A fuel cell valve assembly for a fuel cell for combustion powered hand tools, said valve assembly (22) comprising a valve body, a valve stem (28) movcably disposed in the valve body and movable between a closed position in which, in use, fuel is prevented from flowing from the fuel cell and an open position in which fuel can flow from the fuel cell into a first fuel receiving passage that is defined by the valve stem and a valve stem cap (38) disposed on said valve stem, said valve stem cap having a second fuel receiving passage (46) that is in flow communication with said first fuel receiving passage and is provided with a plurality of exit holes (52) that each extend transversely of said second fuel receiving passage.