Backflow Prevention in Denver | Denver Backflow Prevention Experts

Denver’s Backflow Prevention Specialists for 45 Years and Counting

If back pressure or siphonage interrupts water flow as it cascades down your drains, it can send the water back to its source: your plumbing fixtures. No homeowner in Colorado wants to deal with this, so a fully functioning backflow prevention device is essential.

At Cooper, we test and replace backflow prevention devices to ensure that pressure issues like this do not occur in your home.

Our plumbing services are second to none along Colorado’s Front Range, and all backflow services include a 1‑year labor warranty and a 100% Satisfaction Guarantee.

Call Cooper today for prompt scheduling, transparent pricing, and dependable workmanship!

Emergency Services

From highly-trained plumbers

100% Satisfaction

Proven by Our A+ BBB Rating Since 1990

Licensed and Certified Plumbers

As required by the CDPHE for backflow testing

Expires September 30, 2026

🍏 Back-to-School Plumbing Savings 🍏

Get your home ready for the school year ahead. From drain cleanings and water heaters to boiler service, our expert plumbers are here to help.

Save $100 for Every $1,000 Spent on Plumbing Services

Schedule with offer

$100 OFF applies to qualifying plumbing services and repairs totaling $1000 or more, including water heater service.

Offer must be presented at the time of booking and cannot be combined with other discounts, coupons, or promotions—no cash value. No substitutions or rain checks permitted.

Valid for residential services only. Additional terms and conditions may apply.

Offer expires September 30th.

Expires September 30, 2026

💚 Join Green Club 360 & Earn More 💚

Get your home ready for the seasons ahead while earning extra rewards.

New Green Club 360 Members: Receive $200 Cooper Cash toward any future HVAC, plumbing, or electrical repair or upgrade.

Already a Green Club 360 Member? Receive $400 Cooper Cash toward any future HVAC, plumbing, or electrical repair or upgrade.

Schedule with offer

Valid with any Back-to-School Promotion or by itself.

Disclaimer: No substitutions or rain checks are available.

This promotion must be applied at the time of booking. It cannot be combined with other coupons or offers and has no cash value.

Some restrictions may apply. Contact us with any questions or to schedule your FREE diagnostic.

Request Service Call (720) 605‑7270

Our backflow prevention service process

Schedule a diagnostic
Exposure to wastewater can pose serious health risks to your household. If you suspect a backflow issue, contact the Cooper Green Team right away. We're available 24/7! Call our expert plumbers at (720) 605-7270 or schedule a diagnostic online, and we'll follow up to arrange a convenient appointment for you.
We provide upfront pricing
After thoroughly inspecting your plumbing system, we'll offer the most cost-effective solution. This could be a repair of your current backflow device or a replacement, depending on the situation. We can also install brand-new backflow prevention devices or test/maintain them to ensure they're working properly.
We perform expert workmanship
With your approval of the quote, we'll begin working on your backflow repair, installation, or maintenance service. Our fast and efficient approach often allows us to complete the job in a single visit to your home, typically within an hour or two.
Share your feedback
Customer experiences and opinions are essential to us. After your backflow prevention service, we want to know your thoughts. If there's room for improvement, please share it with us. Our goal is your 100% satisfaction, without exceptions!

Why Choose Us

Cooper Heating and Cooling has served Denver homeowners and businesses with exceptional quality HVAC, plumbing, and electrical services for over four decades. Whether you need repairs, a replacement, or annual maintenance, trust our team to delight you with money-saving advice and high-quality workmanship. As of July 1st, 2024, Cooper sends only licensed and certified plumbers to handle our customer’s backflow testing needs. This is to comply with the passage of HB24-1344 of the Colorado Department of Public Health.

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"Great service at a reasonable price."

Tech did an annual checkup on our system. He was very knowledgeable and explained what he checked and the results. Friendly and professional. Cooper did the installation and we have them back for annual checkups, great service at a reasonable price.
—David D. | Colorado Homeowner

See more outstanding 5‑star reviews on Google

Backflow prevention cost factors:

Diagnostic fee

If you experience sulfur-like smells, discolored water, or slow-draining sinks, you might have a backflow issue, and resolving it fast is critical to your family's health. Reach out to the Cooper Green Team, and we'll identify the problem fast. We charge a $119 diagnostic fee for our time and labor during regular hours. For assistance after 4 PM on weekdays, the fee increases to $219, and on holidays, it's $328.

New installation

If your home lacks backflow prevention, we can install a backflow prevention device to prevent potentially harmful wastewater from contaminating your property. Additionally, we can set up check valves that detect sudden pressure changes, alerting you to issues immediately.

Repairs and maintenance

Backflow preventers, like other appliances and systems in your home, need regular maintenance and repairs. Costs will vary based on the specific problem, but you can trust us to provide transparent pricing and recommendations tailored to your best interests.

Need emergency backflow support?

The fastest way to reach us is by giving us a call. We're open 24/7 throughout Colorado's Front Range. We'll send a qualified plumber to inspect your backflow prevention device and get an efficient solution in place ASAP!

Schedule Service