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Impact sprinkler couplings for connecting sprinklers to threaded risers. They provide room for the moving parts that extend below the sprinkler’s threaded inlet so the sprinkler can turn freely.
An ordinary coupling can obstruct the moving parts on some impact sprinklers, even when the thread size matches.
Where an arrow is marked, point it towards the sprinkler. Fit reducing couplings with the smaller end upwards towards the sprinkler.
Small black sprinkler coupling with female threaded ends