A molded one-piece stub out and rough-in plumbing valve cylinder including a front cylindrical face having a front inner off-set cavity disposed therein, which extends to an inner wall member forming an integral conduit member that extends into an inner cylindrical rear cavity extending from an inner cylindrical rear wall surface on an opposite side of the front cylindrical face to an open ended mounting plate. The integral conduit member extends through the inner cylindrical rear cavity to a selective distance beyond the open end of the mounting plate. A plurality of support members disposed on the integral conduit member along a portion thereon and along portion of the inner cylindrical rear cavity for supporting the integral conduit member therein. Also, the integral conduit member includes a self-leveling member to level the mounting plate upon attachment to vertical or horizontal wall framed stud members.