Profile: John Blue Co. provide precision agriculture equipments. Our product line includes pump drives, piston metering pumps, foam makers, knives, diaphragm pumps, spray control units, and accessories. Our VR-2455 Pump with its heavy-duty pump construction features cast iron housings, which handle most agricultural fertilizers and chemicals. The precision made 316 stainless steel check valves and piston rods are designed to resist corrosion. Our double piston rod seals assure proper sealing and smooth operation. Foam Markers are easy to install and operate. The system creates a highly visible foam line in the field that correctly marks your position. Mixing water with an inert foaming concentrate liquid in a 1.5 to 3 percent solution creates the foam and is both environmentally friendly while economical.