing to serve you and your family with reliable, great-tasting water for years to come.
Best Regards,
Karen
APEC Customer Service
will not accept my credit card to place…
will not accept my credit card to place order
13 January 2026
Reply from APEC Water Systems
Dear Dennis,
Thank you for sharing your feedback with us. We sincerely apologize for the inconvenience you've experienced and are committed to resolving the issue as quickly as possible.
To better understand and address your concern, a support case has been created and a separate email has been sent to you. Please review the email and respond so we can assist you further.
At your earliest convenience, you can also reach us at 800-880-4808. We’re available Monday to Friday from 8 AM to 5 PM Pacific Time. Our team is dedicated to providing you with a 5-star customer service experience, and we’ll do everything we can to assist you.
Best Regards,
Karen
APEC Customer Service
Quick service
13 January 2026
Reply from APEC Water Systems
Dear Lisa,
Thank you for your feedback! We’re glad to hear that your replacement filters were delivered on time. We appreciate your support and look forward to serving you again.
Best Regards,
Karen
APEC Customer Service
works great wouldnt use anything else
12 January 2026
Reply from APEC Water Systems
Dear Gregory,
Thank you for your feedback! We’re glad to hear the ROES-50 replacement filters are performing so well and have earned your trust. We truly appreciate your support and look forward to continuing to meet your water filtration needs.
Best Regards,
Karen
APEC Customer Service
It works great.
11 December 2025
Reply from APEC Water Systems
Dear Ernest,
Thank you for taking the time to share your experience! We’re so glad to hear the replacement filters worked well for you. Your support means a lot to us, and we’re happy to be part of keeping your water clean and fresh.
Best Regards,
Karen
APEC Customer Service
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