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
Company replied
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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
- #9 of 11 best companies in Water Purification Company
- #10 of 12 best companies in Water Filter Supplier
- #1 of 1 best companies in Water Softening Equipment Supplier
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
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 95% of negative reviews
Typically replies within 24 hours
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My RO system developed a leak
My RO system developed a leak. I replaced the o-rings believing that might fix it. That didn't t work so I called tech support. I never suspected a cracked filter cap but thanks to the advice that was it.
March 11, 2026
Reply from APEC Water Systems
Hello Richard,
Thank you for sharing your experience with us. We’re glad to hear that with the advice from our tech support, you were able to identify the cracked filter cap as the source of the leak and resolve the issue.
We appreciate your feedback and are happy that our team could assist you in troubleshooting your RO system.
Best regards,
Aisle A.
APEC Customer Service
Hello,
Hello,
I would give no stars if that was an option quite frankly.
I just received my order of 2 chloride filters….I am very disappointed in how they were packaged this time. It looks like they were thrown in the box and upon opening the box - the plastic wrap on both are torn and open. This is suppose to be going into my clean water filtration system and is now open and extremely dirty.
I have bought my filters from this company in the past with individual boxing with bubble wrap protecting the filters wrapped in plastic. I bought filters 2 years ago from this company with a way higher standard of packaging.
This is extremely frustrating and very poor customer standards if this is how your products are being shipped currently. I understand that this is a difficult market but these filters are not cheap and I will be searching elsewhere for my filters when placing my next order.
March 11, 2026
Reply from APEC Water Systems
Hello Lisa,
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,
Aisle A.
APEC Customer Service
Reply from APEC Water Systems
Hello,
Thank you for your kind feedback. We’re glad to know that our reorder program has been efficient and helpful for you. We truly appreciate you taking the time to share your experience.
Best regards,
Aisle A.
APEC Customer Service
Auto replacement filters
Every 6 months I get a new set of filters automatically. That way I don't have to remember to order them. The price is fair, and I just wait for them to arrive, and install them. It's great!
March 11, 2026
Reply from APEC Water Systems
Hello James,
Thank you for sharing your feedback with us. We’re delighted to hear that our automatic filter replacement program has been convenient for you. Knowing that you don’t have to worry about remembering to order, and that the filters arrive on time at a fair price, is exactly the experience we aim to provide.
We truly appreciate your continued trust and look forward to serving you again.
Best regards,
Aisle A.
APEC Customer Service
Clearly labeled replacement products.
Clearly labeled replacement products.
The replacement filters work. We have clean water flowing; there are no leaks. Self-installation was clearly guided with the packaged instructions.
February 10, 2026
Reply from APEC Water Systems
Dear Valued Customer,
Thank you for sharing your experience! We’re so glad to hear that the ROES-50 replacement filters were clearly labeled and easy to install. It’s wonderful knowing the instructions helped guide you through a smooth setup, and that you now have clean water flowing without any leaks. Your confidence in the system means a lot to us, and we’re committed to keeping things simple, reliable, and effective for all your water needs.
Best Regards,
Karen
APEC Customer Service
Filters were exactly what I ordered, and at a small discount!
I rx products I ordered in good condition & was able to install them fairly easy!
February 10, 2026
Reply from APEC Water Systems
Dear Jim,
Thank you for your feedback! We’re glad to hear the filters arrived exactly as ordered, at a great value, and in good condition. It’s wonderful that installation was straightforward and hassle‑free. We appreciate your trust in our products and look forward to continuing to provide you with reliable water filtration solutions.
Best Regards,
Karen
APEC Customer Service
Easy process!
Easy to find the filter I needed, on-time delivery, easy-to-follow filter change instructions.
February 9, 2026
Reply from APEC Water Systems
Dear Kia,
We truly appreciate your thoughtful feedback! It’s wonderful to hear that finding the filter was simple, delivery was prompt, and the instructions made installation easy. Your satisfaction means so much to us, and we’re excited to continue providing you and your family with clean, refreshing water for years to come.
Best Regards,
Karen
APEC Customer Service
Hiqh quality product. Fantastic instructions!
Every product I have purchased from APEC has been of high quality and made in the USA. I got the ROES-75PH and installed it in a couple of hours with absolutely no plumbing knowledge. I did have to ask a plumber friend one question about my water main valve, but that was a question about the house, not the product. The instructions provided with this product were AMAZING. Every question I thought of as I was going along was literally answered on the next line haha. It was like it was reading my mind. I have already referred my friends and family, and I hope more people can feel confident in their purchase decision from my review (:
February 9, 2026
Reply from APEC Water Systems
Dear Sean,
We truly appreciate your thoughtful review! It’s wonderful to hear that you found the ROES‑PH75 installation straightforward and that our instructions made the process smooth, even without prior plumbing experience. At APEC, we take pride in delivering high‑quality products and clear guidance so customers can feel confident every step of the way.
Thank you for recommending us to your friends and family—your trust and support mean the world to us. We’re honored to have you as part of the APEC family and look forward to serving you again!
Best Regards,
Karen
APEC Customer Service
Customer 20+ Years
I've been a customer for over 20 years and wouldn't ship anywhere else!
February 9, 2026
Reply from APEC Water Systems
Dear Kenneth,
Thank you for your loyalty and kind words! Being an APEC customer for over 20 years means so much to us, and we’re truly grateful that you continue to choose us. Your support inspires us, and we look forward to serving you for many more years to come.
Best Regards,
APEC Customer Service
Easy website to navigate and order
Easy website to navigate and order. Also, quick shipping.
February 9, 2026
Reply from APEC Water Systems
Dear Jeff,
Thank you for sharing your feedback! We’re delighted to hear that you found our website easy to navigate and that your order arrived quickly. Your positive experience means a lot to us, and we look forward to serving you again.
Best Regards,
Karen
APEC Customer Service
Our system was unrepairable
Our system was unrepairable. The parts I ordered were returned. Apec customer service gave clear instructions and my account was promptly credited.
February 9, 2026
Reply from APEC Water Systems
Dear Joe,
Thank you for sharing your experience! We’re glad to hear that our customer service team was able to provide clear guidance and promptly process your return and credit. Your satisfaction is very important to us, and we appreciate your continued trust in APEC for your water filtration needs.
Best Regards,
APEC Customer Service
Excellent customer service
It would be helpful if your computer system would show exactly what we ordered in the past to expedite the routine replacement of filters. Either tie it to our name, telephone number, or email. We would spend less time, or no time, on the phone with customer service
February 10, 2026
Reply from APEC Water Systems
Dear Alexander,
Thank you for sharing your suggestion! We’d like to let you know that our system does maintain a record of each customer’s purchase history, which we can quickly retrieve using your name, phone number, or email. This helps us identify past orders right away and makes routine filter replacements faster and more convenient. We truly value your continued support and look forward to serving you with ease every time you order.
Best Regards,
Karen
APEC Customer Service
This is my second apec ro system
This is my second apec ro system. The other one I sold with the house. No problems whatsoever. Quality build. I love the rs100 because of the bigger flow rate and also the one-to-one discharge
February 9, 2026
Reply from APEC Water Systems
Dear John,
Thank you for sharing your experience! We’re delighted to hear that you’ve chosen APEC again and that your ROES-100 system has been performing so well. It’s wonderful to know you value the quality build, higher flow rate, and efficient pure-to-drain ratio. Your continued trust means a great deal to us, and we look forward to supporting your home with clean, refreshing water for many years to come.
Best Regards,
APEC Customer Service
I was able to find the correct replacement parts at a competitive price!
I was able to find the correct replacement parts I needed at a price that was competitive with a big online retailer. Further, APEC Water Systems provided instructions that helped ensure I purchased the correct part based on the type of system I had. They processed and shipped my order promptly and it arrived safely, given they packed the glass and bulb with care.
February 9, 2026
Reply from APEC Water Systems
Dear O Klose,
We truly appreciate your thoughtful review! It’s great to hear that you found the right UV filter kit at a fair price and that our guidance helped you select the correct part for your system. We’re also glad the order was handled quickly and arrived safely with careful packaging. Thank you for choosing APEC—we’re committed to supporting you with quality products and dependable service every step of the way.
Best Regards,
Karen
APEC Customer Service
Happy Customer
Great company, excellent product and solid support. I have been a long time customer!
February 9, 2026
Reply from APEC Water Systems
Dear David,
Thank you so much for your kind words! We’re delighted to know you’ve had such a positive experience with our products and support. Your loyalty means everything to us, and we look forward to continuing to provide you and your household with dependable water solutions for years to come.
Best Regards,
Karen
APEC Customer Service
Reply from APEC Water Systems
Dear Steve,
Thank you for your feedback! We’re glad to hear that installation, filter replacement, and ordering parts have all been simple and convenient for you. Making things easy and reliable for our customers is always our goal, and we’re happy to know we’ve met your expectations.
Best Regards,
APEC Customer Service
Quality products and rapid response
February 9, 2026
Reply from APEC Water Systems
Dear Roberta,
We truly appreciate your kind words! It’s wonderful to hear that you’re pleased with the quality of our products and the prompt support from our customer service team. Your satisfaction is very important to us, and we look forward to continuing to provide you and your family with dependable service and clean, great-tasting water.
Best Regards,
Karen
APEC Customer Service
I had another RO system before and this…
I had another RO system before and this one makes the water taste better. Very happy.
February 9, 2026
Reply from APEC Water Systems
Dear Michelle,
Thank you for sharing your experience! We’re thrilled to hear that the RO-PH90 system makes your water taste even better compared to your previous RO unit. Knowing you’re very happy with the upgrade means a lot to us, and we look forward to continuing to provide you with clean, great-tasting water for years to come.
Best Regards,
Karen
APEC Customer Service
material arrived on time
material arrived on time, easy to install. filtered water is great.
February 9, 2026
Reply from APEC Water Systems
Dear Ted,
Thank you so much for your feedback! We’re glad to hear your order of replacement filters arrived on time, was easy to install, and that you’re enjoying the fresh, great-tasting filtered water. Your satisfaction 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
Reply from APEC Water Systems
Dear Connie,
Thank you so much for your feedback! We’re sorry to hear the tank arrived with a minor dent, but please rest assured this is typically cosmetic and should not affect performance.
We’re delighted to know you’re extremely satisfied overall, and your satisfaction means the world to us. We look forward to continuing to serve you and your family for all your water needs.
Best Regards,
Karen
APEC Customer Service
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