The list of plumbing and fire protection abbreviations used in a set of architectural drawings varies from office to office. Be sure to check the front section of the construction drawing set for the abbreviations used within.
AP | Access Panel |
BT | Bath Tub |
BWV | Back Water Valve |
CFH | Cubic Feet per Hour |
CFM | Cubic Feet per Minute |
CI | Cast Iron |
CLDI | Cement Lined Ductile Iron |
CO | Cleanout |
CONC | Concrete |
CP | Chrome Plated |
CTE | Connect to Existing |
CW | Cold Water |
CWR | Cold Water Return |
CWS | Cold Water Supply |
DCVA | Double Check Valve Assembly |
DF | Drinking Fountain |
DIA | Diameter |
EL or ELEV | Elevation |
EWC | Electrical Water Cooler (Drinking Fountain) |
FCO | Floor Cleanout |
FEC | Fire Extinguisher Cabinet |
FHV | Fire Hose Valve |
FLR | Floor |
FP | Fire Protection |
FPWH | Freeze Proof Wall Hydrant |
FS | Flow Switch |
FT | Foot or Feet |
FV | Flush Valve |
GALV | Galvanized |
GCO | Ground Clean Out |
GI | Grease Interceptor |
GPF | Gallons per Flush |
GPM | Gallons per Minute |
HC | Handicapped |
HW | Hot Water |
HWR | Hot Water Return |
HWS | Hot Water Supply |
ID | Inside Diameter |
INV | Invert |
IW | Indirect Waste |
MECH | Mechanical |
MSB | Mop Service Basin |
NC | Normally Closed |
NO | Normally Open |
OD | Outside Diameter |
OED | Open End Drain |
PIV | Post Indicator Valve |
PLBG | Plumbing |
PSI | Pounds per Square Inch |
RPBP | Reduced Pressure Backflow Preventer |
SA | Shock Absorber |
SD | Sanitary Drain |
SH or SHWR | Shower |
SK | Sink |
SS | Soil Stack or Stainless Steel |
TLT | Toilet |
TS | Tamper Switch |
TW | Tempered Water |
TYP | Typical |
U | Urinal |
V | Vent |
VB | Vacuum Breaker |
VFD | Variable Frequency Drive |
VS | Vent Stack |
VTR | Vent Through Roof |
W | Waste |
WC | Water Closet (Toilet) |
WH | Wall Hydrant |
WS | Waste Stack |