Method and apparatus for mounting a plumbing fixture

Claim 1

A plumbing assembly, comprising: a support having an opening; a hold-down ring having a body mounted in said support opening and a flange seated on the support about the opening, the flange having a flange opening; a plumbing fixture mounted on the support, said plumbing fixture having an opening adjacent said flange opening; an elongated threaded member disposed in the flange opening and the fixture opening such that an upper end of the threaded member is above the fixture opening and the opposite, lower end of the threaded member below the flange opening; a lower nut mounted on the threaded member beneath the flange; first means carried by the flange for engaging the lower nut to prevent its rotation as the threaded member is being rotated; a washer mounted on the threaded member between the plumbing fixture and the flange, and frictional means carried by the washer and engaging the threaded member to prevent passage thereof through the flange opening except by rotation thereof, said washer being slidably movable with respect to the threaded member as it is being rotated about its longitudinal axis whereby the washer is operative to prevent separation of the lower nut from said first means; and an upper nut so mounted on the upper end of the threaded member as to be operative to be rotated with the threaded member whereby said hold-down ring flange and the plumbing fixture are clamped together between said upper nut and said lower nut.