Traditionally, Iron Pipe Size, but can also mean that it has male pipe threads (threads on the outside of the pipe).
Iron - Pipe - Size -
Iron Pipe size
Female Iron Pipe Thread
Iron Pipe Size
Iron Pipe Size
well i really dunno, but in schools its means physical education. (gym class)
FIPS or Flange or solder Or Braze Or Weld / Or MJ
In plumbing IPS means "iron pipe size" that categorizes the thickness of pipe walls, still used by some manufacturers of iron and polyvinyl chloride, or PVC, piping that connects to faucets for home and business use. alliedallcityinc.com
SWT: This stands for "sweat", which is another term for "solder" (typically used to join copper pipes).
DRZ is not an acronym that is used in the plumbing industry so it does not stand for anything. DFU in plumbing means drainage fixture unit.
IPS stands for "Inches Per Second" and is a unit of measurement used to express the speed or rate of something over time.
NPT (National Pipe Thread) and IPS (Iron Pipe Size) fittings differ in their thread design and compatibility. NPT fittings have tapered threads, while IPS fittings have straight threads. NPT fittings are commonly used for general plumbing applications, while IPS fittings are typically used for larger diameter pipes. To determine which is more suitable for your specific project, consider the pipe size and application requirements.