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Components of a Sprinkler Head Every sprinkler head has multiple precision parts working in unison: Frame: The structural body directly attached to the water pipe Cap and gasket: Seals the water in until activation Deflector: Shapes a spray pattern for maximum efficiency and coverage Heat-sensitive element: Either a glass bulb with colored liquid or a fusible ink Color coding in the heat-sensitive element lets inspectors and installers ensure proper placement

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For reference, 140-degree coverage from the front camera is decent, so 310 degrees all round is great

On first attempt I could not get things to line up in the center area of the dash