Basics of Backflow Prevention
Backflow prevention is essential for maintaining water quality and safety.
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Cross connections, points where the potable water supply interacts with potential contaminants, pose a risk of backflow.
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The basic principles of cross connection control are very simple, yet there are thousands of variables that enter the formula in designing and engineering backflow prevention into any potable water system.
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Here's a brief overview of the ABC's of Cross Connection Control:
Understanding the A B C's of
Cross Connection Control
A: Awareness of Cross Connections
Identifying potential cross connections is the first step in preventing backflow.
These can include:
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Irrigation systems
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Fire sprinkler systems
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Pools and hot tubs
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Connections where chemicals are introduced
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As well as other connections that may compromise the water supply.
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The hydraulic conditions of backpressure and backsiphonage can only cause a problem if there is a passageway from the unwanted material and the drinking water. This passageway is called a cross connection. There are two types of cross connections that can be created: either an actual (direct) or potential (indirect) connection.
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An example of an actual connection would be the feed line from the potable water supply connected to the boiler feed. An example of a potential connection would be a janitorial sink faucet with a hose thread outlet. This has the potential of connecting an open-end hose into the sink of soapy water or dangerous chemicals.
B: Backflow Prevention Devices
Installing backflow prevention devices is essential for protecting water systems. Key devices include:
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Reduced Pressure Principle (RP) Valves
Double-Check Valve Assemblies (DCVA)
These devices prevent the reverse flow of water and contaminants into the main water supply.
C: Compliance and Testing
Regular testing and compliance with local regulations are crucial.
Routine inspections ensure that backflow prevention devices are functioning correctly. Compliance with local ordinances guarantees the safety of your water supply AND prevents potential legal issues. Please review your municipality’s Cross Connection Control Bylaw for specifics (RMOW, Pemberton, Squamish).
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1. Regular Testing Frequency:
Backflow prevention devices should be tested annually to ensure they are in proper working order and effectively protecting the drinking water supply.
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2. Certified Testing Professionals:
Testing must be performed by certified professionals. Sea to Sky Backflow Assembly Testing offers certified and reliable testing services.
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3. Documentation and Record-Keeping:
Local authorities will request accurate records to verify that backflow prevention measures are being consistently implemented.
Understanding and applying these principles of cross connection control, with a focus on compliance and testing, is fundamental for ensuring the safety and purity of the water systems in our local communities.
As a dedicated provider of backflow prevention testing services, Sea to Sky Backflow Assembly Testing is committed to helping you maintain water quality with professional and reliable services.
