Backflow Prevention & Testing | Althoff Home Services

Backflow is a serious plumbing issue that can allow contaminated water to enter your home’s clean water supply. At Althoff Home Services, we provide expert backflow prevention testing, repair, and installation services to protect your home and your health. Serving Crystal Lake and the surrounding Chicago suburbs, our licensed plumbers ensure your backflow prevention devices are functioning properly and meet local code requirements.

Family owned since 1961
We provide quotes before performing service
100% satisfaction guarantee

Whether you need a routine test, urgent repair, or a new backflow device installed, we have the tools and expertise to get the job done right. Let Althoff Home Services help you safeguard your home’s water supply with reliable, professional backflow prevention service. Contact us today to schedule an inspection or consultation.

Proudly serving the Crystal Lake area for over 60 years!

The Vital Purpose of Backflow Prevention Devices

Backflow occurs when contaminated water flows in the wrong direction, re-entering your home’s clean water supply from the sewer, irrigation system, or other external sources. This can happen during sudden pressure changes in your plumbing system and may introduce harmful bacteria, chemicals, or debris into your drinking water. That’s why backflow prevention devices are so important, they act as a one-way gate, ensuring water only flows into your home, never out and back in.

At Althoff Home Services, we install, test, and repair backflow preventers to keep your home’s water supply safe and up to code. We’ve been protecting homes in Crystal Lake and the surrounding suburbs for decades with proven expertise and trustworthy service. Whether you’re required to install a device or want to take proactive safety measures, our team ensures your system is secure and compliant.

Not All Homes Have Backflow Preventers. Does Yours?

Not every home is equipped with a backflow prevention device, and depending on your plumbing layout, you may be more at risk than you realize. Homes with irrigation systems, private wells, or pressure-based systems are especially susceptible to backflow. If you’re unsure whether your home is protected, Althoff Home Services can perform a simple inspection to find out.

We evaluate your home’s plumbing connections and water usage points to determine if a backflow device is present, functioning, and located where it should be. If installation is needed, we’ll guide you through your options and install the appropriate type of backflow preventer for your system. We always provide quotes before performing service, so you can make informed decisions. With our 100% satisfaction guarantee, you can trust that your water quality is in good hands.

Contact Us for Backflow Prevention Testing and Other Services

Backflow prevention isn’t just about having the right equipment, it’s also about ongoing testing and maintenance. Many municipalities require annual backflow testing to ensure compliance and safety. At Althoff Home Services, we perform certified testing, issue required documentation, and provide fast repairs if any issues are found. If your device fails, we’ll fix it or recommend a replacement, keeping your water supply protected year-round.

We offer 24-hour emergency service in case of suspected backflow or urgent plumbing concerns. Our licensed plumbers are experienced, reliable, and fully trained in backflow system installation and diagnostics. Contact Althoff Home Services today to schedule backflow prevention testing, installation, or repair. Protecting your family’s water is our top priority.

What Are Other Homeowners Saying?

Excellent

Althoff Home Services4.8

Based on 1092 reviews

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Lyn Cablk

2 weeks ago

Altoff's service is always excellent. We've never been disappointed and our history with them goes back 28 years, ever since we moved to this community!

tiffany foreman

Mark was friendly, professional and thorough. He did a great job fixing and cleaning my AC unit. He took time to look everything over and made recommendations for services in the future. I appreciated his advice and attention to detail. I would definitely recommend him!

John Cadwell

AC tune-up - very thorough.

Ouzelfalls

I recently switched to Altoff Services to do my annual A/C and Heater maintenance. They came this week to do the A/C. they did a thorough job in testing my A/C's cooling efficiency. they tested refrigerant levels.They removed the outside unit's shroud and thoroughly cleaned the unit. This was the first time anyone did that. I was very happy with the work they did.

Lois

I was out of the state when my son texted about the water leak in the basement. Althoff responded promptly and resolved the issue. So happy with the service they provide!

Laura Frayn

3 weeks ago

My A/C stopped working due to an unusual problem. Edwin used excellent analytical skills to find the solution. He was professional, thorough, and an excellent communicator. I highly recommend Edwin and Althoff

Greg Vachon

We had new a/c compressor and attic fan unit installed in the spring. Team was efficient and did a great job. Completed just as stated. Electricity bill went from above average for neighbors to below average according to ComEd report. It has been a lot of savings (plus house is cool - old one wasn't working well). Technicians have been wonderful in ensuring working just right (Ryan Staral, thanks! ... Brian Pulaski, thanks!). The staff calling us for our maintenance check (free with install) were so polite and accommodating. Really stellar service!

Mark Palmer

Jon at Althoff was a lifesaver. Had a leak that several other companies were unable to fix. Jon had a great attitude and resolved my problem quickly. I will be using Althoff in the future.

Bob Rozycki

Yesterday we had our furnace, air conditioning unit, air filter system and whole house humidifier replaced. Alex Florita and Wiktor Kruzel were the two technicians who removed the old equipment and installed the new products. To say the installation was flawless, incredibly clean and perfectly done would be a gross understatement. These craftsmen did a fantastic job, were very careful in our home and answered all of our questions completely. We , as usual with Althoff, were totally satisfied. Today, Jesse Hernandez from Althoff came to us to replace our water heater. He was incredible. He was friendly, professional, and went way beyond my expectations. He answered every one of our questions, provided us with advice on how to best use the equipment and did an outstanding installation of our new tankless water heater. We have been customers of Althoff Home Services for over thirty years Over that time we have worked with many technicians and staff members to address our needs. I can say, without reservation, that all of these people met or exceeded our expectations. Jesse, Alex and Wiktor FAR exceeded those expectations. Jesse is an incredible technician. And what a truly nice person. Totally outstanding in every way. Bob and Sharon Rozycki

Mark Paszkiet

HVAC check-up

Jackie Dugger

Erik was quick, kind, and clean. Excellent service as part of my regular AC maintenance plan.

Virgil Marsmaker III

4 weeks ago

Althoff just finished the second job at our home this year. They do everything at the highest possible level. Great workmanship with great attitudes. Would recommend!!

Janet

1 month ago

Brian was our tech at my dad's place. He did an HVAC checkup. My 99 yr old dad wanted to go to the basement with Brian so she could see what Brian recommended. He took the time to explain everything to dad, which I thought was so nice, given the fact it took dad awhile to get down the stairs! Great service.

Randy Malin

2 months ago

Jim our tech was amazing Explained everything so we understood everything he was doing Very professional and knowledgeable! Thank you Jim

Jim Marks

Very good explanation of what needs more immediate attention if anything, or what could wait.

Becki Parsons

Todd was very nice and knew what he was talking about. Suggested things we can do. He was very pleasant to talk to and we would love to request him every time we to service our home. 5 stars and more!!!!

Steve S.

Would highly recommend Althoff for your electrical needs. Our tech. Scott was friendly, efficient and professional. He explained exactly what he was doing and the need for safety repairs to our electrical panel. Great job!!

Susan Richardson

I had a very nice young man for my technician. He checked and cleaned everything and told me all was well. Of course that made me happy. The technician was here to clean and check my heating system for the winter

Fred Ichinose

Super responsive, communicative, informative, friendly, competitive and got the job done well. Highly recommended.

3 months ago

We are so pleased with the work Victor and Braden did-- professional, friendly, fast, and with great explanations. We could not be happier with their work, as we always are with your company's work. The Daikin unit is working perfectly, keeping our open concept kitchen, family room, music room, and dining room a uniform, warm temperature. THANKS!!!