Water Backflow Device

Backflow prevention device means a device that prevents backflow and includes a reduced pressure principle assembly dual check valve double check valve and the like.

Water backflow device. In water distribution systems water is normally maintained at a significant pressure to enable water to flow from the tap shower or other fixture. Piping material of the water meter and backflow prevention device arrangement is to be type k copper tubing to astm b88 or ductile iron special class 52 54 to awwa c151. Installing backflow prevention devices our prevention program works with industrial commercial institutional and multi residential property owners to prevent backflow into the drinking water system. Property owners are responsible for installing maintaining and testing backflow prevention devices which require a permit to install.

Backflow is the unplanned reversal of flow of water or water and contaminants into the water supply system. This must include a straight length of 1200 mm 48 beyond the water meter. A backflow preventer is a device that s installed on your home s water pipes that allows water to flow in one direction but never in the opposite direction. For backflow to occur there must be a physical connection or cross connection between the water supply and any delivered water or contaminant.

To help protect the safety of the city s drinking water it is mandatory under the city of toronto s water supply by law for property owners of industrial commercial institutional and part 3 residential properties as defined by the ontario building code as well as construction sites to install a backflow prevention device on the water supply line s to their facility. Water pressure may fail or be reduced when a water main bursts pipes freeze or there is unexpectedly high demand on the water system for example when several fire hydrants are opened. A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow. Its sole job is to prevent drinking water from being contaminated due to backflow.

Backflow of water presents a risk of contamination to the water supply and the distribution lines in an establishment. This is done to isolate buildings from the city s water distribution system helping to ensure contaminants do. Backflow means the flowing back of or reversal of the normal direction of flow of water. If any maintenance or repairs are performed on the device it must be re tested.

Backflow is an unwanted flow of potentially contaminated water in the reverse direction.