AUTOMATIC FERTILIZING EVERY TIME YOU WATER!! EZ FLO FERTILIZER SYSTEMS. fertlizer-dispensing-systems ezflo2.5 main line fertililizer dispensing system. 2.5 gallon (9.4 liter) with shutoff valves and pressure relief valve. also includes cbv100 ball valve coupling. ezflo25Regular price: $299.00Sale price: $289.00 ez2013hb fertilizer dispenising system. Low pressure 1-1/3 gallon capacity. Hose and drip connection. Mfg. EZ FLO ez202013Regular price: $71.99Sale price: $60.99