JOHN BLUE is a long-time manufacturer of quality pumps and related products for liquid fertilizer application, metering, and injection. Their durable Ground Drive Piston Pumps for liquid fertilizer application are extremely accurate. They also produce high-flow wet seal transfer pumps, squeeze pumps, and irrigation injection pumps. In addition to pumps, they offer a complete line of essential accessories including flow Dividers, check valves, flow Monitors, and electronic Liquid Blockage Monitors.