Toronto - Cross-Connection

Cross-Connection and Backflow Prevention

Nutemp Mechanical Systems introduces a vital new level of service — Cross Connection and backflow preventer inspections. This important category, required for commercial buildings, helps protect drinking water from contamination through cross-connections. Our technicians are certified to test these critical prevention systems to ensure the integrity of the water supply and safety of the community.

Cross-Connection or Backflow needs to be inspected annually. If you have received a letter of notification from the City of Toronto, or if your Cross-Connection need inspecting, call Nutemp and we will be happy for one of our technician to visit your business and inspect your equipment.

Nutemp will also be able to set your Cross-Connection up, including the surveys, drawings and submitting them to the City of Toronto.

Call now for an appointment: (905) 338-5603 ext. 306

What is Backflow?

Water normally flows in one direction from the public water system through the customer's cold or hot water plumbing. If the water begins to flow in the opposite direction, due to back pressure or back siphonage, it can become contaminated from cross-connections. Backflow can occur in any residential, commercial or industrial property.

Backflow from back siphonage is caused by a negative or sub-atmospheric pressure; a drop in the water main pressure. Events that can cause back siphonage include a water main break or a high rate of water withdrawal, such as firefighting.

Backflow from back pressure is caused when the water system is connected to a system or supply operating at a higher pressure than the municipal water system. A booster pump or elevated piping are examples of connections that operate at a higher pressure that cause back pressure.

By installing a backflow prevention device (in properties that have a severe or high hazard of cross-connections), at the point where the water service enters a building or facility, will ensure that Halton's water distribution system is free from contamination.

What is a Cross-Connection?

A cross-connection is a direct or indirect connection between the potable (drinking) water system and any other liquid, gas or other substances.

In a direct link there is a physical connection between the potable (drinking) and non-potable water system, such as an underground sprinkler system or heating and cooling system. In an indirect link the water itself makes the connection, such as a submerged hose or a leaking pipe that "pools" water around the break.

When a backflow occurs, and the water starts to flow in the opposite direction, potential contaminants (e.g. chemical or biological infectious agents) at the point of the cross-connection can be drawn back into the public water system.

Cross-connections between water supplies and sources of contamination represent one of the most significant threats to health in the water supply industry.

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