backwater valve

15 LETTERS · STARTS WITH B

backwater valve is a valid 15-letter word worth 31 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3A1C3K5W4A1T1E1R1V4A1L1V4E1

3 + 1 + 3 + 5 + 4 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 4 + 1 =31 PTS

DOUBLE WORD → 62TRIPLE WORD → 93

MEANING

What does backwater valve mean?