Service Schedule System 4000 Color Bands
Water Lines
Raw Water Olive Green 4070 Generator Green
Settled or
Aqua 4068 Alloy Aqua
Clarified Water
Finished or
Dark Blue 4086 Safety Blue
Potable Water
Sprinklers Dark Red 4081 Safety Red
Suction Line
Mid Blue 4063 Robotic Blue
(Pump Stations)
Pressure Line
Safety Blue 4086 Safety Blue
(Pump Stations)
Water Lines
Backwash Waste Light Brown 4003 Pallet Tan
Sludge Dark Brown 4009 Walnut Brown
Sanitary Sewer
Dark Gray 4025 Anchor Gray
or Other
Sewage Effluent Clay 4048 Mason Brick
Raw Sludge Brown/Black 4001 Bolt Brn 4032 Black
Sludge Recirc Brown/Yellow 4001 Bolt Brn 4084 Safety Yellow
Sludge Draw Off Brown/Orange 4001 Bolt Brn 4083 Safety Orange
Sludge Recirc Dischg Brown 4001 Bolt Brn
Sludge Gas Orange-Red 4084 International Orange
Natural Gas Orange-Red/Black 4084 International Orange 4032 Black
NonPotable Water Blue/Black 4086 Safety Blue 4032 Black
Potable Water Blue 4086 Safety Blue
Chlorine Yellow 4084 Safety Yellow
Sulfur Dioxide Yellow/Red 4084 Safety Yellow 4081 Safety Red
Sewage Gray 4026 Slate Gray
Compressed Air Green 4071 Rain Forest
Chemical Lines
Alum or
Orange 4083 Safety Orange
Primary Coagulant
Ammonia White White
Carbon Slurry Black Black
Caustic Yellow with Green 4084 Safety Yellow 4085 Safety Green
Chlorine Yellow 4084 Safety Yellow
Fluoride Light Blue with Red Hydro Blue 4081 Safety Red
Lime Slurry Light Green 4069 Emerald Ice
Ozone Yellow with Orange Safety Yellow 4083 Safety Orange
Phosphate Compounds Light Green with Red 4069 Emerald Ice 4081 Safety Red
Polymers or Orange with Green 4083 Safety Orange 4085 Safety Green
Coagulant Aids
Potassium Permanganate Violet 4080 Plumb
Light Green
Soda Ash 4069 Emerald Ice 4083 Safety Orange
with Orange
Sulfuric Acid Yellow with Red 4084 Safety Yellow 4081 Safety Red
Light Green
Sulfur Dioxide 4069 Emerald Ice 4084 Safety Yellow
with Yellow
Other Lines
Compressed Air Dark Green 4071 Rain Forest
Gas Red 4040 Deck Red
Other Lines Light Gray 4019 Flint Gray
Hoists, Trolleys Yellow 4084 Safety Yellow
Fire Protection Red 4081 Safety Red
Steam Orange 4083 Safety Orange
Oil Ivory 4036 Mill Ivory
Color Bands
Although some plants paint the full length of all piping with an identifying color, a better
appearance results if pipes are painted the same color as the adjoining wall or ceiling, with the
contents identified by color bands at intervals along the line. Valves and connections and where
the pipe passes through walls and floors are good places for the identifying color. The color band
should be at least 8" long for small diameter pipe and increased for larger pipe, up to 24" for 10"
pipe and 32" for sizes over 10" diameter.
Safety Red
Fire protection equipment, containers of flammable liquids, lights at barricades and obstructions,
stop bars and switches on machinery, fire alarm boxes, fire exit signs, sprinkler piping
Safety Yellow
Caution, physical hazard, construction equipment, handrails, Guardrails, material Handling
Equipment, piping systems containing dangerous materials, waste containers, exposed,
unguarded edges
Safety Orange
Dangerous parts of machinery, inside of movable guards, safety starting buttons, exposed parts
Safety Blue
Caution, equipment under repair. Warnings should be located at the
starting point or power source of machinery.
Safety Green
Safety, first aid equipment, safety bulletin boards, gas, masks, stretchers, safety deluge showers.
Black & White
Traffic and housekeeping markings, dead ends of aisles or passageways, stairways, directional
signs, and refuse cans.
Safety Purple
Designates radiation hazards. Often used in combination with yellow on tags, labels, signs, and
floor markers.
Green for fresh water
„« Crimson red for steam
„« Signal red for fire fighting
„« Dark brown for oils or combustible liquids
„« Orange for chemicals
„« Light blue for air
„« Black for process effluents (drain / vent/ flare, etc)
Gas Cylinders
„« Black for oxygen
„« French gray for Nitrogen
„« Maroon for acetylene
