EZ-Flo HI-FLO High-Pressure Fertilizer Dispensing System, 86 Gallon86 Gallon HI FLO High Pressure System with HF Metering Head (325 liter) These systems are designed for Ag, Golf, Parks, and Sports Fields. These systems can inject both fertilizers and acids. EZ FLO Engineered Dispensing Systems attach directly to your waterline to inject a variety of products. The operating principle is the same as all other EZ FLO dispensing systems with added capacity and control over the injection rates. As the name suggests, the