| SOLID BLACK | Can be used for all applications except fuel gases |
| BLUE STRIPE | Drinking Water |
| GREEN STRIPE | Contaminated water |
| YELLOW STRIPE | Fuel gases, process gases, liquified gases under pressure |
| DARK BLUE STRIPE | Compressed air, vacuum, pneumatic conveyor |
| RED STRIPE | Fire extinguishing supply lines |
| LILAC STRIPE | Waste or recycled water |
| SOLID ORANGE | Electrical cable and conduit |
| SOLID WHITE | Above ground for heat reduction |
