Device Found in Toilet Cisterns and Water Tanks

This page is the CodyCross answer for the clue below from Making a Documentary, Group 1512, Puzzle 4 (Travel and Cuisine).

Question is: Device Found in Toilet Cisterns and Water Tanks

and the answer is: BALLVALVE

Word Meaning:

BALL VALVE — A contrivance by which a ball, placed in a circular cup with a hole in its bottom, operates as a valve.

Definitions from Wiktionary.

Device Found In Toilet Cisterns And Water Tanks - Making a Documentary CodyCross Answers | CodyCross Solutions