pipefitting

UK: /ˈpaɪpˌfɪtɪŋ/

Collins Concise English Dictionary © HarperCollins Publishers::

pipefitting / ˈpaɪpˌfɪtɪŋ/ noun

1. the act or process of bending, cutting to length, and joining pipes
2. the branch of plumbing involving this
3. the threaded gland nuts, unions, adaptors, etc, used for joining pipes

ˈpipeˌfitter noun

WordReference Random House Unabridged Dictionary of American English © 2025

pipe′ fit′ting, 

1. Building a joint or connector, as an elbow, union, or tee, used in a pipe system.
2. Building the work performed by a pipe fitter.
• pipe¹ + fit¹ + -ing¹ 1885–90