Don't know if you should replace your entire backflow device or just the parts? Maybe you want to know what parts to buy for your existing backflow device? Or even would like watch a video that teaches you exactly how to repair your backflow device? If you have questions like the above, please choose from one of the following buttons:
Shut off bottom valve handle. Turn to right.
Remove all broken plastic parts from inside the device.
Unscrew plastic bonnet
Remove any broken pieces from the inside
There should not be ANY plastic pieces remaining inside device
DO NOT mess with metal piece at bottom inside the device as it has a spring below it that would hurt you.
Screw in new bonnet / poppet kit (Hand Tight ONLY).
Place bell on top of metal screw and tighten small nut just enough to hold the metal bell on the device and still rotate by hand with some tension.
DO NOT OVERTIGHTEN!
Cover device with a blanket if freezing temperatures persist.