Just did mine today. The water pump is in the bathroom below the sink. When you open the cabinet door there is a cover with four screws in it at the bottom. Remove the screws and you will find two valves, one to shut off the fresh water line and another to open the antifreeze pickup line. The hose may be tucked behind the pump if you dont see it at first. The water heater bypass is behind a cover under the kitchen sink that I have found it easier to remove to get to the valves.