Our HALO Ultra Plus system eliminates a wide range of contaminants, including chlorine, pesticides, and heavy metals.


Trust A Custom Services to elevate your water quality.


Our purification process prevents harmful buildup on appliances and surfaces.


Feel safe drinking Chicago’s municipal water with our whole-house water purification systems.


Investing in our whole-house water purification system offers the ultimate peace of mind, knowing that every drop of water in your home is clean, safe, and free from harmful contaminants.

There’s nothing more important than the purity of water in your Chicago home.

Due to the city’s urban environment, tap water quality is of top concern. That’s why A Custom Services offers comprehensive house water purification in Chicago, utilizing advanced systems designed to deliver clean, safe water throughout your entire home. As a locally owned and operated company since 1993, we proudly serve the Chicagoland area. To learn more, contact our office today.

Why Choose Whole House Water Purification?

As a homeowner, you want to prioritize the health, comfort, and safety of your family. There’s no better way to do that than by choosing a whole-house water purification system in Chicago. 

Since 1993, Chicago residents have trusted A Custom Services’ advanced house water purification solutions.

Health and Safety

The HALO Ultra Plus system is a Reverse Osmosis Purification System With Alkalinity Booster, removes many contaminants. From chlorine and sodium hypochlorite to environmental pollutants like DPCBs and common pesticides, our systems are results-driven. That’s the A Custom Services promise. 

Efficiency and Comfort

Installing a whole-house water filter means every water source in your home, from the kitchen faucet to the showerhead, delivers purified water. This improves the taste and smell of your drinking water and enhances the quality of water for cooking and bathing. At A Custom Services, we guarantee results. 

Peace of Mind

Investing in a whole-house water purification system offers peace of mind. You can rest easy knowing you are protecting your family and keeping them safe from water-borne issues. The HALO systems are customized to Chicago’s unique water supply through our decades of knowledge serving the region.

ION Conditioning: Your Solution to Hard Water

ION (6 or 9) technology in our whole house water purification offerings marks a significant advancement in treating hard water. Specifically designed to dissolve existing scale and inhibit the formation of new scale, the ION conditioners represent the latest technology. 

By physically treating the water without the need for chemicals or salt, the ION conditioners inhibit corrosion throughout your home’s water system. This extends the lifespan and optimizes the performance of your home’s piping, plumbing fixtures, hot water heaters, washing machines, dishwashers, and more.

Nobody wants heavy metals or scale buildup in their home. That’s why the technology behind A Custom Services’ water purification systems targets and removes contaminants while conditioning the water to prevent scale formation. Regular checks performed by our Chicagoland-based team keep your system running smoothly.


To help you better understand the benefits of our whole house water purification in Chicago, we’ve compiled a list of frequently asked questions. You can trust our expertise because we have served the region since 1993. 

Can the system remove lead and other heavy metals from my water?

Absolutely. Our HALO Ultra Plus reverse osmosis system significantly reduces or eliminates lead, heavy metals, and other contaminants. Our advanced filtration technology and Reverse Osmosis target and remove these harmful substances. We know that you prioritize your family’s safety, and it’s our mission to help you do just that.

Will I notice a change in water taste or odor after installation?

Yes. A Custom Services takes pride in providing services you can depend on. One of the immediate benefits of installing a whole house water purification system is the noticeable improvement in your water’s taste and smell. By removing contaminants and chlorine, which are often responsible for unpleasant odors and tastes, our system enhances the overall quality of your water. Your family will love its taste!

Is it necessary to replace filters, and how often?

It depends on the filtration system. The Halo ultra plus RO whole-house water purification in Chicago requires periodic filter replacements to ensure optimal performance. Generally, filters should be changed every 12-18 months. Alternatively, the whole house water purification system ( H2zero Ultimate) is maintenance free for 10 years. The filter is good for 10 years or 1,000,000 gallons. If it stops working before 10 years, Halo will send a carbon replacement. At A Custom Services, our local Chicagoland-based technicians provide a customized maintenance schedule for your needs.

How does the system affect water pressure in my home?

Our whole house water purification systems don’t impact your home’s water pressure. While slight variations in pressure can occur immediately following installation as the system adjusts, these changes are typically negligible and temporary. A Custom Services professionals believe every property should have the most efficient, effective, and reliable house water purification in Chicago.

Right HALO Solution

Since 1993, A Custom Services has been dedicated to enhancing your health and comfort with our house water purification in Chicago. By examining your water with tools like the EWG tap water database, you can see the direct benefits our systems can offer. It’s our honor to help you take the next step toward a healthier home environment. Contact A Custom Services today to learn more.

Jay Mahlendorf
Jay Mahlendorf
Working with A Custom Services Inc, including the engineer Steve S. and Michael in their business office, was all positive and I will happily work with them again. They understood, made helpful recommendations, communicated proactively, and they followed through as they said they would. It was a stress free experience and good value for the work.
Wendy Campnell
Wendy Campnell
Steve went above and beyond answering my questions and explaining how things worked. I really appreciated his expertise and patience.
Bill Harris
Bill Harris
Alfredo and Tom replaced our furnace and did a Fantastic Job. They were professional, courteous and very informative. They were considerate of the delivery, prepping the area to keep it clean and worked efficiently and very quickly. Alfredo is a master HVAC professional and did a great job! Tom was fantastic on the installation as well as keeping my wife and I informed of the new aspects of the furnace and thermostat. Previous to the replacement Steve responded very quickly for the no heat call and was very professional to diagnose the problem and provide multiple solutions. Steve did an excellent job with the solution write up, planning for the hardware readiness and ensured that our project was completed the next day. Michael in the main office performed all the managerial interaction very well, answered all our questions and took care of the paperwork and invoicing in a very professional manner. Highest grades for this team and I will recommend them to all our friends.
Shauna Daou
Shauna Daou
A Custom Service was amazing throughout our experience with them. When I contacted them, Michael called me back promptly and helped me in scheduling an appointment. He also called a day before the appointment as a friendly reminder and to confirm that the appointment still worked for us. Alfredo was the technician who came to our house. He was on time and walked us through everything he was checking. He also answered all of our questions and even answered some questions my neighbor had about his system! He was very thorough, knowledgeable, and professional. After the service, Michael reached out again to make sure everything worked well. We used A Custom Service to do routine maintenance on our radiant heating system, and moving forward we will be using them to address all of our HVAC needs! Job well done.
Alvaro Santana
Alvaro Santana
Contacted A Custom Service to get some work done on my boiler. Response was quick, Michael was able to help me set an appointment up and was very attentive to our communications. Alfredo, our technician, was knowledgeable with boiler systems and was able to answer my questions. Found out that a circulation pump needed to be changed and he had the part in his truck so there was no delay in getting us up and running. A Custom Services will be our go to heating service from now on.
Brennan Williams
Brennan Williams
Great crew all around, owners, office, technicians. What I most appreciate is that everyone I dealt with was polite and professional. Secondly, they are trying to solve your HVAC issues, not charge you for things you don’t need. Highly recommend.
Natalie Rodriguez
Natalie Rodriguez
Always thorough and honest.
Tim Oryhon
Tim Oryhon
Michael was very responsive with initially setting up the service technician appointment. Alfredo was very helpful and a wealth of information. Our experience with everyone at A Custom was superb.