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Kesar Digum

Backflow Preventer

What Is a Backflow Preventer and Who Must Have an Annual Test?

A backflow preventer is a small safety device with a critical job: to stop contaminated water from flowing back and polluting the public drinking-water network. The law requires many types of consumers to install a backflow preventer and have it tested annually by a certified inspector.

Backflow preventer assembly installed on a main water line, requiring annual testing

Why a Backflow Preventer Is Needed

Under certain conditions, such as a sudden drop in network pressure, water can flow in the reverse direction - from the consumer's premises back into the public water network. If that facility contains contaminants, they can be drawn into the network and endanger other consumers. The backflow preventer blocks this reverse flow and protects everyone's drinking water.

Who Must Install a Backflow Preventer

  • Industrial plants and businesses that use chemicals.
  • Buildings with fire-suppression, irrigation or cooling systems.
  • Hospitals, dental clinics and laboratories.
  • Garages, fuel stations and businesses that pose a water-contamination risk.

The Annual Test

A backflow preventer is a mechanical device that wears out over time, so the law requires an annual functionality test by a certified inspector. The test verifies that the valves seal properly and that the device continues to do its job. On completion, a test certificate is issued and submitted to the water utility.

Not Just a Legal Obligation

A working backflow preventer is the last line of defense between the consumer's premises and the drinking-water supply. A timely annual test prevents fines from the water utility, but more importantly, it ensures the device will actually perform when it matters.

How We Help

A certified inspector from Kesar Digum comes to the site, tests the backflow preventer according to procedure, documents the findings and issues a test certificate. We also support you in coordinating with the water utility and tracking the date of the next test, nationwide.

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