Where is the backflow preventer on a sprinkler system

In most areas, the irrigation system uses the same water supply as the house or main building. Backflow occurs when water moves in the wrong direction. From the irrigation system and back into the water supply. The cause of the backflow Preventer is simply the way water behaves.

Water wants to go from an area of high pressure to an area of lower pressure. And this is exactly what it does. So the issue occurs when the water pressure in the system is too high compared to the water supply. When this happens. The water looks to go where there is lower pressure — in this case, back to the water supply. Backflow may not be as common as a broken sprinkler head. But it can be a much larger issue. The main issue with backflow has to do with contamination. Most sprinkler systems are set up along potable municipal water supply lines.

After installation, you have to activate the sprinkler system and keep an eye on the backflow device. Make sure there are no leaks from the connection points. Try replacing the entire valve if your backflow valve body contains a crack. This will be more appropriate than repairing the components inside.

Take note that the crack will allow water to leak from the valve which will cause contamination of water and some unnecessary waste. Contact Us Removing the Nut on the Bell Cover Use a wrench to remove the nut from the bell cover. Inspecting the Interior of the Valve If you can notice, there is a poppet and bonnet from the interior of the valve.

Putting Back the Bell Cover On You have to slide the bell cover back to the valve and verify that it is leveled on top of the valve. Installing the Nut to the Valve Just put the nut on top of the bell cover and tighten it manually into the valve. Control your water supply and pressure with a backflow valve device, or any part or accessory you need to keep your valves operating properly, right here.

Conbraco Backflow Devices. Febco Backflow Devices. Wilkins Backflow Devices. Filters icon Filters. Show 24 36 48 View as Grid icon List icon. In Stock 8. View full details. In Stock 9. Vacuum Breakers: These are effective only against back-siphonage. These mechanical backflow preventers are not to be used when back-pressure problems may exist.

The atmospheric vacuum breaker AVB is gravity operated and must be installed in a vertical position. The disc float assembly tends to stick in the closed position if under continuous water pressure for long periods of time. It must be installed on the downstream side of all shut-off valves on each sprinkler zone valve. One AVB device is needed in each zone. Combination AVB and sprinkler valves are available. In these units, a single-valve body combines both a control valve and an atmospheric vacuum breaker.

When used, these combination devices must be installed in a vertical position on each zone, with the AVB side downstream of the control side of the unit. This device must always be installed at least six 6 inches check local codes above all downstream piping and outlets.

The pressure vacuum breaker PVB is designed to open after long periods of continuous water pressure. This type of device may be installed under a constant pressure upstream of all control valves. This device must be installed in a vertical position and at least twelve 12 inches above all downstream piping. The PVB is equipped with test cocks and must be tested yearly by a backflow technician.

The reduced pressure RP backflow device is the highest level of protection available. This device protects from backflow and back pressure.

When installing the device, a minimum of 12 inches of access and clearance between the lowest portion of the device and grade, floor or platform must be provided.