The Pressurator (P/N PT005) is a coolant system tester that’s powered by shop air. As the cooling system loses pressure, the PT005 adds more air and keeps pressure at the techs’ preset psi. No hand pumping lets the tech move around and under the vehicle while looking and listening for leaks. The safety valve guards against over pressurization by relieving excess pressure. It’s also good for checking cracked heads and blown gaskets. Visit www.mastertechproducts.com.