Definition

A device that helps control the water level in a tank by floating on the surface of the water and operating a valve.

Example

The plumber replaced the old ballcock to ensure the toilet tank filled properly.

Conversation

Have you ever had to replace a ballcock in a toilet tank?

No, I haven't, but I've heard it's not too complicated.

Yeah, I watched a video on it; the ballcock just controls the water level.

That makes sense! I should probably check mine to see if it needs fixing.

Synonyms & Antonyms

Root Explanation

The word 'ballcock' is formed from 'ball' (from Old English 'beall', meaning a spherical object) and 'cock' (from Old English 'coc', meaning a valve or tap). The term refers to a valve mechanism that uses a floating ball to control the flow of water, typically in a toilet tank.

Memory Tip

Think of a 'spherical object' ('ball') that acts like a 'valve' ('cock') to control water flow — that's how a ballcock works.

Visually Confused Words