Backflow System Inspection & Testing in Detroit & Southeast Michigan
We need clean, potable water to live and work. Turning on the tap and getting drinking water is a simple process, but the science behind it is complex.
Backflow Systems: How They Work
Clean water flows in one direction: into our buildings’ plumbing fixtures and appliances. The resulting wastewater also flows in one direction: away from the property.
If there’s a water pressure issue or some other kind of problem, wastewater and even toxic gases can be forced back into your potable water supply. That’s why we install backflow systems. A backflow preventer stops the backflow of contaminated water into our drinking water.
Types of Backflow Preventers
The type of backflow preventer device installed in your building’s plumbing depends on:
- Degree of hazard posed by cross-connection
- Pipe size(s)
- Plumbing system arrangement
- Property location
Common types of backflow (and backsiphonage) preventer systems include:
- AVB – The atmospheric vacuum breaker backflow preventer is sometimes called a “non-pressure-type vacuum breaker.” It is elbow-shaped and has a check seat, an air inlet port, and an inlet valve inside to prevent backflow. A backward water flow causes the air inlet valve to close. When the water flow stops, the valve drops and forms a “check valve” against backflow while allowing air to enter, which satisfies the vacuum.
- DCDA – Double check detector assembly backflow preventers are usually used with fire sprinkler systems. The design includes a double check valve with a metered bypass. It can also detect water loss due to leaks.
- DCV – Double check valves have two check valves: one tightly closing shut-off valve at each end, plus seated test cocks to allow normal flow.
- PVB – A pressure vacuum breaker protects against backsiphonage. It has an independent check valve and air inlet valve. It should be equipped with seated test cocks and shut-off valves at each end.
- RPZ – A reduced pressure zone device is used in especially hazardous situations. It maintains a lower pressure than the water supply pressure to prevent backflow and toxic contamination.
- SPV – a spill-resistant vacuum breaker has an internal check valve and an independent air inlet valve. It’s used to protect against backsiphonage.
Backflow Preventer System Inspection: What We Do
Even if it’s a small leak, backflow is a big problem and can cause serious health hazards. Most companies and homeowners treat a backflow occurrence as a health crisis because it is.
Backflow preventers are necessary to safeguard a water supply, but they must be tested and inspected by a Michigan-licensed, trained plumbing professional for maximum efficiency.
Fire Systems of Michigan will:
- Turn off the downstream shut-off valve.
- Attach test hoses.
- Test the water pressure.
- Examine areas where the pressure isn’t correct.
Fire Systems of Michigan: Safety Is Our Focus
Our professionals are knowledgeable about regulations and compliance, which is important. But we also care about the health and safety of our Michigan neighbors. Call 313-255-0053 or contact Fire Systems of Michigan for commercial or residential backflow preventer systems testing and inspection information or services.