Unlike hydraulic saws, no heavy, bulky power pack is needed and there are no hydraulic lines to get in the way. The CE94CRS Concrete Cutting Chainsaw produces no concrete dust and can cut materials up to 16 inches thick. Just one single water line with only a 2 gallon per minute flow at 20 psi is needed to cool and lubricate the chain, preventing concrete cutting dust. A garden hose from a residential hose bib is all that is needed but water can be supplied from any source: including a pump, tender, hydrant, standpipe, the ocean, a lake, stream or even a puddle. For more information, go to http://cuttersedge.com/products/ce94crs_concrete_cutting_chainsaw