Acetylene

Yellow

Black

ACETYLENE

Acid Vent

Yellow

Black

ACID VENT

AV

Acid Waste

Yellow

Black

ACID WASTE

AW

Argon

Blue

White

ARGON

Carbon Dioxide

Yellow

Black

CARBON DIOXIDE

Chilled Water Return

Green

White

CHILLED WATER RETURN

CHR

Chilled Water Supply

Green

White

CHILLED WATER SUPPLY

CHS

Compressed Air

Green

White

COMPRESSED AIR

AIR

Condenser Water Return

Green

White

CONDENSER WATER RETURN

CWR

Condenser Water Supply

Green

White

CONDENSER WATER SUPPLY

CWS

Deionized Water (Supply & Return)

Green

White

DEIONIZED WATER

D.I. WATER

Distilled Water (Supply & Return)

Green

White

DISTILLED WATER

Domestic Cold Water

Green

White

DOMESTIC COLD WATER

DOM. CW

Domestic Hot Water Return

Yellow

White

DOMESTIC HOT WATER RETURN

DOM. HW

Domestic Hot Water Supply

Yellow

White

DOMESTIC HOT WATER SUPPLY

DOM. HWR

Fire Water

Red

White

FIRE WATER

FIRE

Helium

Blue

White

HELIUM

Hot Water Return

Yellow

Black

HOT WATER RETURN

HWR

Hot Water Supply

Yellow

Black

HOT WATER SUPPLY

HWS

Hydrogen

Yellow

Black

HYDROGEN

Irrigation Water

Green

White

IRRIGATION WATER

LP Gas

Yellow

Black

LP GAS

Make-up Water

Green

White

MAKE-UP WATER

Natural Gas

Yellow

Black

NATURAL GAS

Nitrogen

Blue

White

NITROGEN

Nitrous Oxide

Yellow

Black

NITROUS OXIDE

Non-Potable Water

Green

White

NON-POTABLE WATER

Oxygen

Yellow

Black

OXYGEN

Reverse Osmosis Water

(Supply & Return)

Green

White

R.O. WATER

Sanitary Vent

Yellow

Black

SANITARY VENT

Sanitary Waste

Yellow

Black

SANITARY WASTE

Steam

Yellow

Black

STEAM

Steam Condensate

Yellow

Black

CONDENSATE

Hazardous Materials

Yellow

Black

Low Hazard Liquid

Green

White

Fire Quenching Materials

Red

White

Low Hazard Gasses

Blue

White