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drop valve

American  

noun

  1. a valve, as for a steam engine, that drops freely to close.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The drop valve, which opens for a flush, sits underwater at the bottom of the cistern.

From BBC

Most dual-flush toilets use a drop valve system, which was allowed onto the UK market back in 2001 due to a change in regulations.

From BBC

The drop valve is now displacing the slide valve as a better form of excluding or admitting steam.

From Project Gutenberg