Valves That Refill Toilet When the Floats Drop

This page is the CodyCross answer for the clue below from Inside the Spaceship, Group 1189, Puzzle 4 (Fantastical Creatures).

Question is: Valves That Refill Toilet When the Floats Drop

and the answer is: BALLCOCKS

Word Meaning:

BALLCOCKS — plural of ballcock

Definitions from Wiktionary.