Brass valve "swings" out, no "O" rings and the piping is never disturbed. Holds vacuum or pressure in either direction. Self adjusting seats for quality seal. Eight position quarter-turn, self-locking handle. Valve seat replacement can be easily done. A Norkaslon™ ball and dual seats provide smooth, long lasting reliable operation. Cast Finish. Full flow. "Left hand" handle position standard. Rigid female NPT threads on both ends. Ship. wt. 12 lbs.