Super Max 8720 ASTPrice excludes freight. The Super Max 8720 AST is a portable, electric cold water pressure washer powered by a 5 HP NEMA engine to provide high pressure (2000 psi) and flow rate (4 GPM) than the 8700 AST. The most outstanding feature of this cold water pressure washer is its use of Daimer's exclusive AST (Automatic Shutoff Technology). This world's only control prolongs the life of the 8720 AST by reducing the wear and tear on the pump and other