Wolowitz Zero-Gravity Waste Disposal System

The Wolowitz Zero-Gravity Waste Disposal System (mockingly referred to as the Wolowitz Zero-Gravity Human Waste Distribution System by Raj) is a malfunctioning zero-G, high-tech toilet designed for NASA by Howard and deployed on the International Space Station after the space shuttle docking. Appearing in The Classified Materials Turbulence and mentioned in The Benefactor Factor, this is Howard's second achievement in space plumbing, as Howard refers to the Pishkin-Wolowitz Liquid Waste Disposal System in The Cooper-Nowitzki Theorem. Howard is going over the schematics on his zero-G toilet and realizes he made a mistake on the specifications for the diverter valve, hence, it is going to fail after about ten flushes. Howard says that Sheldon and Raj need to help him find a way to reinforce the structure so the waste material avoids the spinning turbine, so Raj suggests using two-inch PVC to reinforce the center cross-support. Once Howard says that it is no good, Raj recommends instead of trying to reinforce the structure, they just run another line, bypass it entirely. Sheldon points out it won't work as the diameter of the tubing is insufficient. Then, Raj asks if they could reposition the collection tank, but Howard reveals there is no way to mount it. Similarly, Howard wants to wedge a little piece of PVC behind the support rod, though, Sheldon informs Wolowitz he's overestimating the tensile strength of the substructure he is building. Raj shows another item instead of the PVC to keep the transverse filter assembly in place, without understanding that it is not a spare part on the Space Station but is rather the plastic device used to keep the cheese from coming in contact with the lid of the pizza box. They eventually test a prototype and Howard notifies NASA with the solution, yet the space toilet apparently still fails.