Domestic Water Supply System
This page is the CodyCross answer for the clue below from World of Books, Group 282, Puzzle 2 (Original Manuscript).
Question is: Domestic Water Supply System
and the answer is: PLUMBING
Word Meaning:
PLUMBING — The pipes, together with the joints, tanks, stopcocks, taps, and other fixtures of a water, gas, or sewage system in a house or other building.
Definitions from Wiktionary.