water seal

noun

1. a small amount of water contained in the trap of a drain to prevent the passage of foul smells

Example Sentences

To make a trap with what is known as a water-seal, the U pipe is turned into an S fallen forward, .

From Project Gutenberg

These ash-pits are themselves provided with an overflow consisting of a siphon-tube forming a water-seal.

From Project Gutenberg

Both tubes were connected to a water seal bottle, and the dressing was applied.

From Project Gutenberg

At S and T are glands which provide a water seal against the inleakage of air and the outleakage of steam.

From Project Gutenberg

The water seal in the traps may evaporate, and thus give direct sewer-air connection with the house.

From Project Gutenberg