The IC2 Pump is capable of draining Water or Lava, which can be used to fill an empty bucket or an Empty Cell. The pump affects any liquid located directly below itself.
In combination with a Compressor, it will automatically extract the Water with no need to use an Empty Cell. The Compressor will then produce a snow ball out of it. This will not work with a Singularity Compressor, though.
If placed next to a Miner it will drain the Lava and Water encountered by the Miner as it digs into the ground, making it an efficient way of producing Lava Cells.
Maximum input: 32 EU/t Before Exploding