Water is needed to stop the engine from overheating.
A water pump is needed to pump in fresh water.
Water gets to where it is needed by using the means necessary to transport or direct the water into such a way that the water is used in an area or means that fullfills its purpose.
Life.
Lube!
non tonic water
water, long boots water
So you can have hot water when needed.
water is needed for pin mould because water increase humidity and so pin mould grows more quickly.
You need the amount of water, the temperature of the water, and the desired temperature.
water
Water!!