Abstract: An apparatus is disclosed for removing, re-inserting or inserting for the first time, sprinkler system risers into sprinkler system piping connector which connectors are located underground. The apparatus features an elongated tubular member having a pair of opposed slots from which wings or blades are urged upon impact of a threaded shaft disposed in the tubular member. The threaded shaft is moved downwardly to impact the blades by rotation of a handle attached to a threaded shaft. This downward movement of the shaft is carried out after the apparatus is inserted into a riser such that the wings can press upon the interior wall of the riser whereby continued threading rotation of the shaft translates the rotary motion to the riser such that the riser which has male threads, can threadedly engage a female threaded piping connector.

Abstract: A toilet seat assembly arranged to be readily and simply decoupled from a toilet bowl for cleaning includes an improved pivotable mounting assembly whereby forces will not be applied to any significant degree to the pivot pins. Further, the mounting arrangement reduces, if not eliminates, wobble of the seat relative to the bowl. A child's seat nests within the above assembly.