backflow preventer
In French: dispositif antirefoulement
Definition
A device fitted between the drinking water supply and the irrigation system to stop system water, which can carry soil or fertilizer, from flowing back into the drinking water. In Quebec, the connection to the potable supply and this device are plumbing work; piping installed downstream of the device is excluded from the Plumbing chapter of the Construction Code.
Also called
- backflow prevention device
- backflow assembly
Other names in French
- antirefoulement
- DAr
Sources
The Construction Code excludes from its Plumbing chapter the installation located downstream of an individual-protection backflow preventer. (art. 3.02.01)
Code de construction, RLRQ c. B-1.1, r. 2 · LégisQuébec, Éditeur officiel du Québec
Plumbing done for others falls under subcategory 15.5, reserved to CMMTQ members.
Liste des sous-catégories de licence (document 1592, édition 2025-10) · Régie du bâtiment du Québec