What are my watering restrictions?
Does Burnaby Irrigation only offer service in Burnaby?
What is micro irrigation?
What brand of irrigation products do you use?
What is a zone?
Why water shrubs separate from lawn?
What is a run off?
What is a Backflow?
What causes backflow?
Backflow can be cause by either back-pressure or back siphonage. Back pressure is the result of a higher pressure in the system than in its supply, i.e. the system pressure has been increased by some means. This usually occurs in unvented heating systems, where thermal expansion increases the pressure. Back siphonage is the result of supply pressure being lowered below that of the system. This occurs when a supply is interrupted or drained down.
What is a backflow preventer?
A backflow preventer is a device or assembly usually enclosed with brass that consists special spring loaded check valve(s) which are designed to allow water to flow in one direction and not the other. In the event of backflow the check valve will snap shut preventing the reverse flow of water and possible contamination of your potable water supply.
Do I need a backflow preventer for irrigation?
Yes. Most municipalities require you to have an approved testable backflow preventer which requires annual testing by a certified tester to ensure correct operation of the device.
Can I test my own backlow?
Only a BCWWA certified tester can test a backflow. However some cities who do not have an adequate backflow program do allow a smaller less expensive version of the same device which is not testable. It is very difficult to determine whether or not a non testable backflow preventer is working properly.