We found 4 dictionaries that define the word flapper valves:

General (2 matching dictionaries)

1. flapper valves: Merriam-Webster
2. flapper valves: TheFreeDictionary.com

Business (1 matching dictionary)

3. Construction Term Glossary (No longer online)

Computing (1 matching dictionary)

4. flapper valves: Encyclopedia

▸ Words similar to flapper valves ▸ Usage examples for flapper valves ▸ Idioms related to flapper valves ▸ Wikipedia articles (New!) ▸ Words that often appear near flapper valves ▸ Rhymes of flapper valves ▸ Invented words related to flapper valves