To protect the drinking water system, the City of Dieppe checks the cross connections found in commercial buildings (see Bylaw 78-5(9)).
What is a cross connection?
An actual or potential connection between any part of the drinking water system and another environment containing other substances (non-potable water, chemicals, etc.). In the event of backflow, those substances could enter and contaminate the drinking water system.
Backflow occurs when water flows in the opposite direction to its usual flow and is caused by a change in water pressure.
How can backflow be avoided?
By ensuring that there is a backflow prevention device at possible cross connection points. City staff inspects these devices in businesses every year to make sure they are compliant and functional. However, all commercial and residential building owners are responsible for maintaining their own devices.
Do houses have cross connections?
Yes, cross connections can also be found in residential buildings (swimming pools, irrigation systems, etc.), but they are less common than in commercial buildings. Newer homes are equipped with backflow prevention devices. For older homes, it is recommended to have one installed by a certified plumber.
Why are cross connections a concern?
A poorly protected or unprotected cross connection can contaminate drinking water, not only in your business or home, but also in the water line supplying nearby homes and businesses. Commercial and residential property owners are responsible for ensuring that there are no cross connections on their property. If you think there may be a cross connection in your home or building, contact the provincial Department of Public Safety at 506.856.2320.