an automatic sidewall sprinkler includes a body , a deflector , a closure member , and a trigger . the deflector is movably mounted between a retracted position wherein at least a portion of the deflector is recessed within the body and an extended position for dispersing pressurized fluid . the deflector includes at least two horizontal deflecting surfaces for directing the fluid outwardly and downwardly from the sprinkler . the trigger applies a biasing force to urge the deflector in the retracted position and to urge the closure member to close the outlet . upon detecting a temperature associated with a fire , the trigger releases the biasing force whereby the pressurized fluid moves the closure member off the outlet and moves the deflector to the extended position . preferably , the trigger includes an ejector member which urges the trigger to eject outwardly from the body to improve release of the trigger from the sprinkler .