Sean Cleary
Why Consistency, Science, and Public Health Must Drive the Answer
There are few topics in the water industry that generate as much agreement — and yet as much debate — as backflow prevention assembly testing.
Most professionals agree on the basics:
So far, so good.
The real disagreement begins with a deceptively simple question:
Which assemblies should be tested? What the Codes and Standards Actually Say
Model plumbing codes and cross-connection control standards are clear:
All testable backflow prevention assemblies must be tested.
This applies to assemblies installed for:
If a hazard exists that requires a testable backflow prevention assembly, logic and public-health principles dictate that the assembly must also be tested and maintained.
Anything less undermines the very reason the assembly was required in the first place.
If Protection Is Necessary, Testing Is Necessary
This is the point where resistance often appears — particularly when residential properties enter the discussion.
Yes, it can be difficult to explain backflow prevention to homeowners. Yes, cost is always part of the conversation.
But the physics of water flow do not change based on property type.
Water does not know what the zoning classification is
Water is a lazy fluid — it follows the path of least resistance. That principle applies everywhere.
Residential vs. Commercial: A False Divide
One of the most persistent myths in cross-connection control is that residential systems are somehow less risky by default.
In reality, modern residential properties commonly include:
From a backflow perspective, many residential hazards mirror commercial hazards exactly.
An irrigation system is an irrigation system — regardless of whether it serves a home or a shopping center.
The “Grandfathering” Problem
Few concepts create more confusion — and more risk — than grandfathering safety requirements.
Consider two identical buildings on the same street:
If the water main loses pressure, does the age of the building prevent backflow?
Of course not.
You can grandfather:
But you cannot grandfather physics — and you should not grandfather public-health protection.
Lowering the level of protection because a system is “older” does not reduce the hazard. It simply accepts greater risk.
When Policy Discussions Lose the Plot
Public meetings on backflow ordinances often reveal the same pattern:
Well-intentioned officials may look for compromise solutions, but compromise cannot come at the expense of drinking water safety.
The most dangerous outcome is an all-or-nothing mindset, where:
Neither approach is effective.
The correct approach is evaluation, education, and targeted protection.
Education Is the Missing Piece
Most resistance to testing requirements does not come from malice — it comes from lack of understanding.
Effective cross-connection control programs rely on:
Some properties may not require testable protection.
Some absolutely do.
But those decisions must be based on actual water use and hazard evaluation, not assumptions or political pressure.
The Role of the Industry in 2026
In 2026, the responsibility extends beyond regulators and utilities.
Installers, testers, inspectors, educators, and manufacturers all play a role in:
Cross-connection control is not about creating work — it is about preventing contamination before it happens.
The Bottom Line
If a backflow prevention assembly is:
Then it must be:
Anything else is inconsistent, indefensible, and unsafe.
Protecting drinking water requires consistency, education, and the courage to apply science evenly — whether the pipe serves a factory, a school, or a single-family home.
That is the work we do.
And it matters.
Backflow Prevention Installation Mistakes That Still Persist in 2026. After traveling across the United States conducting cross-connection control training, performing surveys, and answering questions about problematic backflow prevention installations, one issue remains surprisingly common: failure to follow the adopted plumbing code.
More than a decade after lead contamination in drinking water became a national headline, one uncomfortable truth remains clear in 2026: Lead in drinking water is still a serious public health problem.
A clear answer every property owner deserves. One of the most common and most important questions asked by business owners and property managers is: “Why do I need to have backflow prevention installed, tested, and maintained in my facility?”