How to repair a backflow by installing a new “Bonnet & Poppet”


Cold weather is finally here and regardless of where you live there are certain things you need to know about your sprinkler system that will help you to avoid unwanted repairs or costly repair service calls.

If you have a sprinkler system, chances are that you also have a backflow preventer. A majority of backflow preventers are designed with a fail-safe in mind to prevent irreparable damage. The following guide will outlines the steps necessary to repair your own backflow preventer if freezing temperatures have damaged it.

1. Shut off the water supply to the backflow preventer.

Shut off of the bottom valve

  •  Turn the water supply off to the backflow by turning the lower handle (as shown)

 

 

 

 

inside_empty2. 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 the device
  • DO NOT mess with metal piece at bottom inside the device as it has a spring below it that would hurt you.

 

poppet-stack3.  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

 

 

 

 

 

Sprinkler Warehouse carries two brands of kits. Click on the images below to learn more about each and purchase at a guaranteed low price.

poppet-1poppet-2

 

 

 

 

 

 

 

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