🟢 Potable / Non-Potable Water (Green)
Use: Carries drinking water (potable) or general-use water (non-potable).
Why It Matters: Ensures users don’t accidentally drink or misuse untreated water.
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🔴 Firefighting Water / Sprinkler Lines (Red)
Use: Dedicated to fire suppression systems like fire hydrants and sprinklers.
Why It Matters: Quick identification during emergencies is critical.
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🟡 Flammable Gases (Yellow)
Use: Transports gases such as natural gas, propane, acetylene, etc.
Why It Matters: High risk of fire or explosion—needs immediate attention and caution.
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🔵 Compressed Air (Blue)
Use: Supplies compressed air to tools, machines, or systems.
Why It Matters: Helps avoid accidental connection with other gases or liquids.
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⚫ Steam Condensate (Black)
Use: Returns used steam (condensate) to be reheated or drained.
Why It Matters: Contains hot fluid; requires proper insulation and handling.
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🟤 Waste / Sewage (Brown)
Use: Carries sanitary or industrial wastewater.
Why It Matters: Prevents cross-contamination with clean water systems.
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⚪ Electrical Conduits / Telecommunication Lines (Grey)
Use: Houses electrical wires or data/communication cables.
Why It Matters: Prevents accidental cutting or contact with live wires.
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🟣 Reclaimed / Treated / Recycled Water (Purple)
Use: Contains non-potable water that’s treated for reuse (e.g., irrigation, cooling).
Why It Matters: Not for human consumption—clearly differentiates from fresh water.
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🟢 Cooling Water (Dark Green)
Use: Used in HVAC or industrial equipment for cooling.
Why It Matters: Helps regulate machinery temperatures—vital for safe operations.
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⚪ Aluminum with Labels (Silver/Grey with Text)
Use: Multi-purpose line identified by labeled text (used when no standard color applies).
Why It Matters: Custom labeling ensures clarity when color coding alone isn’t sufficient.
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