Offshore pump
Template:Machinery The offshore pump is the only source of water. It is commonly used to provide steam to steam engines for power generation. The offshore pump itself requires no power to operate. (This is because, otherwise the game might fall into a serious deadlock: No coal, no electricity, no water...)
In game testing, a pump will push water at about 8UOL/Sec. (UOL is unit of liquid, more info at Liquid network ) The amount pushed a second decreases as pressure builds in the Liquid network. No notable drop-off of units/sec are really seen till the network is at about 80% full. For basic calculations it is safe to assume that 8UOL/Sec per pump is a safe bet as if you are using steam engines your network will most likely never be "full".
See also
-Current as of version 0.12.22 Template:MachineNav