Plumbing abbreviations
Here some of the most common abbreviations used in the plumbing and heating trade.
| ABS | acrylonitrile-butadiene-styrene |
| AL | aluminum |
| BG | bathroom group |
| BT | bath tub |
| CW | cold water or clothes washer |
| cm2 | square centimeter(s) |
| °C | degrees Celsius |
| CI | cast iron |
| CO | clean out |
| CPVC | chlorinated polyvinyl chloride |
| dia | diameter |
| DF | drinking fountain |
| DW | dish washer |
| DWV | Drainage, waste and vent |
| FD | floor drain |
| FU | fixture unit |
| h, hrs | hour(s) |
| HW | hot water |
| HWT | hot water tank |
| in. | inches |
| ips | iron pipe size |
| kg/m2 | kilograms per meter squared |
| Kpa | kilopascals |
| Kn/m2 | kilonewtons per meter squared |
| KS | kitchen sink |
| L | litre(s) |
| L/s | litres per second |
| lav | lavatory |
| lbs | pounds |
| LT | laundry tray |
| m | meter(s) |
| m2 | meters squared |
| MJ | mechanical joint |
| mm | millimeters |
| PE | polyethylene |
| PEX | crosslinked polyethylene |
| PP-R | polyvinyl chloride |
| PRV | pressure relief valve or pressure reducing valve |
| Psi | pounds per squared inch |
| Psia | pounds per square inch absolute |
| Psig | pounds per square inch gauge |
| RD | roof drain |
| SH | shower |
| SJ | slip joint or soldered joint |
| SS | service sink |
| T&P | temperature and pressure relief |
| UR | urinal |
| WC | water closet (toilet) |