Here are some common reasons why a pop-up sprinkler may stay stuck up:
- Debris in the pop up body
- The riser is damaged
- The riser seal is worn
To fix this:
- Unscrew the body cap
- Pull out the sprinkler assembly
- Examine the parts
- Clean out debris
- Replace parts if necessary
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If the riser seal is worn, follow the instructions to replace the riser seal.