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Backflow Preventer Testing

High-Point Plumbing specializes in backflow preventer testing. We help factories and large companies by checking the valves that protect you from sending contaminated water back into our water systems.

What we do

High-Point Plumbing specializes in backflow preventer testing. We halp factoriesand large companies by checking the valves that protect you from sending contaminated water back into our water systems.

Our representatives are certified having completed the Cross Connection Control course as specified by the Ontario Water Works Association.

Many people are unaware that backflow conditions can jeopardize system water quality, posing a health risk to consumers drinking water from the system.

We take this very seriously at High-Point plumbing and take all the necessary measures to ensure that your company is compliant and not impacting our environment in a negative way.

One of the main concerns of the OWWA and the water industry, “is the prevention of backflow, which is a flowing back of water, or reversal of the normal flow. If backflow occurs in a public water system, the action can pollute or contaminate the water in that system creating a health hazard for consumers”.

What is a cross-connection?

A cross-connection is any actual or potential connection between a potable (drinking) water system and any source of pollution or contamination.

What is backflow?

Backflow is a flowing back of water or reversal of the normal direction of flow. Backflow may occur due to either back siphonage or back pressure.

What is a backflow preventer?

Simply put, a backflow preventer is a device or assembly that prevents backflow. Some types of backflow preventers require testing to ensure that they will work as intended and there are some that do not require testing.

What is back siphonage?

Back siphonage is backflow caused by a negative pressure (i.e., a vacuum or partial vacuum) in a public water system. The effect is similar to drinking water through a straw. Back siphonage can occur when there is a stoppage of water supply due to nearby firefighting, a break in a water main, high velocities in pipe lines, line repair or break that is lower than a service point, lowered main pressure due to high water withdrawal rate such as firefighting or water main flushing or reduced supply pressure on the suction side of the booster pump.

What is backpressure?

Back pressure is pressure that is greater than the municipal water system supply pressure. It can happen when there is a connection to a non-potable supply operating at a higher pressure than the water distribution system. Increases in pressure can be created by booster pumps, temperature increases in boilers, interconnections with systems operating at higher pressures, and elevated piping (e.g., 30 feet above finished grade).

What causes backflow?

An example is when there is a water main break and the area must be isolated and repaired. When the valves around the repair site are closed, the flow of water is stopped to all points of use such as homes and businesses and begins to flow backwards towards the repair. This is back siphonage and if there are cross connections, contaminants can be drawn into the water system.

What happens after backflow occurs?

When the repair is completed and the regular pressure is restored everything starts to flow in the proper direction. Any contaminants that had a chance to enter the water supply will start to flow towards any point of use (plumbing fixtures) in homes or businesses. The degree of hazard to health will be dependent on the type and amount of contaminant, the amount of time the situation goes unnoticed and whether or not a protective device is in place.


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