Smart irrigation design is vital for the long-term health and well-being of your landscaping. An irrigation system is vital. This is a short overview of backflow preventers and their functions.

The Back-flow Prevention

Glendale’s Uniform Plumbing code requires irrigation systems to be approved for back-flow preventions.

Back-flow is when water flows are reversed by inadvertent actions. This occurs when water systems connect to irrigation methods.

Backflow can lead to the release of harmful substances into the drinking water supplies, such as herbicides and fertilizers. Back pressure, back siphonage and back flow can all cause backflow in irrigation systems.

Back pressure occurs when system pressure exceeds the pressure of the source line. Back siphonage happens when water is drawn backwards from a decrease in pressure, or overall negative pressure on its supply side.

Glendale, CA has many back-flow protection devices.

The highest level of security and protection for the atmosphere.

They should be located at the irrigation system’s facet at least six ft from the highest emission level. After it is depressurized it will fall and allow air flow into downstream pipes.

Pressure vacuum breaker (or Pressure Vacuum Breaker), is the next-level up from AVB. It features a spring-loaded check valve that opens when the water stops moving. A relief valve prevents the siphon from being broken if pressure drops below 1psi.

Double Check Valve Assembly This double-check assembly has two spring-loaded checks.

This device offers the best protection against back-flow.