Grainfather Conical Cooling Pump Kit Dry Beer Yeast Does not come with the Does not come with the stainless steel float ball It needs to be regulated and stable throughout the whole fermentation process to ensure the yeast doesn't get stressed and ferments correctly to get the right flavor profile The Cooling Pump Kit allows users of the Grainfather Conical Fermenter to control the fermentation temperature with cold water by pumping it through the double walled insulated interior submerge the submersible pump into a cooler box with water (add ice for your required temperature) and pump the liquid through the insulated cooling sleeve of the Conical Fermenter body