Backflow-prevention Test
Backflow-prevention Test | Commercial Plumbing | Plumbing | Blaine
When a Blaine restaurant, warehouse, or office tower needs its water lines secured against contamination, locals turn to HEP’s certified backflow-prevention team. Our technicians arrive on schedule, test every assembly with precision gauges, and file the paperwork the city requires—usually before your customers or employees even notice we were there. The result is clean, code-compliant water and the peace of mind that comes from knowing your business is protected 24/7.
HEP pairs this meticulous testing with decades of hands-on experience in commercial plumbing, so we understand how to keep downtime to a minimum and systems running smoothly. From annual inspections to emergency repairs, one call links you to transparent pricing, same-day reports, and the friendliest pros in Blaine’s plumbing scene.
FAQs
What is backflow and why is a prevention test required for commercial properties in Blaine?
Backflow is the unwanted reversal of water flow that can draw contaminants from your building’s plumbing back into the public water supply. Because commercial facilities often use chemicals, industrial cleaners, and specialized equipment, the risk to Blaine’s municipal system is higher than with residential properties. State of Minnesota plumbing code (MN Rules Chapter 4714) and the City of Blaine both mandate annual testing of all commercial backflow-prevention assemblies to verify they are operating correctly and protecting public health.
How often does the City of Blaine require backflow-prevention devices to be tested?
Under Blaine’s cross-connection control program and Minnesota Department of Health guidelines, every testable backflow-prevention assembly in a commercial building must be inspected and certified at least once every 12 months. High-hazard devices (those protecting boilers, chemical dispensers, irrigation systems, etc.) may also require retesting after repair, relocation, or any plumbing modification. The annual test results must be submitted to the city’s backflow tracking portal within 30 days of the inspection date.
What types of commercial plumbing systems typically need backflow protection in Blaine?
Common commercial applications that must be isolated with approved backflow assemblies include: • Fire-sprinkler systems with chemical additives • Commercial boilers and hydronic heating loops • Lawn-irrigation systems and hose bib manifolds • Carbonated beverage dispensers and kitchen chemical feeders • Cooling towers and process-water lines • Medical, dental, or laboratory equipment connected to potable water. A licensed tester can review your site plans and confirm exactly which cross-connections require protection and annual testing.
What happens during a professional backflow-prevention test?
A certified tester will: 1) Shut off downstream valves to isolate the assembly; 2) Connect a calibrated differential gauge to the test cocks; 3) Measure check-valve closure pressure and relief-valve opening points (for RPZs) or verify check-valve tightness (for DCVAs); 4) Record all readings on Blaine’s approved test form; and 5) Restore the assembly to service, ensuring no water hammer or system disruption. The entire procedure typically takes 20–45 minutes per device, depending on size and location.
What qualifications should my backflow tester have in Minnesota?
In Minnesota, backflow testing must be performed by an individual who holds both: (1) A Minnesota Department of Labor & Industry (DLI) Plumbing License or a restricted backflow testing license, and (2) A current ASSE 5110 (or equivalent) Tester Certification. Reputable commercial plumbers will also carry general liability insurance and be registered with the City of Blaine’s cross-connection control program so they can file test results electronically on your behalf.
What if my backflow device fails the test, and how can it be fixed?
If any check valve, relief valve, or shut-off valve does not meet performance criteria, the assembly is considered failed. Blaine ordinance requires that you repair or replace the device within 10 business days. A licensed plumber will clean debris, replace worn springs, seats, or rubber parts, and then retest the assembly. After a successful retest, the new passing report must be sent to the city to close the violation and keep your facility in compliance.