What is required when using a hose-end proportioner between the proportioner and water supply?

What is required when using a hose-end proportioner between the proportioner and water supply?

• A. A fail-safe backflow prevention device
• B. No restrictions; drift control only
• C. A filter to remove solids
• D. UV disinfection

Answer: (A)

When using a hose-end proportioner, protecting the water supply from contamination is essential. A fail-safe backflow prevention device is required between the proportioner and the water source because pressure changes or siphoning can cause the pesticide solution to flow back into the drinking water line. This device acts as a barrier to prevent any contaminated water from entering the supply, safeguarding people and the water system. The other options don’t address this risk: drift control relates to where droplets land, not backflow; a filter tackles solids but doesn’t stop backflow; UV disinfection isn’t a standard requirement for this setup and doesn’t prevent backflow.

When using a hose-end proportioner, protecting the water supply from contamination is essential. A fail-safe backflow prevention device is required between the proportioner and the water source because pressure changes or siphoning can cause the pesticide solution to flow back into the drinking water line. This device acts as a barrier to prevent any contaminated water from entering the supply, safeguarding people and the water system. The other options don’t address this risk: drift control relates to where droplets land, not backflow; a filter tackles solids but doesn’t stop backflow; UV disinfection isn’t a standard requirement for this setup and doesn’t prevent backflow.