MECHANICAL AND PLUMBING SYMBOLS AND ABBREVIATIONS

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MECHANICAL AND PLUMBING SYMBOLS AND ABBREVIATIONS
MECHANICAL AND PLUMBING SYMBOLS AND ABBREVIATIONS

SHEET NUMBER OF
DETAIL LOCATION
DETAIL (LETTER)
SHEET NUMBER OF
SECTION OR ELEVATION
NUMBER
SECTION OR ELEVATION
DENOTED
EXISTING
SIZE OF
PIPE OR
DUCT
8″E.
DENOTED
NEW WORK
DENOTED
EXISTING
WORK
CONNECTION
TO EXISTING
FLOW SWITCH
TEMPERATURE CONTROL PANEL
VARIABLE FREQUENCY DRIVE
PETE’S PLUG
DIFFERENTIAL PRESSURE TRANSMITTER
MOTORIZED DAMPER
FLOW METER
CARBON DIOXIDE SENSOR
ROOM THERMOSTAT (HEAT)
HUMIDISTAT
DUCT THERMOSTAT (ELECTRIC)
ROOM THERMOSTAT (HEAT/COOL)
ROOM THERMOSTAT (COOL)
DUCT THERMOSTAT (PNEUMATIC)
TEMPERATURE SENSOR
WASTE STACK
WALL HYDRANT
VENT STACK
VENT THRU ROOF
WASTE
WET BULB
WATER CLOSET
TEMPERATURE CONTROL PANEL
TRANSFER GRILLE
TRANSFER OPENING
TRAP PRIMER LINE
TYPICAL
URINAL
VARIABLE AIR VOLUME
VITRIFIED CLAY PIPE
VARIABLE FREQUENCY DRIVE
SUPPLY AIR
SANITARY
SMOKE DAMPER
SUPPLY GRILLE
SHOWER DRAIN
SINK
SUPPLY REGISTER
STAINLESS STEEL
SHELL AND TUBE HEAT EXCHANGER
TEMPERATURE CONTROL CONTRACTOR
ROOF RELIEF VENT
RETURN REGISTER
ROOF INTAKE VENT
INVERT ELEVATION
LEAVING AIR TEMPERATURE
LAVATORY
1000 BTU/HOUR
MECHANICAL
MANHOLE
MECHANICAL CONTRACTOR
MOP SINK
AUTOMATIC MAKE-UP VALVE
NORMALLY CLOSED
NORMALLY OPEN
OUTSIDE AIR
OPPOSED BLADE DAMPER
OUTSIDE DIAMETER
OVERFLOW DRAIN
OPEN SITE DRAIN
PLATE AND FRAME HEAT EXCHANGER
POST INDICATOR VALVE
PLUMBING
PRESSURE REDUCING VALVE
PROPELLER UNIT HEATER
RETURN AIR
RADIANT CEILING HEATING PANEL
REINFORCED CONCRETE PIPE
ROOF DRAIN
RECIRCULATING
RETURN GRILLE
REDUCED PRESSURE BACKFLOW PREVENTER
GC        GENERAL CONTRACTOR
GEN       GENERAL
HB        HOSE BIBB
HTG       HEATING
HW        HOT WATER
ID         INTERNAL DIAMETER
AD        AREA DRAIN
AFC       AUTOMATIC FLOW CONTROL
AFF       ABOVE FINISHED FLOOR
AHR       AIR HOSE REEL
AHU       AIR HANDLING UNIT
ALT       ALTERNATE
AP        ACCESS PANEL
AS        AIR SEPARATOR
BD        BLOWDOWN
BDD       BACKDRAFT/PRESSURE RELIEF DAMPER
BTU       BRITISH THERMAL UNIT
BV        BALANCE VALVE
CB        CATCH BASIN
CI         CAST IRON
CL         CENTERLINE
CO        CLEANOUT
COND      CONDENSATE
CONV      HYDRONIC CONVECTOR
CUH       CABINET UNIT HEATER
CW        COLD WATER
DB        DRY BULB
DF        DRINKING FOUNTAIN
DIA        DIAMETER
DIFF       DIFFUSER
DS        DOWNSPOUT
DXC       DIRECT EXPANSION COOLING COIL
EA        EXHAUST AIR
EAT       ENTERING AIR TEMPERATURE
EBBR      ELECTRIC BASE BOARD RADIATION
EC        ELECTRICAL CONTRACTOR
EG        EXHAUST GRILLE
ECONV     ELECTRIC CONVECTOR
ECUH      ELECTRIC CABINET UNIT HEATER
EF        EXHAUST FAN
ELEC      ELECTRICAL
ELEV      ELEVATION
EOM       END OF MAIN DRIP
EPUH      ELECTRIC PROPELLER UNIT HEATER
ER        EXHAUST REGISTER
ERCP      ELECTRIC RADIANT CEILING PANEL
ESP       EXTERNAL STATIC PRESSURE
EWC       ELECTRIC WATER COOLER
EWH       ELECTRIC WATER HEATER
ET        EXPANSION TANK
EXTG, E.   EXISTING
FD        FLOOR DRAIN OR FIRE DAMPER
FPVAV     FAN POWERED VAV
FOB       FLAT ON BOTTOM
FSD       COMBINATION FIRE/SMOKE DAMPER
FTR       HYDRONIC FINNED TUBE RADIATION
GAS OUTLET
MEDICAL AIR
SLIDE
VACUUM OUTLET
NITROUS OXIDE OUTLET
NITROGEN OUTLET
MEDICAL AIR OUTLET
OXYGEN OUTLET
NITROGEN
DEIONIZED WATER
ACID VENT
NITROUS OXIDE
DISTILLED WATER
VACUUM LINE
ACID WASTE (SUSPENDED)
ACID WASTE (BURIED)
OXYGEN
ALARM CHECK VALVE
WET FIRE PROTECTION PIPING
FLOW SWITCH
TAMPER SWITCH
PRE-ACTION SPRINKLER PIPING
DRY PIPE SPRINKLER PIPING
DRY STANDPIPE
CONCEALED SPRINKLER HEAD
FIRE HYDRANT
POST INDICATOR VALVE
FIRE PROTECTION PIPING
UPRIGHT  SPRINKLER HEAD
PENDANT SPRINKLER HEAD
SIAMESE HOSE CONNECTION
INTERNAL LINED DUCT
SMOKE DAMPER (SD) IN DUCT
(FSD) IN DUCT
COMBINATION FIRE/SMOKE DAMPER
ACCESS PANEL
SUPPLY DUCT UP
VOLUME DAMPER
SUPPLY DUCT DOWN
FIRE DAMPER (FD) IN DUCT
RETURN OR EXHAUST DUCT UP
RETURN OR EXHAUST DUCT DOWN
FINNED TUBE RADIATION IN COVER
FINNED TUBE RADIATION
RADIATION COVER ONLY
BARE PIPE IN COVER
MANUAL REFRIGERATION VALVE
EVAPORATOR PRESSURE REGULATOR
THERMOSTATIC EXPANSION VALVE
FILTER-DRYER
SIGHT GLASS
CHARGING VALVE
THROTTLING VALVE
3-WAY CONTROL VALVE
CONTROL VALVE (TCV)
TEMP/PRESSURE RELIEF VALVE
AUTOMATIC AIR VENT
SHUT-OFF VALVE
VERTICAL SHUT-OFF/NEEDLE VALVE
BALANCING VALVE
CHECK VALVE
PRESSURE REDUCING VALVE
MAKEUP WATER VALVE
FLOW CONTROL VALVE
SAFETY/PRESSURE RELIEF VALVE
DUAL TEMPERATURE SUPPLY
DUAL TEMPERATURE RETURN
REFRIGERANT SUCTION
REFRIGERANT LIQUID
REFRIGERANT HOT GAS
HEATING WATER RETURN
HEATING WATER SUPPLY
FUEL OIL SUPPLY
GROUND LOOP WATER RETURN
CHILLED WATER RETURN
GROUND LOOP WATER SUPPLY
CHILLED WATER SUPPLY
CONDENSER WATER RETURN
CONDENSER WATER SUPPLY
FUEL OIL RETURN
FUEL OIL VENT
REFRIGERANT DISCHARGE
CONDENSATE PUMP DISCHARGE
MEDIUM PRESSURE CONDENSATE RETURN
HIGH PRESSURE CONDENSATE RETURN
BOILER FEED WATER
EMERGENCY BOILER FEED WATER
LOW PRESSURE STEAM
MEDIUM PRESSURE STEAM
HIGH PRESSURE STEAM
LOW PRESSURE CONDENSATE RETURN
CONDENSATE RETURN
THERMOSTATIC TRAP
INVERTED BUCKET TRAP
FLOAT & THERMOSTATIC TRAP
THERMOMETER
ECCENTRICAL REDUCER
PIPE SLEEVE
FLOOR DRAIN
CLEANOUT
TEE
ELBOW
FLOW ARROW
FLEX CONNECTOR
COMPOUND GAUGE
AUTOMATIC AIR VENT
PRESSURE GAUGE
PIPE PITCH ARROW
(DOWN IN ARROW DIRECTION)
AIR CHAMBER
SHOCK ABSORBER
ELBOW UP
ELBOW DOWN
TEE UP
TEE DOWN
CONCENTRIC REDUCER
END CAP
UNION
PIPE ALIGNMENT GUIDES
EXPANSION JOINT
PIPE ANCHOR
FLANGED CONNECTION
STRAINER
WELL WATER
GAS METER
WATER METER
RPBP  (REDUCED PRESSURE
RPZ   BACKFLOW PREVENTER)
COLD WATER
HOT SOFT WATER RETURN
HOT SOFT WATER
HOT WATER
HOT WATER (140° F)
HOT WATER RETURN
HOT WATER (180° F)
HOT WATER RETURN (140° F)
TEMPERED WATER
HOT WATER RETURN (180° F)
COLD S0FT WATER
NON-POTABLE WATER
GAS
AIR (WITH PSI)
ST0RM WATER (SUSPENDED)
ST0RM WATER (BURIED)
SANITARY VENT LINE
SANITARY WASTE (SUSPENDED)
SANITARY WASTE (BURIED)
DRAIN LINE
REFRIGERATION VALVES/FITTINGS
SECTIONS AND DETAILS
MEDICAL
DRAWING NOTATIONS
TEMPERATURE CONTROL/MONITORING
VALVES
PIPE FITTINGS
FIRE PROTECTION SYSTEM
HVAC PIPING
DUCT SYMBOLS
ABBREVIATIONS
RADIATION SYMBOLS
STEAM PIPING
MECHANICAL AND PLUMBING SYMBOLS AND ABBREVIATIONS
PLUMBING

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