Parabolas can be the only conic sections that are considered functions because they pass the vertical line test. We have worked with parabolas before in quadratic equations, but parabolas formed by conic sections are a little different.
Toilet drainage rough-in steps. 1  Cut a hole in the subfloor just large enough for the bottom part of the toilet flange to sit. 2  If your installing the drainage underground, excavate the trench and have a supply of clean backfill ready (sand or gravel) to grade and cover the pipe.
Installing a bath ventilation fan is not a job for the novice do-it-yourselfer to tackle alone, as it requires significant carpentry skill. But venting the fan to the outside once it has been installed is a relative simple task. The fan can be vented either through the ceiling or wall; however, venting through the wall is considerably less risky. Climb into the attic and locate the bath fan. Attach a 90-degree duct elbow to the outlet port on the side of the fan housing. Aim the elbow straight up, and secure it to the housing with metal duct tape (two wraps are sufficient).