Abstract: A projection apparatus for projecting the axis of a plumbing fixture or an existing opening in a construction member onto a remote member, for locating an opening to be made in the remote member, has a body having at least a first cylindrical portion with a first diameter ending in a shoulder, the first cylindrical portion having an axis, and a laser pointer constrained in a cavity of the body such that the laser, when activated, projects along the axis. The apparatus is useful for projecting a center point from a plumbing fixture onto a remote member, such as for vent installation, and for aligning openings in construction members for pipes and other conduits. In an alternative embodiment the projection apparatus has a vertical-seeking element associated with the laser pointer, so a vertical line may be determined for an upward-facing open pipe that does not point perfectly vertical, but faces generally upward.