The hot water from the boiler flows through the hot water pipes. The distance the hot water can travel from the boiler is affected by the distance and type of the water pipe to which it is attached. Attaching a large water pipe permits the boiler to pump hot water 59 blocks away with hot water pipes. If a small water pipe is attached, this affects the distance that the hot water will travel by -1 for each piece of small pipe between the boiler and the nearest large pipe. If there is only 1 piece of small pipe between the boiler and a large pipe, the maximum distance the hot water will travel is 46 blocks. This number is not affected by attached appliances, such as radiators or shower heads.