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What does backflow mean?

: a flowing back or returning especially toward a source.

How often should Rpz be tested?

Reduced Pressure Zone (RPZ) assembly needs to be tested annually and rebuilt every 5 years. Double Check Valve (DCV) assembly needs to be tested every 3 years.

How does RPZ backflow work?

They work like a double-check (DC) backflow preventer, but also have an intermediate relief valve that opens to the atmosphere if both check valves should fail. Backflow preventers work by letting water flow through them in one direction, but prevent water from flowing back through them in a reverse direction.

What's the difference between backflow and RPZ?

The main thing to take away from this is that both backflow prevention device types perform the same function when they are operating properly, but only the RPZ is designed to protect the public water supply by disposing of any backwards-flowing water if any of the check valves or the relief valve fails.

What is the difference between a backflow and RPZ?

The main thing to take away from this is that both backflow prevention device types perform the same function when they are operating properly, but only the RPZ is designed to protect the public water supply by disposing of any backwards-flowing water if any of the check valves or the relief valve fails.

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