flap valve

10 LETTERS · STARTS WITH F

flap valve is a valid 10-letter word worth 20 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

F4L1A1P3V4A1L1V4E1

4 + 1 + 1 + 3 + 0 + 4 + 1 + 1 + 4 + 1 =20 PTS

DOUBLE WORD → 40TRIPLE WORD → 60

MEANING

What does flap valve mean?