What is a backflow prevention valve and how does one work?
A properly installed, compliant backflow prevention device will protect the public drinking water supply from potential contaminants that may enter through your sprinkler system... such as pesticides, herbicides, or fertilizers.
The most commonly used backflow prevention devices for modern sprinkler systems are double check valve assemblies, which, when installed and operating properly, allow the water to flow in only one direction. This means that in the event of temporary loss of pressure on the other (or city) side of your meter – like an open fire hydrant, or water main repairs – the backflow device will stop potential back-siphonage, or water flowing backwards (backflow) into the drinking water lines.
Typically local or State laws will require some type of backflow prevention device on all sprinkler/irrigation systems. Municipal water departments, or building inspection departments will often require permits, will test them upon installation, and require periodic inspections by a certified backflow technician.
Unfortunately, many older sprinkler systems – and perhaps newer ones installed by unscrupulous contractors – don’t have a backflow prevention device in place. Contaminated water can pose serious health risks… in fact, there have been documented incidents where back-siphonage has caused illness and even death.
Better to be safe, than sorry... make sure you have one on your system… and if, for whatever reason you don’t, or aren't sure whether you have one or not... don’t wait another minute… call us NOW at 651.646.7502 and we’ll take care of it for you.