Sprinkler head plan symbol

A small circle marking a suppression outlet.

Also known as: Sprinkler plan symbol, Suppression head symbol

Engineering & technicalQuiet profile

Meanings

On a building services plan a sprinkler head is drawn as a small circle at a ceiling position, part of a distributed suppression system.

Common modern usageVerified fact
Denotes a sprinkler head at the position drawn.
Contexts: Technical drawing
Common modern usageVerified fact
Is drawn in a regular grid because coverage is a property of spacing, so the pattern on the plan carries as much meaning as the individual symbol.
Contexts: Technical drawing

A small circle at a ceiling position, drawn as part of a regular grid across the protected area.

A fuller structured visual breakdown is not yet documented for this symbol.

IdentityModerate confidence: Moderate confidence because the identity is documented in encyclopedic references, but only a single source has been found so far.
Historical originLow confidence: Low confidence because the historical origin is documented in encyclopedic references, but only a single source has been found so far, but early or supporting evidence is limited, but the regional or cultural match to this specific claim is not precise.
Current useModerate confidence: Moderate confidence because the current use is documented in encyclopedic references, but only a single source has been found so far.
Visual matchModerate confidence: Moderate confidence because the visual match is documented in encyclopedic references, but only a single source has been found so far.

Architectural drawing
Wikipedia · retrieved 2026-08-24
Tertiary reference. Used for how a plan symbol is drawn and the plain-language name it carries. Not used for any regulatory requirement; building regulations differ by jurisdiction and no record asserts one.

Last reviewed 2026-08-24

Meanings

On a building services plan a sprinkler head is drawn as a small circle at a ceiling position, part of a distributed suppression system.

Common modern usageVerified fact

Denotes a sprinkler head at the position drawn.

Common modern usageVerified fact

Is drawn in a regular grid because coverage is a property of spacing, so the pattern on the plan carries as much meaning as the individual symbol.

Confidence

IdentityModerate confidence: Moderate confidence because the identity is documented in encyclopedic references, but only a single source has been found so far.
Historical originLow confidence: Low confidence because the historical origin is documented in encyclopedic references, but only a single source has been found so far, but early or supporting evidence is limited, but the regional or cultural match to this specific claim is not precise.
Current useModerate confidence: Moderate confidence because the current use is documented in encyclopedic references, but only a single source has been found so far.
Visual matchModerate confidence: Moderate confidence because the visual match is documented in encyclopedic references, but only a single source has been found so far.