PLUMBING - symbols, abbreviations, demolition notes

Oct 25, 2026

Uploaded by Ophelia

Plumbing reference content compiling common piping-related symbols, abbreviations, and demolition notations for building utility and drainage systems. Lists service mediums (cold, hot, return, non-potable, deionized, tempered) and waste categories (waste, storm, acid vent/waste, garage, kitchen, laundry, indirect). Also provides component and fixture terminology for guides, valves, unions, meters, pumps, cleanouts, outlets, riser/section indicators, and common measurement and equipment abbreviations used in plans.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages9

Reading Time23 min

AccessFree to download

Symbols

Abbreviations

Demolition Notes

| SYMBOLS | ABBREVIATIONS | DEMOLITION NOTES | | --- | --- | --- | |

~~ ~~ ~~ ~~ V ~~ ~~ ~~ ~~ ~~ ~~ EX.~~ ~~V~~ ~~ ~~ ~~ ~~ ~~
~~ W ~~
~~ ~~EX.~~ ~~W~~ ~~

~~ ~~ ~~ ~~ ~~ A~~V~~ ~~ ~~ ~~ ~~ ~~
~~ ~~ ~~ ~~ EX. AV ~~ ~~ ~~ ~~

~~ DI ~~
~~ ~~EX.~~ ~~D~~I ~~
~~ ~~R~~O ~~
~~ ~~EX.~~ ~~RO~~ ~~
~~ ~~TW~~ ~~EX.~~ ~~TW~~ ~~
~~ ~~GW~~ ~~EX.~~ ~~GW~~ ~~
~~ ~~IW~~ ~~EX.~~ ~~IW~~ ~~
~~ ~~KW~~ ~~EX.~~ ~~KW~~ ~~
~~ ~~LW~~ ~~EX.~~ ~~LW~~ ~~
~~ G ~~
~~ ~~EX.~~ ~~G~~ ~~
COLD WATER (CW)
COLD WATER (CW) EXISTING
COLD WATER (CW) DEMO
HOT WATER (HW)
HOT WATER (HW) EXISTING
HOT WATER (HW) DEMO
HOT WATER RETURN (HWR)
HOT WATER RETURN (HWR) EXISTING HOT WATER RETURN (HWR) DEMO
NON POTABLE COLD WATER (NPCW)
NON POTABLE COLD WATER (NPCW) EXISTING
NON POTABLE COLD WATER (NPCW) DEMO
NON POTABLE HOT WATER (NPHW)
NON POTABLE HOT WATER (NPHW) EXISTING
NON POTABLE HOT WATER (NPHW) DEMO
NON POTABLE HOT WATER RETURN (NPHWR)
NON POTABLE HOT WATER RETURN (NPHWR) EXISTING
NON POTABLE HOT WATER RETURN (NPHWR) DEMO
VENT (V)
VENT (V) EXISTING
VENT (V) DEMO
WASTE (W)
WASTE (W) EXISTING
WASTE (W) DEMO
STORM (ST)
STORM (ST) EXISTING
STORM (ST) DEMO
ACID VENT (AV)
ACID VENT (AV) EXISTING ACID VENT (AV) DEMO
ACID WASTE (AW)
ACID WASTE (AW) EXISTING ACID WASTE (AW) DEMO
UNDERGROUND VENT
UNDERGROUND VENT EXISTING
UNDERGROUND VENT DEMO
UNDERGROUND SANITARY OR STORM
UNDERGROUND SANITARY OR STORM EXISTING
UNDERGROUND SANITARY OR STORM DEMO
DEIONIZED WATER (DI)
DEIONIZED WATER (DI) EXISTING DEIONIZED WATER (DI) DEMO
REVERSE OSMOSIS (RO)
REVERSE OSMOSIS (RO) EXISTING REVERSE OSMOSIS (RO) DEMO
TEMPERED WATER (TW)
TEMPERED WATER (TW) EXISTING
TEMPERED WATER (TW) DEMO
GARAGE WASTE (GW)
GARAGE WASTE (GW) EXISTING
GARAGE WASTE (GW) DEMO
INDIRECT WASTE (IW)
INDIRECT WASTE (IW) EXISTING
INDIRECT WASTE (IW) DEMO
KITCHEN WASTE (KW)
KITCHEN WASTE (KW) EXISTING
KITCHEN WASTE (KW) DEMO
LAUNDRY WASTE (LW)
LAUNDRY WASTE (LW) EXISTING
LAUNDRY WASTE (LW) DEMO
NATURAL GAS (G)
NATURAL GAS (G) EXISTING NATURAL GAS (G) DEMO

PIPE GUIDE
DIRECTION OF FLOW
PIPE ANCHOR
UNION
VALVE
BALL VALVE
ANGLE VALVE
OS&Y VALVE
CHECK VALVE (SHOWN W/FLOW) BALANCING VALVE
CAPPED PIPING
PLUG END OF PIPE
GAS COCK
CONTROL VALVE
SOLENOID VALVE
GAS PRESSURE REGULATOR (GPR)
PRESSURE REDUCING VALVE (PRV) SAFETY/RELIEF VALVE
PRESSURE-TEMPERATURE RELIEF VALVE (PRV) SLEEVE
HOSE BIB (HB)
NON-FREEZE WALL HYDRANT (WH)
ROOF DRAIN (RD)
FLOOR DRAIN (FD)
FLOOR DRAIN (FD)
TRENCH DRAIN (TD)
CLEANOUT (CO)
FLOOR CLEANOUT (FCO)
GROUND CLEANOUT (GCO) P-TRAP
WALL CLEANOUT (CO) STRAINER
THERMOMETER (SPECIFY TYPE) (TH) PRESSURE GAUGE WITH GAUGE COCK (PG) AQUASTAT
WATER HAMMER ARRESTER (LETTER DESIGNATES SIZE)
BACKFLOW PREVENTER (BFP) BOTTOM DROP
ELBOW DOWN
ELBOW UP
RISE OR DROP
POINT OF DISCONNECTION
POINT OF CONNECTION (NEW TO EXISTING) OXYGEN OUTLET
MEDICAL VACUUM OUTLET
ANESTHESIA EVACUATION OR WAGD OUTLET
MEDICAL AIR OUTLET
COMPRESSED AIR OUTLET
NITROUS OXIDE OUTLET
CARBON DIOXIDE OUTLET
NITROGEN OUTLET
LABORATORY OUTLET
RISER INDICATOR / DETAIL INDICATOR
TOP INDICATES TYPE OF RISER / DETAIL NO. BOTTOM INDICATES RISER NUMBER / DWG NO.
RISER INDICATOR
TOP INDICATES TYPE OF RISER, BOTTOM INDICATES RISER NUMBER
(ARROW INDICATES DIRECTIONAL VIEW OF ISOMETRIC RISERS)
SECTION INDICATOR
TOP INDICATES SECTION NUMBER BOTTOM INDICATES DRAWING NUMBER
BASIN
EXPANSION JOINT
FLEXIBLE CONNECTION
PUMP
WATER METER
EXPANSION LOOP
VENT THRU ROOF OR ACID VENT THRU ROOF
ZONE VALVE BOX
PRESSURE SWITCH
MASTER OR AREA ALARM PANEL
NITROGEN CONTROL PANEL
MEDICAL CEILING COLUMN
WASHING MACHINE SUPPLY AND DRAIN BOX
KEYED NOTE

FAQs

What types of water and waste systems are listed in the plumbing reference?

It includes cold water (CW), hot water (HW), hot water return (HWR), non-potable lines, deionized water (DI), tempered water (TW), reverse osmosis (RO), plus waste and storm categories including acid vent/waste.

Which plumbing components and devices are referenced in the symbol list?

The document enumerates pipe and system elements such as unions, valves (ball, angle, OS&Y, check, solenoid), pressure regulators and relief valves, cleanouts, drains (roof/floor/trench), traps, meters, pumps, and backflow preventers.

How does the reference describe plan demolition state markings?

For many system categories (e.g., CW/HW/vents/waste), it distinguishes between existing conditions and demolition conditions using explicit “EXISTING” and “DEMO” labels.

Oct 25, 2026

Uploaded by Ophelia