Yes, PIPETTES is a Scrabble word!

Letter values in Scrabble US: P 3, I 1, P 3, E 1, T 1, T 1, E 1, S 1.

Is it a valid word?

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

measuring instrument consisting of a graduated glass tube used to measure or transfer precise volumes of a liquid by drawing the liquid up into the tube