The foam injector from Water Cannon is designed for light- to heavy-duty pressure washing. It delivers up to 5,000 psi with a maximum flow of 5.3 gpm. The foam injector operates with cold or hot water (up to 140 degrees F) pressure washers and delivers a spray pattern that ranges from a straight stream to a 50-degree angle. 800/333-9274; www.watercannon.com.