The Smartflow Flow Regulator is a manually adjustable needle valve, flow meter and temperature gauge assembly in one package that is available in three connection sizes: ¼ in., 3/8 in. or ½ in. inlet, all with 3/8 in. outlet. Flow ranges are available in 0-1.5, 0-2.5 and 0-8 gallons per minute and 10 or 30 liters per minute. Flow rate accuracy is 䔮 percent. Temperature gauge accuracy is ۬ percent.