Backflow Preventers

Backflow preventers are an essential part for cross-connection control, ensuring a clean supply of drinking water for the public and within the premises of businesses. An annual inspection is required to ensure their effectiveness. Nexus Fire & Safety provides new installation, inspections and repairs of all kinds of backflow preventers no matter the size.

Let us help you do your part for clean and safe drinking water.

What is Cross Connection Control?

Cross-connection control is accomplished with the use of backflow preventers. A cross connection is the connection of a clean water supply with a potential contamination source for the water supply. Most commercial buildings have backflow preventers at their water entry facility and depending on the business there could be several more backflow preventers throughout. Cross-connection control is important to ensure safe and clean drinking water for the public and a non-functioning backflow preventer may result in liability issues for the contaminating party, as a contaminated water supply could result in severe illnesses or even death.

Many municipalities have cross-connection control programs that require the annual testing of the backflow preventer and reporting of the findings. Should the backflow preventer be noted as deficient, repairs to the mechanism are required. Backflow preventers come in many types, shapes and sizes, but all require proper maintenance and care to ensure they are functioning as designed. Nexus Fire & Safety has several certified cross connection technicians on staff, allowing us to provide new backflow preventer installations, annual inspections and any repairs should they become necessary.

Backflow preventer testing with differential pressure gauge

Backflow Inspections

Our team consists of cross connection certified technicians, certified with the BCWWA and the ACS AWWA. These certifications allow our team to complete the necessary steps and reports for an annual inspection and certification of a backflow assembly. All of our reports are fully compliant with the associated jurisdiction and will be submitted automatically, to minimize the administrative burden on your team.


Backflow Repairs

Should a backflow preventer assembly fail its inspection, a repair may be required. Our certified technicians will check the assemblies and carefully replace any parts that are damaged or worn. As backflow preventers are mechanical devices, parts will fail over time due to wear and tear.
Our large iventory of backflow preventers and associated repair kits ensures that we can provide the necessary repairs in a timely fashion. Additionally, each assembly will be re-tested after its repair. The reports will be submitted to the water purveyor immediately after the repair, showing the passed assembly.
Backflow Preventer Located Outdoors

What is a backflow

And where does it come from?

Fluctuations in water pressure cause backflow

Pressure Fluctuations

Pressure in water systems can fluctuate. The most obvious example is a fire hydrant being utilized by the fire department. When a hydrants is opened, huge amounts of water are drawn through it. Since the hydrant is connected to the water main, as are the buildings around it, the hydrant will begin to draw water from these buildings, as well as the water main to service the sheer amount of water pressure required. This means that water that was already in a building, and has the potential to be contaminated, could be drawn back into the water main and wreak havoc. A backflow preventer will aid in averting a possible contamination by ensuring no water can flow backwards into the supply.

Cross Connected Plumbing Lines

Sometimes things can go wrong and plumbing is no exception to this rule. Cross connected plumbing lines can cause clean water to be contaminated with chemicals or disease-causing organisms. Hoses are the prime example of a potential contamination risk, as they offer the opportunity for a back siphon event, causing chemicals or other contaminants to flow back into the water supply and potentially spread throughout the building or even worse, the main water supply. Backflow preventers come in many shapes and sizes and are built to block the reverse flow of water and thus keeping the water clean and safe for human consumption

Plumbing water lines along brick wall
Backflow Preventers protect the water system from contaminated water

Contaminated Water

Sources of contaminated water can include irrigation systems, dishwashers, laundry machines, hoses, swimming pools, ice machines and systems that utilize chemicals for a process and are connected to a water supply. The contamination potential is classified by the level of hazard, which is split into three levels of minor, moderate and severe. Depending on the hazard level, the type of backflow preventer is chosen to ensure the assembly can protect the water supply to the necessary extent.

How likely is an incident?

Backflow incidents happen to this day despite all the programs and measures in place. A recent story, which can be found here, albeit relatively harmless, outlines the potential for backflow and if it would have been a harmful substance the results could have been devastating. Keeping a backflow preventer inspected and up to date is not only a necessary evil to keep the authorities happy, but also ensures you minimize your liability towards your employees health and even the public health and safety.

Emergency response vehicle

How we can help

backflow preventers ensure clean water

Backflow Preventer Service

Backflow preventers are a mechanical assembly and can fail. It is then important to have a team that can offer the right parts and expertise to repair these units quickly and efficiently. Not only do we keep a large stock of parts, but our technicians are certified to assist with repairs of all backflow preventers.

Backflow Preventer Inspections

Our team is certified to inspect and test backflow preventers as part of the cross connection control programs of the many municipalities that we service. Our technicians are certified by the BCWWA and the ACS AWWA.

Reporting and Compliance

In order to streamline the process, we automatically submit all necessary reports and documentation to the applicable municipality, ensuring compliance for you and your business.