For long-term success of your landscaping and plants, smart irrigation design is essential. It is essential to install an irrigation system. Here’s a quick overview of what back-flow preventions are and how they work.

Back-flow Prevention

According to the Uniform Plumbing Code, irrigation systems must be approved for back flow preventions. These devices protect Long Beach’s water supply from contamination.

Back flow is water flow that is reversed due to inadvertent actions. This can happen when water systems are connected with irrigation methods.

Back flow can result in the release of herbicides, fertilizers and other harmful substances from the irrigation system into the public drinking water supply. Back pressure and back siphonage can cause back flow in irrigation systems.

Back pressure occurs when the system pressure is higher than the pressure at the source. Back siphonage is when water is drawn backwards due to a decrease or overall negative pressure on the water supply side.

Long Beach, CA has a number of back-flow prevention devices.

Atmospheric Vacuum Breakers These valves offer the highest level security and back flow prevention.

They should be placed at least six feet away from the highest emission stage of the irrigation system’s sidet. It will begin to fall once it has been depressurized. This will allow air to flow downstream pipes.

Pressure vacuum breaker: A PVB, or Pressure Vacuum Breaker, is the next step up from AVB. The siphon is protected from being broken by a spring-loaded check valve. This valve opens when water stops moving.

Double check valve assembly The DCV double-check valve is an assembly with two spring-loaded checking devices.

High pressure assembly These devices provide the greatest protection against back flow.