Reverse Osmosis (RO)

No Hot Water? No Problem.

     EXCELLENT  
  1735 reviews

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Reverse Osmosis Water Filtration Systems

The Gold Standard for Drinking Water Purity

When it comes to achieving the cleanest, purest drinking water possible, few systems can match the performance of Reverse Osmosis (RO) filtration. Unlike standard point-of-use filters that reduce chlorine, sediment, and some contaminants, RO systems go further—removing up to 99% of dissolved solids, heavy metals, fluoride, arsenic, and other microscopic impurities. With an RO system installed in your home or business, every glass of water is not only refreshing but also exceptionally safe for cooking, drinking, and even making coffee or tea.

How Reverse Osmosis Works

Reverse Osmosis uses a multi-stage filtration process that forces water through a semipermeable membrane. This process separates contaminants from the water at a molecular level, ensuring only clean water passes through. Most RO systems include multiple filters (sediment, carbon, and the RO membrane) to maximize performance.

The result? Crystal-clear, better-tasting water that rivals—or even surpasses—bottled water, right from your tap.

Benefits of a Reverse Osmosis System

Superior contaminant removal – Effectively reduces heavy metals, pesticides, nitrates, fluoride, arsenic, and more.
Improved taste & odor – Eliminates unpleasant smells and chemical aftertastes.
Healthier hydration & cooking – Enjoy safe, filtered water for drinking, making baby formula, and preparing meals.
Cost savings – Cut down on bottled water purchases with an endless supply of purified water at home.
Compact, point-of-use installation – Typically installed under the sink with a dedicated faucet for easy access.

      
 Excellent4.71735 reviews
 4.7
 Excellent1735 reviews
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   Danielle Stahler 
 23 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. This is our second huge projects with Castleworks. Justin went above & beyond, not only making what could have been  a huge issue. He figured out the best way to do do with a very minimal amount of holes in walls. He did the work quickly & despite the very small holes needed to connect the pipes, he made it all look like a work of art. I highly recommend recommend the company for any plumbing needs & a special shout out to Justin
  
 
     Posted on Google  
   
   alice engelmann 
 22 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Excellent technician, clean, professional and focused.
He provided customer education when all was done and answered all pre- work questions as well.
Represented your company well.
In
  
 
     Posted on Google  
   
   Bill Loper 
 20 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. I would rate my experience with Christopher Beauvoir's installation of a new water heater as a "5".   He was extremely professional and straight-forward about the entire process.  Explained teh issues with my old water heater, and installed the new one quickly and efficiently.  I would not hesitate to recommend Castle Works to my associates if and when they need that kind of service.  thanks again for solving my hot water issues!
  
 
     Posted on Google  
   
   Todd Cetti 
 17 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. CastleWorks does excellent work.  Christopher Beauvoir showed up on time, was very knowledgeable, and did an excellent job replacing our old water heater in the garage.  They use Bradford White water heaters which are really good.  Very happy with the job, thank you!
  
 
     Posted on Google  
   
   Timothy Fives 
 13 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. CastleWorks’ technician, Christopher Beauvoir, showed up on time and quickly diagnosed the problem with the Grundfos circulation pump on our tankless water heater. He also discovered several faulty valves that had deteriorated over the years. Christopher replaced the failing pump and valves and was on his way in short order.
  
 
     Posted on Google  
   
   Ferdinand Galvez 
 10 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Chris was very professional and kind. Hes very educated when it comes to his like of work! You should definitely do business with Chris Beauvoir!! 5/5 Stars easy!!
  
 
     Posted on Google  
   
   Girard Miller 
 9 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. We needed to replace our large 100 gal water heater (4.5 Ba house) and called Castleeworks when some slight leakage was visible in the drain pan.  Great same-day service by Salvador Vidales, who provided the price estimate, consulted with us on options, and got us an additional discount because we were replacing with the exact same brand that they usually install, so no new major piping was rquired other than the usual new connectors. Waived the delivery fee for the new unit which was in Pomona several hours away on high traffic congestion day.. Salvador was also the installer, very capable and workmanlike.  Had the whole worksite set up and old unit ready for removal when the delivery/installation guys arrived on the hottest day of the year. When the new alumuinum drain pan got dented in the installation on our raised pad which didn't look good, he pro-actively had the team pull the new unit back off and installed another replacement drain pan to make sure we were happy with the results.  After the delivery guys left when the unit was in place, he worked for several more hours finishing at 7 pm.  Showed good workmanship, gave us good advice.  We were very happy with Salvador and the company so far at this point.  Obviously the proof of the pudding will be in the new unit and our service contracts and warranties, but we're off to a very good start and would highly recommend based on this experience on Day One!
  
 
     Posted on Google  
   
   Koosha Mortazavi 
 5 September 2026
 
 
 Trustindex verifies that the original source of the review is Google. Justin was great very professional and explained in details. Their service is great but the company is pricey.
  
 
     Posted on Google  
   
   Terri Mason 
 29 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. I am more than satisfied with the service I received from Castleworks Home Services.  From taking my phone call after hours when I discovered that my water heater was broken and leaking, and scheduling an appointment for the very next day… to keeping me updated on the estimated arrival time of my technician including a text with his full name and photo ID was truly impressive.  But what was even more impressive is the actual service itself.  Justin, the technician, was extremely easy to work with.  He was knowledgeable, polite, explained everything, answered all of my questions, and completed all of the work in one visit.  I couldn’t ask for a better experience and highly recommend this company! 5 ⭐️⭐️⭐️⭐️⭐️
  
 
     Posted on Google  
   
   ginni ashen 
 21 August 2026
 
 
 Trustindex verifies that the original source of the review is Google. On time and very knowledgeable.

RO Systems vs. Other Drinking Water Filters

While faucet-mounted and under-sink carbon filters do a great job improving taste and reducing chlorine, only RO systems address dissolved solids and a wider range of contaminants. If your household is particularly concerned about fluoride, heavy metals, or other microscopic pollutants, Reverse Osmosis is the most effective solution available.

Professional RO Installation with CastleWorks

CastleWorks provides professional installation of top-quality RO systems to ensure peak performance and reliability. Our experts will help you choose the right system for your water quality needs, install it properly, and provide ongoing support if needed.

With a Reverse Osmosis system from CastleWorks, you can enjoy peace of mind knowing your family has access to safe, clean, and great-tasting drinking water every day.

Contact CastleWorks today to schedule your consultation and discover the difference an RO system can make in your home.

No Hot Water? No Problem. Call the Water Heater Professionals at Castleworks Today!

Find Your Location

(844) 818-8666

Book Now!

We Offer Financing For Any Budget

Our financing options will give you peace of mind while ensuring your home is running on the best equipment on the market.

Comfort, Efficiency & Savings. You can have it all!

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The CastleWorks story began in 1995 and grew from the collaboration of many dedicated local professionals committed to service. Our family of businesses includes: