Blue Mule Pump-Up Foam-All PRO 3 Creates high-quality, rich, clinging foam to increase contact time and maximize effectiveness Ideal for precision foam cleaning. Visual confirmation of coverage discourages over-application. This PRO model features a durable hose and trigger assembly for high demand usage. Fill the tank with ready-to-use chemical solution, pump it up, and start foaming! If compressed air is available, use the quick charge valve to eliminate pumping.