✓ CO Utility-Approved Tester Verified ★ 5 (21 reviews) On Colorado Springs Utilities list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Approved backflow testers in Denver, CO
34 backflow testing businesses work within 25 miles of Denver, 8 of them based in town. Every one is on the approved tester list of 6 water utilities.
34 businesses within 25 miles
Backflow testing companies near Denver
What the badges mean
- ✓ CO Utility-Approved Tester Verified On the city list
- The company is on a water utility's own approved list (the second badge names the list). That is the utility's approval, not a state license, and it counts for that utility.
- 3 certified testers
- How many certified testers the roster lists at this business.
- ★ 4.8 (25 reviews)
- The Google rating, shown as Google reports it. It does not change the order.
Order is by our quality score, never by payment. How we verify listings.
Are you a backflow testing company near Denver? One sponsor per county, clearly labelled. Sponsor this county
Foster Plumbing
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.3 (49 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Redline Fire Solutions
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.3 (6 reviews) On Colorado Springs Utilities listOn City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
✓ CO Utility-Approved Tester Verified ★ 4.1 (13 reviews) On Colorado Springs Utilities list Backflow Testing
Verified Oct 2026 · Unclaimed listing
American Sprinkler Inc
90/100 ✓ CO Utility-Approved Tester Verified ★ 3.3 (3 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Colorado Alarm LLC
90/100 ✓ CO Utility-Approved Tester Verified On Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Frontier Fire
90/100 ✓ CO Utility-Approved Tester Verified ★ 4 (62 reviews) On Eagle River Water & Sanitation listOn City of Longmont listOn City of Aspen list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Vectra Mechanical
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.9 (375 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Backflow Tech
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.3 (19 reviews) On Cherokee Metro District listOn City of Longmont listOn Town of Berthoud listOn City of Aspen list Backflow Testing
Verified Oct 2026 · Unclaimed listing
H2O Fire Protection, Inc
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.6 (20 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Victory Fire Protection
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.2 (5 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Platinum Fire Protection Inc
90/100 ✓ CO Utility-Approved Tester Verified On Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Braconier
90/100 ✓ CO Utility-Approved Tester Verified ★ 3.4 (38 reviews) On Colorado Springs Utilities list Backflow Testing
Verified Oct 2026 · Unclaimed listing
✓ CO Utility-Approved Tester Verified On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
✓ CO Utility-Approved Tester Verified ★ 4.7 (416 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
✓ CO Utility-Approved Tester Verified ★ 4.7 (22 reviews) On Eagle River Water & Sanitation listOn Colorado Springs Utilities listOn City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
✓ CO Utility-Approved Tester Verified ★ 4.2 (5 reviews) On City of Longmont listOn City of Aspen list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Vulcan Fire & Security
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.1 (27 reviews) On Eagle River Water & Sanitation listOn Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Advanced Backflow LLC
80/100 ✓ CO Utility-Approved Tester Verified On Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Control Systems Inc
90/100 ✓ CO Utility-Approved Tester Verified ★ 3.9 (9 reviews) On Eagle River Water & Sanitation list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Cintas Fire Protection
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.6 (171 reviews) On Eagle River Water & Sanitation listOn City of Longmont listOn Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Red Rocks Fire Protection
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.5 (8 reviews) On Colorado Springs Utilities list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Convergint
90/100 ✓ CO Utility-Approved Tester Verified ★ 4 (29 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Mtech Mechanical
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.3 (81 reviews) On City of Longmont listOn Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Murphy Company
90/100 ✓ CO Utility-Approved Tester Verified ★ 3.8 (52 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Meridian Fire & Security
90/100 ✓ CO Utility-Approved Tester Verified ★ 2.8 (4 reviews) On Eagle River Water & Sanitation listOn Colorado Springs Utilities listOn City of Longmont listOn Town of Berthoud listOn City of Aspen list Backflow Testing
Verified Oct 2026 · Unclaimed listing
✓ CO Utility-Approved Tester Verified ★ 3.2 (74 reviews) On City of Longmont listOn Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Procraft Mechanical
90/100 ✓ CO Utility-Approved Tester Verified ★ 3.5 (25 reviews) On City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Thompson Safety
90/100 ✓ CO Utility-Approved Tester Verified ★ 4.9 (67 reviews) On Eagle River Water & Sanitation listOn City of Longmont list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Cosco Fire Protection
90/100 ✓ CO Utility-Approved Tester Verified On City of Longmont listOn Town of Berthoud list Backflow Testing
Verified Oct 2026 · Unclaimed listing
Price reports
What a backflow test costs in Denver
Not enough reports yet for Denver to show a range. Be one of the first: it takes a minute and stays anonymous.
Published prices nationwide
$29.99 to $100 per assembly
$0$25$50$75$100$125
Every published price, with its source: what a backflow test costs.
Failed test? Published repair, rebuild and replacement prices: what a backflow repair or replacement costs.
Metro guide: Backflow testing in Denver: every utility's rules, filing portals and published prices in one place.
Denver Water: backflow test rules
- Who must test. All commercial, industrial, domestic, irrigation and fire line services must have an approved backflow prevention assembly; single and multi-family homes are assessed by site hazard. Source.
- Notices and deadlines. Denver Water sends a testing reminder notice 30 days before the annual test is due; the irrigation testing season runs May to September. Source.
- How the report is filed. All test reports must be sent by email to crossconnectioncontrol@denverwater.org on the Denver Water test and maintenance report form. Source.
- Tester registration. Domestic and irrigation assemblies may be tested by a certified tester with ABPA or ASSE certification; fire assemblies also need State of Colorado Fire Suppression System Contractor-Backflow certification. Source.
- If a test is missed. A $250 penalty is charged after three mailed notices go unanswered and the service goes into suspension status; it is not refunded. Source.
Never miss your annual backflow test
Most water utilities require the backflow assembly on an irrigation, fire or commercial line to be tested every year, and a missed test can mean a shutoff notice. Tell us when yours was last tested in Denver and we'll text you a month before it is due, with certified local testers ready to book.
Free. One text before your test is due. No spam, cancel anytime. Privacy
Backflow testing questions in Denver
Where are the backflow testing businesses listed for Denver based?
34 backflow testing businesses are listed within 25 miles of Denver. 8 are based in Denver itself, 22 more within 15 miles and 4 further out, up to 20 miles away. Other towns with more than one listing: Lakewood (4), Westminster (4) and Englewood (3). The closest is Bluejay Maintenance & Construction Services LLC, under 1 mile from Denver.
Which tester lists are the businesses near Denver on?
Every one is on the approved tester list of 6 water utilities.
Which water utility sets the backflow test rules in Denver?
Denver Water. Who must test: All commercial, industrial, domestic, irrigation and fire line services must have an approved backflow prevention assembly; single and multi-family homes are assessed by site hazard.
How many of the backflow testing businesses near Denver have Google reviews?
29 of the 34 listed for Denver have 3 or more Google reviews. Mountain Alarm Fire & Security has the most reviews, 416, with an average of 4.7 stars, as Google showed them at our last check.
Approved list: City of Longmont backflow tester contact list, City of Longmont Water.
Approved list: Colorado Springs Utilities registered backflow testers, Colorado Springs Utilities.
Approved list: Eagle River Water & Sanitation District certified backflow test company directory, Eagle River Water & Sanitation District.
Approved list: Town of Berthoud backflow inspection and testing companies (tested in 80513), Town of Berthoud.
Approved list: City of Aspen certified backflow tester list, City of Aspen Utilities.
Approved list: Cherokee Metropolitan District backflow tester list, Cherokee Metropolitan District.
Approved list: City of Grand Junction certified backflow tester list, City of Grand Junction Water Services.
Approved list: Security WSD approved list of certified backflow testers, Security Water and Sanitation Districts.
Approved list: City of Durango licensed and certified cross connection control testers, City of Durango Cross Connection Control Program.
Keep looking
- Lakewood, CO(6 mi)
- Golden, CO(11 mi)
- Westminster, CO(12 mi)
- Centennial, CO(12 mi)
- Thornton, CO(13 mi)
- Aurora, CO(13 mi)
- Englewood, CO(14 mi)
- Longmont, CO(29 mi)
- Berthoud, CO(41 mi)
- Loveland, CO(49 mi)