A steady water flow throughout your water distillation greatly increases the quality and consistency of your finished product. The Water Flow Regulator eliminates water pressure fluctuations found in homes with tank/well water systems. The Water Flow Regulator includes: It’s own built in pump to supply water to your still. A float valve to regulate how much water it holds. A water flow controller, so that you can set it to the exact flow rate for your needs. A cool reservoir to store up to 1 L of water.