| ABS | – | Acrylonitrile-Butadiene-Styrene |
| ANSI | – | American National Standards Institute |
| Appl. | – | Appliance |
| ASSE | – | American Society of Sanitary Engineers |
| ASTM | – | American Society for Testing and Materials |
| B (vent) | – | Double-walled gas appliance flue |
| BW (vent) | – | Oval double-walled gas appliance flue |
| Bldg. | – | Building |
| BT | – | Bathtub |
| Btu. | – | British Thermal Unit |
| C.I. | – | Cast Iron |
| C/O | – | Cleanout |
| CPVC | – | Chlorinated Polyvinyl Chloride |
| Cu | – | Copper |
| CW | – | Clothes Washer |
| Ext. | – | Exterior |
| Fe | – | Iron or steel pipe |
| FLR | – | Flood Level Rim |
| FU | – | Fixture Unit |
| GPM | – | Gallons Per Minute |
| IS | – | IAPMO Installation Standard |
| KS | – | Kitchen Sink |
| Lav, lavy | – | Bathroom lavatory sink |
| LT | – | Laundry Tub |
| NSF | – | National Sanitation Foundation |
| PB | – | Polybutylene |
| PE | – | Polyethylene |
| PEX | – | Cross-linked polyethylene |
| PL | – | Property line |
| Psi | – | Pounds per square inch |
| PVC | – | Polyvinyl Chloride |
| Sch. | – | Schedule (thickness) of pipe |
| SW | – | Single Wall gas flue pipe |
| WC | – | Water Closet |
| WM | – | Washing Machine |
