Tamper resistant valve actuator for fire hydrant

摘要: A tamper resistant valve actuator for a fire hydrant has bullet shaped nose presenting nongrippable conical surface. Three equally spaced shallow recesses are provided in the surface at common elevation. special wrench includes radially projecting set screws adapted complementary fit within and adjustable tightening thereto operating stem. The is designed installation on conventional assemblies substitution of existing pentagon head nut. In modified embodiment, nut with stem socket compatibility another form assembly. addition, receiving placed variant pattern.