Yes, WIPERS is a Scrabble word!

Letter values in Scrabble US: W 4, I 1, P 3, E 1, R 1, S 1.

Is it a valid word?

WIPERS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a worker who wipes
contact consisting of a conducting arm that rotates over a series of fixed contacts and comes to rest on an outlet
a mechanical device that cleans the windshield

Also: wiper arm, contact arm, windshield wiper, windscreen wiper, wiper blade.